#ethereum

Live on-chain network statistics, mempool conditions and market data across the major UTXO blockchains and Ethereum, sourced from Blockchair. For any supported chain read the full network state — best block height, total and 24-hour block and transaction counts, mining difficulty, hashrate, coin circulation, on-chain transfer volume and chain size — or zoom into the mempool to see pending transactions, mempool size, transactions-per-second, the suggested fee per byte (or median gas price on Ethereum) and average and median transaction fees in native units and USD, or pull market data with the coin price in USD and BTC, 24-hour change, market capitalisation and dominance. Ten chains are covered: Bitcoin, Bitcoin Cash, Litecoin, Dogecoin, Dash, Zcash, Bitcoin SV, eCash, Groestlcoin and Ethereum. Distinct from single-chain mempool and gas feeds: this is one consistent multi-chain stats surface.

api.oanor.com/blockchair-api

Live on-chain decentralized-exchange market data across 35+ blockchains, with no key. List every supported network with its 24h DEX volume, transaction count and pool count; read the DEXes active on any chain; pull the top liquidity pools ranked by volume; get full token detail with multi-window price stats; search across every chain for tokens, pools and DEXes; and read global coverage totals. The on-chain / DEX / liquidity-pool layer for DeFi dashboards, token analytics, trading and research — distinct from centralized-exchange ticker readers. Live from DexPaprika (by the CoinPaprika team); short cache only.

api.oanor.com/dexpaprika-api

A live, queryable index of every Ethereum Improvement Proposal (EIP) and ERC token standard, read keyless straight from the canonical ethereum/EIPs and ethereum/ERCs repositories. Look up any proposal by number for its title, status (Draft, Review, Last Call, Final, Living, Stagnant or Withdrawn), type and category, authors, creation date, what it requires and its abstract; pull several proposals at once; or list the whole catalog of 1,500+ EIPs and ERCs. The reference layer for wallets, block explorers, documentation sites and developer tooling that need to resolve "what is EIP-1559" or "is ERC-4626 final yet" programmatically instead of scraping a website. Always current — read live from the source repos, lightly cached.

api.oanor.com/eipregistry-api

Decode Ethereum smart-contract function and event signatures, keyless. Turn a 4-byte function selector (the first 4 bytes of any transaction calldata, e.g. 0xa9059cbb) into its human-readable function signature (transfer(address,uint256)), decode a 32-byte event topic from a log into its event signature, or search the database by name to find a selector. Many selectors have hash collisions — the API flags the original / canonical signature. Backed by the open 4byte.directory database, live. Essential for transaction decoders, block explorers, wallets, security tools and on-chain analytics — the signature-decoding layer for any EVM tooling.

api.oanor.com/ethsignatures-api

Live protocol metrics for Compound Finance, one of the original decentralized lending protocols, keyless. Get the total value locked across every chain Compound is deployed on, the per-asset markets across Compound v2 and v3 (Comet) with supply APY and TVL — including the v3 distinction where collateral assets back a single borrowable base asset and do not earn yield (earns_yield) — and protocol fees. One combined overview endpoint snapshots it all. Live, nothing stored. The Compound-metrics layer for DeFi dashboards, lending, yield and risk apps — distinct from other lending protocols, this is Compound own markets, v2 + v3, multi-chain.

api.oanor.com/compound-api

Live protocol metrics for EigenLayer (EigenCloud), the protocol that pioneered restaking on Ethereum, keyless. Get the total value restaked, the breakdown of which assets are restaked into EigenLayer (native ETH and liquid-staking tokens like stETH, ETHx, swETH, rETH), per-chain TVL and protocol fees. One combined overview endpoint snapshots it all. Live, nothing stored. The restaking-metrics layer for DeFi dashboards, staking, LRT and risk apps — distinct from DEX, lending and generic DeFi/TVL browsers, this is EigenLayer restaking specifically, including the restaked-asset composition.

api.oanor.com/eigenlayer-api

Live protocol metrics for Aave, the largest decentralized lending protocol, keyless. Get the total value locked across every chain Aave is deployed on, the per-asset lending markets with their supply APY (base + rewards), 30-day average and TVL across Aave v3 / v4, and protocol fees. One combined overview endpoint snapshots it all. Live, nothing stored. The Aave-metrics layer for DeFi dashboards, yield, lending and risk apps — distinct from DEX and generic DeFi/TVL browsers, this is Aave lending markets specifically, multi-chain.

api.oanor.com/aave-api

Live protocol metrics for Uniswap, the largest decentralized exchange (DEX), keyless. Get the total value locked across every chain Uniswap is deployed on, DEX trading volume (24h / 7d / 30d / all-time, with change), protocol fees, and the top Uniswap liquidity pools with their TVL and APY (Uniswap v2 / v3 / v4). One combined overview endpoint snapshots it all. Live, nothing stored. The Uniswap-metrics layer for DeFi dashboards, analytics, yield and trading apps — distinct from generic DeFi/TVL browsers, this is Uniswap specifically, multi-chain.

