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x402 Bazaar — Base Transaction Decoder
x402
x402 Bazaar — Base Transaction Decoder is a paid API for AI agents from api.relai.fi, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Accepts a Base blockchain transaction hash and returns a structured summary including from/to addresses, ETH value, status, gas used, block number, method selector, and nonce — fetched directly from Base RPC.
Price / call$0.01
Success—
StatusUnknown
How this service works
Provide a Base transaction hash and get a structured summary: from/to, ETH value, status, gas used, block, method selector, and nonce — straight from Base RPC. Paid via x402: $0.01 in USDC on Base (eip155:8453) to 0x973a31858f4d2125f48c880542da11a2796f12d6. Returns 402 with payment requirements; pay and retry.
Output
A structured JSON object containing: from address, to address, ETH value transferred, transaction status (success/fail), gas used, block number, method selector (4-byte function signature), and nonce — all sourced directly from Base RPC.
Example use cases
Example prompt
“Can you decode Base transaction 0x4a3f...c9d2 for me and tell me the sender, receiver, ETH value, gas used, status, and what method was called?”
Technical details
Endpoint
POSThttps://api.relai.fi/relay/1782567677091/api/x402/tx-decodeWhen to prefer
Use this endpoint when you need quick, structured on-chain transaction details from the Base network without running your own RPC node. Ideal for agents that need to verify or summarize a specific Base transaction as part of a workflow, and that support the x402 micropayment protocol for per-call billing at $0.01 USDC.
Side effects
- Invalid or malformed transaction hash returns an error
- Transaction hash not found on Base network returns not-found error
- Payment not provided or insufficient results in 402 Payment Required with USDC payment instructions
- Network issues with Base RPC may cause timeout or partial response
- Transaction from a different chain (e.g. Ethereum mainnet) will not resolve correctly
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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