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Transaction Lookup
x402
Transaction Lookup is a paid API for AI agents from chain.tollkit.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-11).
Looks up on-chain transaction details by hash on Base, Ethereum, or Solana, paid per-call via x402 in USDC with no account required.
Price / call$0.002
Success—
StatusUnknown
How this service works
Wallet balances, tokens, transactions and prices on Base, Ethereum and Solana. Other Tollkit tools are described at: https://extract.tollkit.dev/openapi.json, https://attest.tollkit.dev/openapi.json, https://web.tollkit.dev/openapi.json, https://data.tollkit.dev/openapi.json.
Output
Returns detailed on-chain transaction data for the specified hash or signature, including confirmation status, block number, sender and receiver addresses, value transferred, gas used, and other chain-specific transaction fields.
Example use cases
Verify DeFi swap completion
“I just did a token swap on Base and want to confirm it went through — can you look up transaction 0x9f3c2a1b8e7d6c5b4a3d2e1f0a9b8c7d6e5f4a3b2c1d0e9f8a7b6c5d4e3f2a1b on Base and tell me what happened?”
Audit suspicious wallet activity
“Someone sent me a Solana transaction signature 4uQeVj5tqViQh7yWWGStvkEG1Adsx9jYjHqvXAFGFvXMFpqxJvHNHqVuPZKgqwLmZU — can you pull up what that transaction actually did?”
Confirm cross-chain payment received
“I'm waiting on an Ethereum payment — can you check transaction 0xb2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9b0c1d2e3f4a5b6c7d8e9f0a1b2c3 on Ethereum and tell me whether it's confirmed and how much was transferred?”
Technical details
Endpoint
POSThttps://chain.tollkit.dev/chain/tx?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to fetch details of a specific transaction by hash on Base, Ethereum, or Solana without setting up an account or managing API keys — ideal for agents that need pay-as-you-go on-chain data access via x402. Prefer this over block explorer scraping or RPC node calls when you want a simple, structured JSON response for a single transaction lookup with per-call billing in USDC.
Side effects
- Invalid transaction hash format returns a validation error
- Transaction hash not found on the specified chain returns a not-found error
- Wrong chain specified for a valid hash (e.g. Base hash queried on Ethereum) returns no result
- Network connectivity issues with the RPC provider cause timeout errors
- Payment failure via x402 prevents the call from executing
- Unconfirmed or pending transactions may return partial data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| hash | string | Transaction hash, or base58 signature on Solana. |
| chain | string | Which chain to read: "base" (default), "ethereum" or "solana". |
Output
Schema · Response
{
"type": "json",
"example": {
"to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"from": "0xE74817F4cDC15844314812B2271276E64e890fAE",
"hash": "0x066e2ba9d128c084503c093d79150d20860e141af309ebe8680b4509108522cc",
"chain": "base",
"status": "success",
"fee_eth": "0.0000004787541",
"gas_used": "86262",
"method_id": "0xe3ee160e",
"timestamp": "2026-10-02T01:02:41.000Z",
"value_eth": "0",
"value_wei": "0",
"block_number": 52056807,
"explorer_url": "https://basescan.org/tx/0x066e2ba9d128c084503c093d79150d20860e141af309ebe8680b4509108522cc",
"token_transfers": [
{
"to": "0xBbfCE2D320dE6aB328Ba93A771c531ebFC9cE704",
"from": "0xec2aBD3EDA89BeD90124736e317e847D5fb6d034",
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "0.01",
"symbol": "USDC",
"amount_raw": "10000"
}
],
"contract_created": null,
"token_transfers_total": 1
}
}Tags
x402
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