api.oanor.com/uniswap-api

Live EVM token-safety checks — does this token let you sell, and what will it cost you? A "honeypot" is a token you can buy but cannot sell: the contract blocks the sell, traps your money or charges a punishing tax. This API detects it the only reliable way — by actually simulating a buy and a sell of the token against its real liquidity pool on-chain, right now (powered by honeypot.is), and reporting whether the sell went through, the live buy/sell/transfer tax, the gas cost and a plain risk summary. Beyond the honeypot verdict it returns the token's DEX trading pairs with their on-chain reserves and USD liquidity, the largest holders with the top-10 supply concentration (a top-heavy token can be dumped on you), and whether the contract source is verified/open and makes proxy calls. Covers Ethereum, BNB Chain, Base and other EVM chains. This is the EVM token-safety cut via live buy/sell simulation — distinct from the Solana rug-risk feed, which inspects SPL mint authorities on a different chain with a different method. A safety signal, not financial advice — always verify before trading.

api.oanor.com/honeypot-api

The major Ethereum liquid-restaking tokens (LRTs) compared side by side, read keyless directly from the Ethereum blockchain via a public RPC node. Restaking is the DeFi narrative EigenLayer kicked off: you stake ETH and then restake it to also secure other services, earning Ethereum staking rewards PLUS restaking rewards on top. A liquid-restaking token — weETH (ether.fi), ezETH (Renzo), pufETH (Puffer) or rswETH (Swell) — is the liquid receipt for that position, and its on-chain exchange rate against ETH climbs as those combined rewards accrue. Restaking is a distinct, fast-moving asset class from plain liquid staking, and the spread between these tokens' rates and yields is what someone choosing a restaking provider (or arbitraging between LRTs) needs in one place. The rates endpoint is the comparison table: every tracked LRT with its live ETH exchange rate, its net APR over the last 30 days, its token supply and its issuer, ranked by yield. The token endpoint drills into one LRT by symbol — its rate, supply, ETH backing (TVL) and the APR over the last day, week and month. The convert endpoint converts any amount between any LRT and ETH, or between two LRTs, at the current on-chain rates. This is the liquid-RESTAKING comparison cut — distinct from liquid-STAKING tokens (the lstcompare feed), the single-protocol feeds (ether.fi, lido) and the DeFi-TVL feeds. Each token rate comes from its own on-chain rate source (a getRate() call, a rate-provider, or an ERC-4626 vault, depending on the protocol). APR is derived from real historical on-chain state; the 30-day window is used because several LRT rates update on an oracle schedule or in discrete ERC-4626 steps, making shorter windows noisy. The rate reflects realised value accrual — many LRTs additionally distribute points/airdrops that are NOT captured by the exchange rate. Rates are ETH per token. Keyless, nothing stored beyond a short cache.

api.oanor.com/lrtcompare-api

The major Ethereum liquid-staking tokens (LSTs) compared side by side, read keyless directly from the Ethereum blockchain via a public RPC node. When you stake ETH through Lido, Rocket Pool, Coinbase, Binance or Frax you receive a liquid-staking token — wstETH, rETH, cbETH, wBETH or sfrxETH — whose on-chain exchange rate against ETH climbs as staking rewards accrue. Those rates, and the yields implied by how fast they climb, differ between providers, and that spread is exactly what someone choosing where to stake (or arbitraging between LSTs) needs in one place. The rates endpoint is the comparison table: every tracked LST with its live ETH exchange rate, its net staking APR over the last week (derived from the on-chain rate growth), its token supply and its issuer, ranked by yield. The token endpoint drills into one LST by symbol — its rate, supply, ETH backing (TVL) and the APR over the last day, week and month. The convert endpoint converts any amount between any LST and ETH, or between two LSTs, at the current on-chain rates. This is the cross-LST comparison cut — distinct from the single-protocol feeds (lido, Rocket Pool, ether.fi) and the DeFi-TVL feeds: it is about the exchange rates and on-chain-derived yields of the staking tokens themselves. Every number is read live from each token contract; APR is derived from real historical on-chain state, not a marketing figure. Rates are ETH per token. Keyless, nothing stored beyond a short cache.

api.oanor.com/lstcompare-api

Live data for Lido, the largest liquid-staking protocol in crypto, read keyless directly from the Ethereum blockchain via a public RPC node. Stake ETH with Lido and you get stETH, a rebasing token worth one ETH that earns Ethereum staking rewards; wstETH is the wrapped, non-rebasing version whose exchange rate against stETH grinds upward as rewards accrue — the form most of DeFi actually holds. Lido is by far the biggest staker of ETH, so its size and yield are a benchmark the whole staking market is measured against. The overview endpoint is the headline: how much ETH is staked through Lido (its TVL in ETH, equal to the stETH supply), the wstETH supply, the current wstETH-to-stETH exchange rate and the net staking APR. The apr endpoint computes the real, net-of-fees staking yield directly from the on-chain wstETH exchange rate — how much that rate has grown over the last day, week and month, annualised with actual block timestamps — the honest yield a wstETH holder has earned, not a marketing figure. The wsteth endpoint is the wstETH conversion reference: how much stETH one wstETH is worth and vice-versa, the wstETH supply and the share of stETH that is wrapped. The convert endpoint converts any amount between ETH, stETH and wstETH at the current on-chain rate. This is the Lido cut — distinct from ether.fi (liquid restaking), Rocket Pool (rETH) and the Ethereum staking-queue and consensus feeds. Everything is read live from the stETH and wstETH contracts; no USD value is fabricated. Keyless, nothing stored beyond a short cache.

