#rollup

The Tezos Layer-2 smart-rollup layer, live from the public TzKT indexer — no key, nothing cached. Smart rollups are Tezos's enshrined Layer-2: optimistic rollups — including Etherlink, the EVM-compatible L2 — that post state commitments back to Tezos and are secured by on-chain refutation games. The existing Tezos readers cover the base chain, the bakers and governance, but not the rollup layer; this opens it. List the smart rollups ranked by inbox level, each with its address, name, PVM kind (wasm), staker counts and commitment tallies. Look up a single rollup by address in full, with its cemented, pending and refuted commitments and refutation-game activity. And read the recent rollup commitments — the periodic state attestations — with their committed state hash, inbox level, tick count and how many stakers backed each. The Layer-2 layer for Tezos wallets, rollup operators, Etherlink users and analytics. Live from api.tzkt.io.

api.oanor.com/tezosrollups-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

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 on-chain data for Taiko — a based-rollup Ethereum Layer 2 — via its public Blockscout explorer (no wallet, no key). The stats endpoint returns chain-wide totals (blocks, transactions, addresses, average block time, gas used); gas gives the current gas-price oracle (slow/average/fast). Blocks lists the latest blocks, and a single block resolves by height or by hash with its transaction count, gas, miner and timestamp. The address endpoint returns any account's ETH balance, nonce, contract flag and token holdings; transaction resolves a tx by hash with its from/to, value in ETH, fee, status and block. The token endpoint returns an ERC-20 token's metadata (name, symbol, decimals, total supply, holders) by contract address, and search runs a universal lookup across addresses, tokens, blocks and transactions. Gas, balances, values and fees are denominated in ETH, the native coin. Real on-chain data straight from the explorer, refreshed every call — no key. 9 endpoints. For multi-chain coverage combine with the other oanor chain APIs (Ethereum, Base, Arbitrum and more).

api.oanor.com/taiko-api