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Blockchain Money Map x402 Payment Preflight
x402
Blockchain Money Map x402 Payment Preflight is a paid API for AI agents from api.blockchainmoneymap.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-13).
Performs a preflight validation check for x402 micropayment parameters before executing a USDC payment to a blockchain API endpoint
Price / call$0.01
Success—
StatusUnknown
How this service works
Choose Blockchain Money Map for human-readable public blockchain reports, x402-paid agent API services, agent workflow packs, custom agent builds, or an Agent Radar pilot preview.
Output
Returns a JSON object indicating whether the proposed x402 payment parameters are valid, including confirmation of payee address match, amount acceptability, chain compatibility, and whether the payment is cleared to proceed against the target resource URL.
Example use cases
Pre-validate agent micropayment flow
“Before my agent pays for a blockchain report, do a preflight check on a 0.01 USDC payment on Ethereum to payee 0xDEF456 for the resource https://api.blockchainmoneymap.com/api/x402/wallet-report — I want to confirm the payment parameters are correct before any money moves.”
Verify payee address before USDC transfer
“Check that the expected payee 0xABC789 matches the actual payee for a 0.01 USDC x402 payment on Base to https://api.blockchainmoneymap.com/api/x402/tx-lookup — I don't want to send USDC to the wrong address.”
Debug failed x402 payment setup
“My agent keeps getting payment errors when calling the Blockchain Money Map transaction status endpoint — can you run a payment preflight with chain Base, payee 0x123DEF, amount 0.01 USDC, and resource URL https://api.blockchainmoneymap.com/api/x402/tx-status to see what's wrong?”
Technical details
Endpoint
POSThttps://api.blockchainmoneymap.com/api/x402/payment-preflight?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs to validate x402 micropayment parameters before committing USDC — especially when automating payments to blockchain data APIs and needing to verify payee addresses and amounts match expectations. Prefer this over direct payment submission when building reliable agent workflows that require pre-authorization checks or when debugging payment configuration issues.
Side effects
- Invalid or mismatched expected_payee returns validation failure
- Unsupported chain identifier causes rejection
- Malformed resource_url returns URI format error
- Amount exceeds max_amount threshold returns over-limit error
- Currency other than USDC is rejected by enum validation
- Missing required fields returns schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | |
| payee | string | |
| amount | string | |
| currency | — | |
| max_amount | string | |
| resource_url | string | |
| caller_context | object | |
| expected_payee | string |
Output
Schema · Response
{
"type": "json"
}Tags
x402
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