api.oanor.com/lido-api

The live Ethereum validator entry and exit queues, read keyless straight from a public consensus-layer (Beacon) node. To stake on Ethereum you join a queue to activate a validator, and to unstake you join a separate queue to exit — both rate-limited by the protocol churn limit. The size of these queues is the cleanest real-time signal of staking demand and exit pressure: a long entry queue means capital is rushing in to stake, a long exit queue means validators are leaving. Liquid-staking protocols, exchanges, stakers and ETH analysts watch the queue to time deposits and withdrawals. The queue endpoint is the headline dashboard — how much ETH is waiting to activate (entry) versus exit, the validator counts behind each, the net flow, and an estimate of how long each queue takes to clear at the current activation/exit churn limit (256 ETH per epoch, ~6.4 min). The entry endpoint breaks down the activation side (validators already eligible and churning in, plus freshly-deposited validators not yet eligible). The exit endpoint breaks down the exit side (voluntary exits plus validators forced out by slashing). The validator endpoint looks up any single validator by index or public key: status, balance, effective balance, slashed flag and activation/exit epochs with wall-clock times. ETH amounts are the meaningful queue metric — a single post-Pectra validator can hold up to 2048 ETH — with counts given alongside. Distinct from beaconchain-api (consensus finality), the Solana validator feeds and the liquid-staking protocol feeds. Live, keyless, nothing stored beyond a short cache.

api.oanor.com/ethstakingqueue-api

The live consensus state of Ethereum's Beacon Chain — the proof-of-stake layer that secures Ethereum — read keyless straight from a public consensus-layer node. The single thing that matters for the health of proof-of-stake Ethereum is whether it is finalizing: every epoch (about every six and a half minutes) the validators are supposed to justify and then finalize the chain, and on the rare occasions that finality stalls — as it briefly did in 2023 — staking services, exchanges and bridges need to know immediately. The status endpoint returns the current head slot and epoch, how far through the current epoch the chain is and how long until the next one, the finalized and justified epochs, the finality lag (how many epochs behind finality the head is — a lag of two is healthy, a growing lag is trouble) and whether the node is fully synced and finalizing. The finality endpoint returns the finalized, current-justified and previous-justified checkpoints in detail, with how far behind the head each is in epochs and minutes. The genesis endpoint returns the chain's genesis time, how long Ethereum proof-of-stake has been running and the slot/epoch timing constants (a slot every 12 seconds, 32 slots per epoch). This is the Ethereum consensus / finality cut — distinct from the execution-layer feeds (gas, blocks, transactions), the staking-token and restaking feeds and the price feeds: it is the beacon chain's own heartbeat. Note it reports consensus state (slots, epochs, finality), not per-validator economics, which a public consensus node does not serve in one call. Times are UTC; epochs and slots are integers. No key, nothing stored beyond a short cache.

api.oanor.com/beaconchain-api

The on-chain prices that DeFi actually runs on, read live and keyless straight from Chainlink's price-feed contracts on Ethereum. Chainlink is the dominant oracle: a decentralised network writes each price on-chain and refreshes it on a heartbeat or when it moves past a deviation threshold, and thousands of lending, perpetual and stablecoin protocols read that exact number to value collateral and trigger liquidations. What matters is not just the price but whether the feed is fresh — a stale Chainlink feed is how DeFi protocols break — and that on-chain freshness is exactly what this exposes. The feeds endpoint lists every tracked Chainlink feed (crypto, stablecoins and FX) with its current on-chain answer, how many seconds ago it last updated and whether it is fresh. The feed endpoint returns one pair's full detail by name, including the round id, the update timestamp and the feed contract address. The health endpoint is the oracle-monitoring view: how many feeds are fresh versus stale, the stalest feed and the average update age — the on-chain reliability picture that a plain price API can't give you. Each price is read from the feed's latestRoundData and scaled by the feed's own on-chain decimals (USD feeds use 8); the update time is the contract's updatedAt. This is the Chainlink on-chain-oracle cut — distinct from the off-chain oracle-price APIs (which serve a price but not the on-chain feed's round and freshness) and from the exchange price feeds. Prices are in the feed's quote unit (USD here); times are UTC. No key, nothing stored beyond a short cache.

api.oanor.com/chainlink-api

What it actually costs a user to transact on each Ethereum layer-2 rollup, live and keyless, powered by the public growthepie dataset. Ethereum's base layer is expensive, so most activity has moved to rollups — Arbitrum, Base, OP Mainnet, zkSync Era, Linea, Scroll, Starknet, Mantle, Mode, Metis, Celo, Taiko, Unichain — but the cost of a transaction varies a lot between them, and that is the number a user choosing a chain, or a developer deciding where to deploy, actually wants. This answers "which L2 is cheapest to use right now", in plain dollars. The chains endpoint is the league table: every tracked rollup ranked from cheapest, each with its median transaction cost (USD and ETH), native-transfer cost, token-swap cost, average cost and throughput (transactions per second and Mgas/s); Ethereum L1 is included as the baseline so you can see the L2 saving. The chain endpoint returns one rollup's full current cost-and-performance detail plus a short recent history of its median cost. The cheapest endpoint cuts to the chase — the single cheapest rollup right now for a simple transfer and for a token swap, and how much cheaper that is than Ethereum L1. Because the upstream rounds USD to four decimals (so ultra-cheap rollups would read $0.00), the dollar figures are recovered precisely from each chain's exact ETH cost and the ETH price implied by the same payload — no second data source. This is the L2 user-transaction-cost cut — distinct from the L2 economic-activity feed (active addresses, transaction count, rollup revenue and profit: what the chains earn, not what they cost you), from the multi-chain gas-oracle (gas tiers in gwei) and from the blob data-availability fee market (the L1 cost rollups pay to post data). Costs in USD and ETH, throughput in TPS and Mgas/s, no key, nothing stored.

