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chain.openverbs.com EVM Transaction Lookup
x402
chain.openverbs.com EVM Transaction Lookup is a paid API for AI agents from chain.openverbs.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-30).
Fetches live on-chain status and full details of an EVM transaction by its hash, including success/failure, value, gas, and block info
Price / call$0.003
Success—
StatusUnknown
Output
Returns a JSON object with found:true/false; if found, includes transaction hash, chain, status (success/failed/pending), from address, to address, value in wei and ether, nonce, block number, gas used, effective gas price, and optionally a contractAddress if the transaction created a contract.
Example use cases
Confirm DeFi swap transaction outcome
“I just submitted a swap on Uniswap on the Base chain — the tx hash is 0xabc123...def456. Can you check whether it went through, how much gas it used, and what block it was mined in?”
Debug failed contract deployment
“I tried deploying a contract on Arbitrum and I'm not sure if it worked. Hash is 0x7f9fade1c0d57a7af66ab4ead79fade1c0d57a7af66ab4ead7c2c2eb7b11a91385. Can you check if the deployment succeeded and give me the contract address if it did?”
Verify Polygon payment receipt
“A customer says they sent payment on Polygon — their tx hash is 0x2c624232cdd221771294dfbb310aca000a0df6ac8b66b696d90ef06fdefb64a3. Can you confirm the transaction succeeded, how much was sent in ETH, and when it was confirmed?”
Technical details
Endpoint
POSThttps://chain.openverbs.com/v1/tx?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need live, authoritative on-chain transaction data for EVM-compatible chains (Ethereum, Base, Arbitrum, Optimism, Polygon) and need status, value, gas details, and block info in a single call. It has automatic RPC fallback for reliability. Prefer it over block explorers when you need machine-readable structured output rather than a human UI, and over general-purpose Web3 libraries when you want a simple HTTP API with no wallet/node infrastructure.
Side effects
- Unknown or invalid hash returns found:false with no additional data
- Malformed hash (not matching 0x[64 hex chars] pattern) triggers a validation error
- Querying a hash on the wrong chain returns found:false
- Network or RPC provider outages may delay or fail responses, though automatic endpoint fallback is attempted
- Pending transactions may return status:pending with incomplete block/gas data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| hash | string | 32-byte transaction hash. |
| chain | string | EVM chain to query. One of: ethereum, base, arbitrum, optimism, polygon. Default "ethereum". |
Tags
x402
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