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API · /txlookup-api

Transaction Lookup API

healthy 3,771 Subscribers

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.

#transaction #blockchain #ethereum #web3 #explorer #receipt #crypto
api.oanor.com/txlookup-api
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Machine-readable spec so AI agents can integrate this API.

/api/txlookup-api/openapi.json
/api/txlookup-api/llms.txt

Discovery: GET /api/index.json lists every API.

Transaction Lookup API — live data on the oanor API marketplace

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
114 ms
Server probes · 24h
Subscribers
3,771
active
Total calls
80
last 7 days
status Full status page → · 16 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 10,500 calls / month
  • 3 requests / second
  • Hard cap (429 above quota, no overage)
  • 10,500 calls/month
  • 3 req/sec
  • Transaction, receipt & block lookup
  • 7 EVM chains
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Starter

€9.50 /month

  • 135,000 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 135,000 calls/month
  • 8 req/sec
  • Status, fee, gas, logs & confirmations
  • Email support
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Pro

€24.50 /month

  • 640,000 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • 640,000 calls/month
  • 15 req/sec
  • Wallet, payment & dapp pipelines
  • Priority support
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Scale

€59.00 /month

  • 3,200,000 calls / month
  • 30 requests / second
  • Hard cap (429 above quota, no overage)
  • 3,200,000 calls/month
  • 30 req/sec
  • Explorer & monitoring scale
  • Dedicated SLA
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Solana Transaction API

Decode any Solana transaction by its signature, live from public Solana RPC — no key. Where a signatures list just tells you a transaction happened, this tells you what it did: the fee and fee payer, success or failure with the on-chain error, the slot and block time, compute units consumed, the parsed instructions and full program log, and — most usefully — the actual value that moved, decoded into SOL balance changes and SPL-token balance changes per account. A dedicated transfers endpoint extracts just the money movements, and a status endpoint gives a fast confirmation check (processed / confirmed / finalized) for payment flows. Call any endpoint without a signature and it returns a fresh live example transaction. The transaction-decoding layer every Solana wallet, explorer, payment processor and trading bot needs. Live from the chain; short cache only.

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Live EVM on-chain data for Meter (chain id 82) — the HotStuff-BFT proof-of-stake Layer-1 whose native gas token is MTR — served directly from public EVM JSON-RPC nodes with multi-node failover. The status endpoint returns the chain and network id, the latest block height and the node client version. The block endpoint returns a block by number (or the latest) with its hash, parent hash, timestamp, transaction count, gas used and gas limit, miner and size. The gas endpoint returns the current gas price in both wei and gwei. The balance endpoint returns the MTR balance and outgoing transaction count for any address, converted from base wei (18 decimals) into whole MTR with exact big-integer scaling. Every figure is read live from the chain over JSON-RPC — nothing bundled or modelled — behind a short server-side cache with keep-warm so the feed stays fast and fresh. Ideal for explorers, wallet and dashboard tooling, gas trackers, address monitors and analytics apps across the Meter ecosystem. Live keyless upstream. 5 endpoints.

api.oanor.com/meter-api

 Songbird API — oanor API marketplace

Songbird API

Live EVM on-chain data for Songbird (chain id 19) — the canary network of the Flare blockchain, whose native token is SGB — served directly from public C-chain JSON-RPC nodes with multi-node failover. The status endpoint returns the chain and network id, the latest block height and the node client version. The block endpoint returns a block by number (or the latest) with its hash, parent hash, timestamp, transaction count, gas used and gas limit, miner and size. The gas endpoint returns the current gas price in both wei and gwei. The balance endpoint returns the SGB balance and outgoing transaction count for any address, converted from base wei (18 decimals) into whole SGB with exact big-integer scaling. Every figure is read live from the chain over JSON-RPC — nothing bundled or modelled — behind a short server-side cache with keep-warm so the feed stays fast and fresh. Ideal for explorers, wallet and dashboard tooling, gas trackers, address monitors and analytics apps across the Flare and Songbird ecosystem. Live keyless upstream. 5 endpoints.

api.oanor.com/songbird-api

 Sophon Chain API — oanor API marketplace

Sophon Chain API

Real-time on-chain data for Sophon (chain-id 50104), a ZK Layer-2 built on the zkSync Elastic Chain stack and focused on consumer and entertainment apps, where gas is paid in the native SOPH token. The status endpoint returns the chain id, network id, latest block height, native symbol and node client version so you can confirm the chain is live and synced. The block endpoint returns a block by decimal or 0x-hex height — or the latest block when no height is given — with its hash, parent hash, timestamp (raw and ISO), transaction count, gas used and limit, base fee and miner. The gas endpoint returns the current gas price in both wei and gwei at the latest block. The balance endpoint returns the native SOPH balance (in wei and human-readable units) and the transaction count (nonce) for any 0x address. The meta endpoint documents the chain id, decimals and ecosystem. Reads a live Sophon JSON-RPC node directly, so values are current to the latest block. Live, nothing stored. 5 endpoints. This serves native-coin and chain data; for ERC-20 token balances or contract calls use a dedicated token/contract API.

api.oanor.com/sophon-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Transaction Lookup API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Transaction Lookup API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Transaction Lookup API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does Transaction Lookup API cost?
Transaction Lookup API has a free tier with 100 calls / month. Paid plans start at €9.50 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is Transaction Lookup API GDPR-compliant?
All requests to Transaction Lookup API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/txlookup-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/txlookup-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/txlookup-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/txlookup-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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