api.oanor.com/l2fees-api

Who actually builds Ethereum's blocks and which relays deliver them — live from the public MEV-Boost relay APIs, no key. Since the Merge most Ethereum validators outsource block construction through MEV-Boost: specialised block builders compete to assemble the most valuable block (capturing MEV — arbitrage, liquidations, sandwiches — plus priority fees), relays act as trusted middlemen between builders and validators, and the validator simply signs the highest-paying block. This builder-and-relay market is one of the most important and most centralised pieces of Ethereum's infrastructure — a handful of builders win the large majority of blocks — so tracking who is winning and how much they pay is core to Ethereum decentralisation and MEV analytics. The builders endpoint ranks block builders by how many of the recent blocks they won, with each builder's block share, the total and average value (in ETH) they paid validators, and a name where the builder's public key is known. The relays endpoint shows each MEV-Boost relay's reach across the major relays (Flashbots, Ultrasound, bloXroute, Agnostic, Aestus, Titan). The blocks endpoint lists the most recent blocks delivered through MEV-Boost, each with its builder, the value paid to the proposer, gas used, transaction count and which relays delivered it. This is the block-building / MEV-Boost cut, the supply side of Ethereum block production — distinct from the blob-space fee market, the execution-gas oracle, the ETH supply/burn feed and the on-chain and DeFi feeds. Values are in ETH; everything is live. Built for Ethereum infrastructure, MEV research, staking and analytics tools.

api.oanor.com/mevboost-api

The Ethereum blob data-availability fee market that every layer-2 rollup lives and dies by, live from the public Blobscan dataset, no key. Since the Dencun upgrade (EIP-4844, proto-danksharding) rollups no longer post their compressed transaction data as expensive calldata — they post it as blobs, large temporary data packets priced in their own independent fee market (the blob-gas market, with its own base fee that rises when blocks are full of blobs and falls when they are not). Blob space is now the single biggest cost line for almost every rollup, so the blob base fee and how much blob space each rollup consumes is the core economics of the entire layer-2 ecosystem — when blob demand spikes, every rollup's costs (and ultimately its user fees) rise together. The network endpoint returns the live state of the blob fee market: the current blob base fee, the average over recent blocks, the average blobs per block against the protocol target and maximum, the resulting utilisation, the excess blob gas that drives the fee, and the data-availability fee burned per block. The rollups endpoint is the key view — it ranks the layer-2 rollups by how much blob space they are consuming right now (Base, Arbitrum, Optimism, World, Taiko and the rest), each with its blob count, blob gas used, share of all blob space and the data-availability fee it is paying in ETH. The blocks endpoint lists the most recent blocks with their blob count, blob base fee and DA fee. This is the blob / data-availability fee-market cut — distinct from the multi-chain execution-gas oracle (the EIP-1559 execution-gas market, not the separate blob-gas market), the ETH supply/burn feed (which reports a single blob-base-fee number but not blob-space utilisation or which rollups consume it), and the on-chain and TVL feeds. Fees are in gwei and ETH; figures are live, per block.

api.oanor.com/blobspace-api

Live Ethereum layer-2 / rollup risk and value-secured data from L2BEAT — no key, nothing stored. L2BEAT's signature is its independent risk framework: every rollup is rated by maturity Stage (Stage 0 / 1 / 2) and assessed across the canonical risk dimensions — sequencer failure, state validation, data availability, exit window and proposer failure — each carrying a good / warning / bad sentiment and a plain-language explanation. This is the rollup-risk and total-value-secured (TVS) view, distinct from the L2 economics/fundamentals and the on-chain per-chain APIs in the catalogue. The projects endpoint lists every tracked L2 with its type (Optimistic Rollup, ZK Rollup, Validium, layer3…), category, host chain, maturity Stage, TVS and 7-day change. The project endpoint returns one rollup in full — the TVS breakdown (native / canonical / external, and ether / stablecoin / btc / other), the Stage, providers, purposes and the complete risk assessment. The risks endpoint returns just the risk rosette for a rollup with a sentiment tally. The summary endpoint aggregates the whole ecosystem — total TVS, project count and the distribution by Stage and by type. More than a hundred rollups tracked, updated live. Project lookup is by slug (arbitrum, base, optimism, zksync-era, scroll, linea, starknet).

api.oanor.com/l2beat-api

Live economic-activity metrics for Ethereum Layer-2 rollups — Arbitrum, Base, Optimism, zkSync, Linea, Scroll, Polygon and more — powered by the public growthepie.xyz feed, no key, nothing stored. This is the L2 fundamentals cut: not a single chain's block or gas data, but how much each rollup is actually used and what it earns. The chains endpoint lists the tracked rollups. The chain endpoint returns one rollup's latest metrics: daily active addresses, transaction count, fees paid, on-chain profit (the fees it keeps after paying Ethereum to post its data), median transaction cost, stablecoin supply, total value locked, market cap and fully-diluted valuation. The metric endpoint ranks every rollup by a single metric, so you can see at a glance which L2 leads on users, fees or profit and how the scaling race is shifting. Track the real adoption and economics of the rollup ecosystem as live JSON. This is the L2 activity / economics cut — distinct from the per-chain on-chain (block and gas) APIs and the TVL-only APIs in the catalogue.

