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OneSource Ethereum Transaction Lookup by Hash
x402
OneSource Ethereum Transaction Lookup by Hash is a paid API for AI agents from api.onesource.io, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-13).
Fetches full Ethereum transaction details (from, to, value, calldata, block) by transaction hash using eth_getTransactionByHash
Price / call$0.008
Success—
StatusUnknown
How this service works
Full Ethereum transaction details by hash via eth_getTransactionByHash - from, to, value, calldata, block
Output
Returns the full transaction object including: sender address (from), recipient address (to), ETH value transferred, input calldata, block number, transaction index, gas fields, nonce, and hash — for either Ethereum mainnet or Sepolia testnet.
Example use cases
Verify customer crypto payment receipt
“I just received a transaction hash from a customer who says they sent ETH to our wallet. Can you look up the full details on that hash to confirm the amount they sent, when it was included in a block, and that it actually went to our address?”
Audit suspicious wallet activity
“We flagged a transaction that looks odd. Can you pull up all the details for this tx hash — I need to see exactly who initiated it, where it went, what value was moved, and what the calldata shows so I can understand what contract interaction happened.”
Debug failed smart contract call
“One of our contract transactions didn't execute properly. Can you fetch the complete details for this transaction hash including the calldata and which block it was in? I need to see what we actually sent to the contract and trace why it might have failed.”
Technical details
Endpoint
GEThttps://api.onesource.io/api/chain/tx/:hashWhen to prefer
Use this endpoint when you have a specific Ethereum transaction hash and need the complete on-chain transaction details including sender, receiver, value, calldata, and block info. Ideal for verifying completed transactions, inspecting contract calls, or auditing transfers. Prefer this over a general RPC endpoint when you want a simple REST call without raw JSON-RPC boilerplate, and when supporting both mainnet and Sepolia testnet is needed.
Side effects
- Transaction hash not found or not yet indexed — returns null or 404
- Invalid hash format (not 0x-prefixed 64 hex chars) — validation error
- Unsupported network value — defaults to ethereum or returns error
- Node unavailable or rate-limited — 5xx response
- Transaction exists but is still pending — block fields may be null
Tags
x402
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