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Transaction Evidence Brief
x402
Transaction Evidence Brief is a paid API for AI agents from transaction-evidence-brief-2026.bowu365.chatgpt.site, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-16).
Retrieves deterministic on-chain evidence for a Base blockchain transaction by hash, suitable for agent audit trails.
Price / call$0.05
Success—
StatusUnknown
How this service works
Deterministic Base transaction evidence for agents and audit trails.
Output
Returns a JSON object containing the chain name ('Base'), transaction status ('success' or failure state), and the canonical transaction hash, providing deterministic proof of the transaction's on-chain outcome.
Example use cases
Payment confirmation for agent workflow
“Check whether Base transaction 0x1a2b3c4d5e6f7890abcdef1234567890abcdef1234567890abcdef1234567890ab succeeded — I need to confirm the payment before releasing the next step in my pipeline.”
Audit trail evidence for compliance
“Pull the on-chain evidence for Base transaction 0x904a17eb77255e1208eea43f3519ec6e5c04c417a21453bb239e1a6de0c8a797 so I can attach it to our compliance report showing the transfer completed.”
Debugging a failed crypto payment
“I sent a Base transaction with hash 0xdeadbeef1234567890abcdef1234567890abcdef1234567890abcdef12345678 but I'm not sure if it went through — can you look it up and tell me the status?”
Technical details
Endpoint
GEThttps://transaction-evidence-brief-2026.bowu365.chatgpt.site/api/v1/tx-brief/paidWhen to prefer
Choose this endpoint when you need lightweight, deterministic on-chain evidence for a specific Base transaction hash — especially in agent workflows that require audit trails or payment confirmation before proceeding. Prefer it over full block explorers when you only need status and hash confirmation without full transaction decode.
Side effects
- Invalid transaction hash format (not matching 0x[64 hex chars]) returns a validation error
- Transaction hash not found on Base returns a not-found or null status
- Network or RPC timeouts may cause intermittent failures
- Payment not received (402) if the x402 micropayment header is missing or insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "Base",
"status": "success",
"transactionHash": "0x904a17eb77255e1208eea43f3519ec6e5c04c417a21453bb239e1a6de0c8a797"
}
}Tags
x402
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