api.oanor.com/growthepie-api

Live Ethereum monetary-policy data — the total ETH supply, how much of it is being created versus destroyed, and the EIP-1559 fee burn that can make ether deflationary (the "ultrasound money" thesis), powered by the public ultrasound.money feed, no key, nothing stored. The supply endpoint returns the current circulating ETH supply and its net change over the last 5 minutes, hour, day, week and month — a negative change means more ETH was burned than issued, i.e. net deflation. The burn endpoint returns the ETH destroyed by the base-fee burn over each window in both ETH and USD, the live burn rate in ETH per minute and the current deflationary streak. The basefee endpoint returns the current base fee per gas, the blob base fee and the ETH price. The leaderboard endpoint ranks the apps and contracts burning the most ETH right now. Track ETH issuance, the burn and whether ether is deflating as live JSON. This is the ETH supply / issuance / burn cut — distinct from the gas-fee, on-chain and price APIs in the catalogue.

api.oanor.com/ethburn-api

Live data on the public companies that hold Bitcoin and Ethereum on their balance sheets, from the public CoinGecko feed. Rank every public company by how much of the coin it holds, with current and entry value, average entry price, country and share of total supply; get the aggregate corporate holdings, USD value and market-cap dominance; find a specific holder by name, ticker or country; and compare Bitcoin and Ethereum corporate treasuries side by side. The corporate crypto-treasury layer — distinct from price and exchange feeds: it answers who holds how much, and what they paid. Live, with a short 60-second upstream cache.

api.oanor.com/cryptotreasury-api

Live cross-chain bridge data from Across, one of the largest intent-based bridges, which moves USDC, ETH, WBTC and other assets between Ethereum and its rollups (Arbitrum, Base, Optimism, Polygon, zkSync, Linea, Blast, Scroll and more) using a relayer network and a single unified liquidity pool. The quote endpoint prices a bridge transfer — the relayer capital fee, gas fee, LP fee, total fee, the amount received and the estimated fill time. The routes endpoint lists every supported bridge route (origin chain, destination chain, token). The limits endpoint returns the min and max bridgeable amount for a route. The chains endpoint lists supported chains. Read live from Across, nothing stored. This is Across's own cross-chain bridge fee, route and fill-time layer — distinct from DEX, lending, staking and price feeds.

api.oanor.com/across-api

Live data from Balancer, a leading multi-chain decentralised AMM whose programmable liquidity pools (weighted, stable, gyro, boosted) power swaps and yield across Ethereum, Arbitrum, Base, Polygon, Avalanche, Gnosis, Optimism and more. The pools endpoint returns the top pools by TVL on a chain — each with its type, total liquidity, 24h volume and fees, total APR (with a yield/swap/staking breakdown) and constituent tokens. The pool endpoint returns one pool's full state by id, including swap and holder counts and the full APR breakdown. The token endpoint returns a token's live Balancer price plus its symbol, name and decimals. The tokens endpoint searches the token registry by symbol or name. Read live from Balancer, nothing stored. This is Balancer's own programmable-pool AMM, TVL/volume/APR and token-pricing layer — distinct from constant-product DEX feeds, Curve's stableswap and order-book or perps DEX feeds.

api.oanor.com/balancer-api

Live data from Rocket Pool — the leading decentralised Ethereum liquid-staking protocol, where a permissionless network of node operators run validators and users hold rETH, a token that accrues staking rewards (its ETH value rises, no rebase). Served from Rocket Pool's public API as clean JSON, no cache. Read the protocol staking state (ETH staked through Rocket Pool, staking minipools, deposit-pool balance and rETH collateral, plus the Ethereum-wide total staked and validator count); the rETH yield (staking APR, the underlying beacon-chain APR and the ETH price); the RPL token (price in USD and ETH, total staked and supply); and the node-operator counts and commission. Read live from Rocket Pool, nothing cached. This is Rocket Pool's own liquid-staking, rETH-yield, RPL and node-operator layer — distinct from on-chain explorers, DEX/lending/perps feeds and generic price APIs.

api.oanor.com/rocketpool-api

Live NFT collection market data — no key, nothing cached. For any collection it returns the numbers that matter: the floor price in both the chain's native currency and US dollars, the 24-hour floor change, the collection market cap, the 24-hour trading volume and its change, the number of unique owners and the total supply, plus the contract address, the chain and the project's links — Pudgy Penguins floors around 4.3 ETH with thousands of unique owners and a market cap in the tens of millions. The list endpoint pages through the collections that are tracked, and the search endpoint finds a collection by name. It spans every chain NFTs are indexed on — Ethereum, Solana, Polygon and more. This is the collection-floor-and-volume layer for any NFT marketplace, wallet, portfolio or analytics app. Live, served from the public CoinGecko feed, nothing stored. Distinct from token-price and single-chain APIs — this is NFT collection floor prices, market caps and volumes. 4 endpoints.

api.oanor.com/nft-api

Live blockchain transaction, receipt and block lookup, read straight from the chain's public JSON-RPC node — no key, nothing cached. Give it a transaction hash and the transaction endpoint returns the full picture: the sender and recipient, the value moved (in wei and human ETH), the gas limit and gas price, the nonce, the block it landed in, the input-data size, and — by also reading the receipt — whether it succeeded or failed, the gas actually used, the effective gas price, the fee paid in ETH, the number of event logs it emitted, any contract it created and how many confirmations it now has. The receipt endpoint returns just the execution result (status, gas used, logs, contract address). The block endpoint takes a block number or "latest" and returns its timestamp, transaction count, gas used and limit with utilisation, base fee and miner. It works across seven EVM chains — Ethereum, Polygon, BNB Smart Chain, Arbitrum, Optimism, Base and Avalanche — with friendly aliases (eth, matic, bnb, arb, op, avax). This is the explorer-grade transaction layer every wallet, payment processor, dapp and dashboard needs to confirm and inspect on-chain activity. Read live from the chain, nothing stored. Distinct from balance, token-metadata and name-resolution APIs — this is transaction, receipt and block data read directly from the blockchain. 4 endpoints across 7 chains.

