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AgentResolver — x402 Payment Preflight & PayTo Verification
x402
AgentResolver — x402 Payment Preflight & PayTo Verification is a paid API for AI agents from agentresolver.vercel.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-14).
Verifies an x402-protected endpoint before payment by checking the live payTo address, USDC quote, network, asset, resource binding, TLS, and endpoint safety.
Price / call$0.05
Success—
StatusUnknown
How this service works
Continuously check whether AI agents can discover, call and pay your API, MCP server or x402 service. Free live checks and GitHub Action monitoring.
Output
Returns a structured report including: validity of the payTo address, current USDC quote, network (Base or Solana), asset type, resource binding confirmation, TLS certificate status, and an overall endpoint safety assessment — allowing an agent to decide whether it is safe to proceed with payment.
Example use cases
Safe x402 payment before agent purchase
“I'm about to have my agent call a paid x402 API that charges 0.001 USDC on Base — can you verify the payTo address, check the network and asset are correct, and confirm TLS looks good before we send any money?”
Detect fraudulent x402 payTo address
“This x402 endpoint I found is asking for payment but something feels off — can you do a preflight check on it to see if the payTo wallet is legitimate and the resource binding matches what they claim?”
Audit x402 Solana endpoint configuration
“We're integrating a new x402-gated data service that runs on Solana — please verify its payment configuration, including the USDC quote, the payTo address, and whether the endpoint passes safety checks, before we wire it into our agent workflow.”
Technical details
Endpoint
GEThttps://agentresolver.vercel.app/api/provider-launch-check?utm_source=zero.xyzWhen to prefer
Use this endpoint whenever an AI agent is about to pay an x402-protected resource and needs to confirm the payment details are legitimate before committing funds. It is especially valuable when integrating unknown or third-party x402 APIs, detecting potential payment fraud, or auditing x402 configurations across Base and Solana networks. Prefer this over blind payment when safety, correctness of payTo address, or USDC quote accuracy is important.
Side effects
- Invalid or unreachable x402 endpoint URL returns an error or empty result
- PayTo address fails liveness check, flagged as invalid or unresolvable
- TLS certificate is expired or missing, endpoint flagged as unsafe
- Network or asset mismatch detected between expected and actual x402 headers
- Endpoint does not return valid x402 payment headers, verification cannot proceed
- Service itself unavailable or returns 5xx, preflight result indeterminate
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {}
}Tags
x402
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Zero review prompt (fires after every successful call)
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