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EVM Transaction Lookup by Hash
x402
EVM Transaction Lookup by Hash is a paid API for AI agents from flat-rate-llm.kikoribera03.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Fetches merged transaction details and receipt (from, to, value, gas used, status, block) for a given transaction hash on EVM-compatible chains in a single call.
Price / call$0.005
Success—
StatusUnknown
How this service works
60 paid endpoints with no metering, no API key and no account. Each endpoint has one flat price per call, whatever the size of the request: LLM completions with automatic failover across several large models, read-only EVM tooling over Base, Ethereum, Polygon, Arbitrum and Optimism, and pure crypto utilities that touch no network.
Output
A JSON object containing the destination address (to), sender address (from), transaction status (success or failure), gas used as a number, and block number where the transaction was confirmed.
Example use cases
Verify payment confirmation on-chain
“I just sent a payment on Base — the tx hash is 0x4f2a9...b81c. Can you check whether it went through and who received it?”
Debug a failed smart contract call
“My Polygon transaction 0x9d3f1...a22e failed — can you pull the full details including gas used and status so I can figure out what went wrong?”
Audit transaction sender on Arbitrum
“Can you look up Arbitrum transaction 0x7c8b2...d91f and confirm the from and to addresses and what block it was included in?”
Technical details
Endpoint
POSThttps://flat-rate-llm.kikoribera03.workers.dev/v1/evm/txWhen to prefer
Use this endpoint when you need both transaction details and receipt data in a single call without managing two separate RPC requests. Ideal for agents that need to verify transaction finality, check success/failure status, or audit sender/receiver without running their own Ethereum node or managing API keys. Preferred over raw RPC when working across multiple EVM chains (Base, Ethereum, Polygon, Arbitrum, Optimism) from a single interface.
Side effects
- Transaction hash not found on the specified chain — returns empty or error response
- Wrong chain specified — transaction exists on a different network and will not be found
- Malformed transaction hash — invalid hex string causes a 400 or validation error
- Chain not supported — only base, ethereum, polygon, arbitrum, optimism are valid chain values
- Transaction pending — not yet mined, so receipt fields may be null or absent
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| hashrequired | string | Transaction hash. |
| chain | string | base | ethereum | polygon | arbitrum | optimism. |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| to | string | |
| from | string | |
| status | string | |
| gasUsed | number | |
| blockNumber | number |
Tags
x402
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