api.oanor.com/txlookup-api

Live Ethereum Name Service resolution — the phone book of web3, no key, nothing cached. It turns a human .eth name into the wallet address behind it and back again, and reads the on-chain profile records the owner has set. The resolve endpoint takes a name like vitalik.eth and returns the Ethereum address, the avatar, the primary-name flag, the resolver contract, the content hash (for decentralised websites) and every text record the owner published — Twitter, GitHub, Reddit, Discord, Telegram, email, website and description — plus any multi-chain wallet addresses: vitalik.eth resolves to 0xd8dA…96045 with Twitter @VitalikButerin and GitHub vbuterin. The reverse endpoint does the opposite — give it any Ethereum address and it returns that address's primary ENS name and the same profile, so a bare 0x… becomes a human identity. The records endpoint returns just the profile text records for a name. This is the name-resolution and on-chain-profile layer every wallet, dapp, block explorer, payment and web3 app needs: address to name and name to address, with the owner's verified social links. Live from the Ethereum Name Service, nothing stored. Distinct from raw-RPC and token-metadata APIs — this is ENS naming and profile data. 4 endpoints.

api.oanor.com/ens-api

Live ERC-20 token metadata, read straight off the blockchain. Give it any token contract address and it returns the token's name, symbol, decimals and total supply — both as the raw on-chain integer and as a human-formatted number — by calling the ERC-20 contract directly via the chain's public JSON-RPC node (eth_call), confirming first that the address is really a contract. The USD Coin contract resolves to "USD Coin", symbol USDC, 6 decimals; Wrapped BTC on Polygon to "(PoS) Wrapped BTC", symbol WBTC, 8 decimals. The balance endpoint reads any wallet's holding of any token — pass the token contract and an owner address and it returns the balance raw and formatted with the token's own decimals and symbol. It works across seven EVM chains — Ethereum, Polygon, BNB Smart Chain, Arbitrum, Optimism, Base and Avalanche — with friendly aliases (eth, matic, bnb, arb, op, avax). This is the token-metadata and token-balance layer every wallet, DEX, portfolio tracker, block explorer and DeFi dashboard needs: turn a bare 0x… contract into a named, decimalled token, and resolve any holder's balance, in one call. Read live from the chain, no key on the data source, nothing cached. Distinct from native-coin balance and market-price APIs — this is on-chain ERC-20 contract data read directly from the blockchain. 4 endpoints across 7 chains.

api.oanor.com/tokeninfo-api

Live native-coin balance for any EVM wallet address across the major chains as an API, read straight from each network's public JSON-RPC node. For any 0x address it returns the native balance (in coin units and in wei), the transaction count (nonce), and whether the address is a smart contract. Check one chain, or fan out across every supported chain at once to see where a wallet holds funds — Ethereum, Polygon, BNB Smart Chain, Arbitrum, Optimism, Base and Avalanche. The wallet-balance and address-lookup layer every wallet app, portfolio tracker and dashboard needs. Live, no key, no cache. Distinct from gas-fee and price APIs — this is on-chain address balances.

api.oanor.com/walletbalance-api

Live multi-chain EVM gas-fee oracle — the gas estimate every wallet, bridge and dApp needs — computed straight from each network's public JSON-RPC node. Using EIP-1559 fee history it derives the next block's base fee and slow, standard and fast priority-fee tiers from the recent reward percentiles, and returns per tier the priority fee, the suggested max fee and the resulting total gas price, all in gwei. It also estimates the cost of a transaction — a plain transfer or any gas limit you pass — in the chain's native coin. Supports Ethereum, Polygon, BSC, Arbitrum, Optimism, Base and Avalanche. Live, no key, no cache. Distinct from price, market-cap and on-chain TVL APIs — this is the real-time gas-price layer.

api.oanor.com/gasfees-api

Live EDU Chain on-chain data via Blockscout. EDU Chain is Open Campus' education-focused Ethereum L2; gas and balances are in EDU. Network stats, gas prices, latest blocks, a block by height or hash, address detail with EDU balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/educhain-api

Live Perennial on-chain data via Blockscout. Perennial is a DeFi derivatives Ethereum L2 built on Arbitrum Orbit; gas and balances are in ETH. Network stats, gas prices, latest blocks, a block by height or hash, address detail with ETH balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/perennial-api

Live Orderly on-chain data via Blockscout. Orderly is an omnichain orderbook Ethereum L2 built on the OP Stack; gas and balances are in ETH. Network stats, gas prices, latest blocks, a block by height or hash, address detail with ETH balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/orderly-api

Live Katana on-chain data via Blockscout. Katana is a DeFi-focused Ethereum L2; gas and balances are in ETH. Network stats, gas prices, latest blocks, a block by height or hash, address detail with ETH balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/katana-api

Live Manta Pacific on-chain data via Blockscout. Manta Pacific is a modular Ethereum L2 using Celestia for data availability; gas and balances are in ETH. Network stats, gas prices, latest blocks, a block by height or hash, address detail with ETH balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/manta-api

Live Lumia on-chain data via Blockscout. Lumia is a real-world-asset (RWA) focused Ethereum L2; gas and balances are in LUMIA. Network stats, gas prices, latest blocks, a block by height or hash, address detail with LUMIA balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/lumia-api

Live Hemi on-chain data via Blockscout. Hemi is a modular Layer 2 supernetwork powered by both Bitcoin and Ethereum; gas and balances are in ETH. Network stats, gas prices, latest blocks, a block by height or hash, address detail with ETH balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/hemi-api

Live World Chain on-chain data via Blockscout. World Chain is Worldcoin's Ethereum L2 built on the OP Stack; gas and balances are in ETH. Network stats, gas prices, latest blocks, a block by height or hash, address detail with ETH balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/world-api

Live Ancient8 on-chain data via Blockscout. Ancient8 is a gaming-focused Ethereum L2 built on the OP Stack; gas and balances are in ETH. Network stats, gas prices, latest blocks, a block by height or hash, address detail with ETH balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/ancient8-api

Live Superseed on-chain data via Blockscout. Superseed is an Ethereum L2 built on the OP Stack and part of the Optimism Superchain; gas and balances are in ETH. Network stats, gas prices, latest blocks, a block by height or hash, address detail with ETH balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/superseed-api

Live Corn on-chain data via Blockscout. Corn (Maizenet) is a Bitcoin-backed Ethereum L2; gas and balances are in BTCN. Network stats, gas prices, latest blocks, a block by height or hash, address detail with BTCN balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/corn-api

Live Degen Chain on-chain data via Blockscout. Degen Chain is a Farcaster-community L3 built on Arbitrum Orbit; gas and balances are in DEGEN. Network stats, gas prices, latest blocks, a block by height or hash, address detail with DEGEN balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/degen-api

Live Xai on-chain data via Blockscout. Xai is a gaming-focused Arbitrum-Orbit L3; gas and balances are in XAI. Network stats, gas prices, latest blocks, a block by height or hash, address detail with XAI balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/xai-api

Live Plume on-chain data via Blockscout. Plume is a real-world-asset (RWA) focused Ethereum L2; gas and balances are in PLUME. Network stats, gas prices, latest blocks, a block by height or hash, address detail with PLUME balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/plume-api

Live Lisk on-chain data via Blockscout. Lisk is an Ethereum L2 built on the OP Stack and part of the Optimism Superchain; gas and balances are in ETH. Network stats, gas prices, latest blocks, a block by height or hash, address detail with ETH balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/lisk-api

Live Shape on-chain data via Blockscout. Shape is a creator- and NFT-focused Ethereum L2 built on the OP Stack; gas and balances are in ETH. Network stats, gas prices, latest blocks, a block by height or hash, address detail with ETH balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/shape-api

Live Swellchain on-chain data via Blockscout. Swellchain is a restaking-powered Ethereum L2; gas and balances are in ETH. Network stats, gas prices, latest blocks, a block by height or hash, address detail with ETH balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/swell-api

Live BOB on-chain data via Blockscout. BOB (Build on Bitcoin) is a hybrid Ethereum L2 bridging Bitcoin and Ethereum; gas and balances are in ETH. Network stats, gas prices, latest blocks, a block by height or hash, address detail with ETH balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/bob-api

Live Ink on-chain data via Blockscout. Ink is Kraken's Ethereum L2 built on the OP Stack; gas and balances are in ETH. Network stats, gas prices, latest blocks, a block by height or hash, address detail with ETH balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/ink-api

Live Immutable zkEVM on-chain data via Blockscout. Immutable zkEVM is a gaming-focused Ethereum L2; gas and balances are in IMX. Network stats, gas prices, latest blocks, a block by height or hash, address detail with IMX balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/immutable-api

Live Soneium on-chain data via Blockscout. Soneium is Sony's Ethereum L2 built on the OP Stack; gas and balances are in ETH. Network stats, gas prices, latest blocks, a block by height or hash, address detail with ETH balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/soneium-api

Live Ethereum Classic on-chain data via Blockscout. Ethereum Classic (ETC) is the original proof-of-work Ethereum chain; gas and balances are in ETC. Network stats, gas prices, latest blocks, a block by height or hash, address detail with ETC balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/etc-api

Live Unichain on-chain data via Blockscout. Unichain is Uniswap's Ethereum L2; gas and balances are in ETH. Network stats, gas prices, latest blocks, a block by height or hash, address detail with ETH balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/unichain-api

Live zkSync Era on-chain data as an API, built on the open Blockscout explorer. zkSync Era (chain id 324) is a leading Ethereum zk-rollup Layer-2 by Matter Labs; its native currency is ETH and fees are a fraction of mainnet. Pull network stats (total blocks and transactions, ETH price, live gas), a gas oracle with slow, average and fast prices in gwei, the most recent blocks and full block detail by height or hash. Look up any address for its balance and contract status, any transaction by hash for its value, fee, status, sender and receiver, and any ERC-20 token by contract for its name, symbol, decimals, holders and USD rate. A universal search resolves addresses, tokens, blocks and transactions in one call. Real on-chain data, no key needed upstream. Ideal for zkSync wallets, block explorers, gas trackers, DeFi dashboards and on-chain analytics.

api.oanor.com/zksync-api

Live Celo on-chain data as an API, built on the open Blockscout explorer. Celo (chain id 42220) is a mobile-first, carbon-negative Ethereum-compatible network; its native currency is CELO and it hosts native stablecoins such as cUSD and cEUR. Pull network stats (total blocks and transactions, CELO price, live gas), a gas oracle with slow, average and fast prices in gwei, the most recent blocks and full block detail by height or hash. Look up any address for its balance and contract status, any transaction by hash for its value, fee, status, sender and receiver, and any ERC-20 token by contract for its name, symbol, decimals, holders and USD rate. A universal search resolves addresses, tokens, blocks and transactions in one call. Real on-chain data, no key needed upstream. Ideal for Celo wallets, block explorers, gas trackers, DeFi and stablecoin dashboards and on-chain analytics.

api.oanor.com/celo-api

Live Polygon PoS on-chain data as an API, built on the open Blockscout explorer. Polygon (chain id 137) is one of the most-used Ethereum-compatible networks; its native currency is POL (formerly MATIC) and fees are tiny. Pull network stats (total blocks and transactions, POL price, live gas), a gas oracle with slow, average and fast prices in gwei, the most recent blocks and full block detail by height or hash. Look up any address for its POL balance and contract status, any transaction by hash for its value, fee, status, sender and receiver, and any ERC-20 token by contract for its name, symbol, decimals, holders and USD rate. A universal search resolves addresses, tokens, blocks and transactions in one call. Real on-chain data, no key needed upstream. Ideal for Polygon wallets, block explorers, gas trackers, DeFi and NFT dashboards and on-chain analytics.

api.oanor.com/matic-api

Live Gnosis Chain on-chain data as an API, built on the open Blockscout explorer. Gnosis Chain (chain id 100, formerly xDAI) is a long-running Ethereum-compatible network whose native currency is the xDAI stable token, so gas and balances are denominated in a dollar-pegged coin. Pull network stats (total blocks and transactions, native price, live gas), a gas oracle with slow, average and fast prices in gwei, the most recent blocks and full block detail by height or hash. Look up any address for its balance and contract status, any transaction by hash for its value, fee, status, sender and receiver, and any ERC-20 token by contract for its name, symbol, decimals, holders and USD rate. A universal search resolves addresses, tokens, blocks and transactions in one call. Real on-chain data, no key needed upstream. Ideal for Gnosis wallets, block explorers, gas trackers, DeFi dashboards and on-chain analytics.

api.oanor.com/gnosis-api

Live Arbitrum One on-chain data as an API, built on the open Blockscout explorer. Arbitrum is the largest Ethereum Layer-2 by total value locked (chain id 42161); gas and balances are denominated in ETH and fees are a fraction of mainnet. Pull network stats (total blocks and transactions, ETH price, live gas), a gas oracle with slow, average and fast prices in gwei, the most recent blocks and full block detail by height or hash. Look up any address for its ETH balance and contract status, any transaction by hash for its value, fee, status, sender and receiver, and any ERC-20 token by contract for its name, symbol, decimals, holders and USD rate. A universal search resolves addresses, tokens, blocks and transactions in one call. Real on-chain data, no key needed upstream. Ideal for Arbitrum wallets, block explorers, gas trackers, DeFi dashboards and on-chain analytics.

api.oanor.com/arbitrum-api

Live Base mainnet on-chain data as an API, built on the open Blockscout explorer. Base is Coinbase's Ethereum Layer-2 (chain id 8453), where gas and balances are denominated in ETH and fees are a fraction of mainnet. Pull network stats (total blocks and transactions, ETH price, live gas), a gas oracle with slow, average and fast prices in gwei, the most recent blocks and full block detail by height or hash. Look up any address for its ETH balance and contract status, any transaction by hash for its value, fee, status, sender and receiver, and any ERC-20 token by contract for its name, symbol, decimals, holders and USD rate. Real on-chain data, no key needed upstream. Ideal for Base wallets, block explorers, gas trackers, DeFi and on-chain analytics.

api.oanor.com/base-api

Live Ethereum mainnet on-chain data as an API, built on the open Blockscout explorer — a different layer from market-price feeds. Pull network stats (total blocks and transactions, ETH price, market cap and live gas usage), a gas oracle with slow, average and fast prices in gwei, the most recent blocks and full block detail by height or hash. Look up any address for its ETH balance, ENS name and contract status, any transaction by hash for its value, fee, status, sender and receiver, and any ERC-20 token by contract for its name, symbol, decimals, holders and USD exchange rate. A universal search resolves addresses, tokens, blocks and transactions in one call. Real on-chain data, no key needed upstream. Ideal for wallets, block explorers, gas trackers, DeFi dashboards and crypto analytics.

api.oanor.com/ethereum-api

Validate cryptocurrency wallet addresses before you send funds or store them. Check an address against a specific coin — Bitcoin (legacy base58check and bech32 SegWit), Ethereum (with EIP-55 checksum), Litecoin, Dogecoin, Bitcoin Cash, XRP, Cardano, Tron, Monero and 100+ others — or let it auto-detect the likely currency across the most popular coins. Optionally restrict to mainnet or testnet. Catches typos, wrong-network mistakes and malformed addresses. Pure local validation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. Built for payment and checkout forms, exchanges and wallets, withdrawal validation and KYT pre-checks. Distinct from blockchain-data and market-price APIs.

api.oanor.com/cryptoaddr-api

Live cryptocurrency market data: prices, top coins & markets, price/OHLC charts, historical snapshots, trending coins, global stats, exchanges and categories.

api.oanor.com/crypto-api