Agent Paywire URL Protocol Verification

x402

Agent Paywire URL Protocol Verification is a paid API for AI agents from api.agentpaywire.com, paid per call via x402, $1/call, status unknown (last checked 2026-10-29).

Verifies whether a public HTTP/HTTPS URL correctly implements L402, x402, or MPP payment protocols and returns a pass/fail report

Price / call$1

Seller volume →—

Success—

StatusUnknown

How this service works

Verify a public http or https provider URL for L402, x402, or MPP. POST JSON with required url and optional protocol (l402, x402, or mpp), library_id, and contact. Returns a report id and passed or failed. One verification is 1.00 USDC. Payment does not affect library inclusion or ranking.

Output

A JSON object containing a unique report ID (UUID), the verified URL, a status of 'passed' or 'failed', the detected protocol (l402, x402, or mpp), a link to the full report at api.agentpaywire.com, and a paid_verification boolean confirming the check was paid.

Example use cases

Pre-listing protocol compliance check

“Before I submit my API to a directory, can you verify that https://api.myservice.com/v1/data supports x402 and tell me if it passes?”

Third-party vendor due diligence

“I'm considering integrating with this provider — can you verify whether https://api.thirdparty.com/search actually implements L402 correctly and get me a report?”

MPP support audit for internal API

“We just deployed our new endpoint at https://api.internal.io/v1/query — can you run a verification to confirm it properly supports MPP?”

Technical details

Endpoint

POSThttps://api.agentpaywire.com/v1/verify?utm_source=zero.xyz

When to prefer

Use this endpoint when you need a paid, authoritative, third-party verification report confirming whether a specific URL correctly implements L402, x402, or MPP payment protocols — especially before listing an API in a directory, auditing a vendor, or validating your own deployment. Prefer this over the free probe endpoint when you need a persistent, referenceable report ID and official pass/fail status rather than a quick ad-hoc check.

Side effects

URL is unreachable or returns non-2xx — verification likely fails with status 'failed'
URL does not expose any supported protocol header — returns status 'failed' with protocol null or undetected
Invalid or malformed URL input — returns 400-level error
Payment not processed — request rejected before verification runs
Rate limiting or prepaid call exhaustion — request rejected with payment-required error
protocol enum value not matching any detected protocol — may return failed status even if another protocol is present

Input

Schema · Request body

Field	Type	Description
url	string	Public http or https URL to verify. Required.
contact	string	Optional. At most 200 characters.
protocol	string	Optional. l402, x402, or mpp. Omit to report every protocol the probe finds.
library_id	string	Optional. 1 to 80 lowercase letters, digits, or hyphens.

Output

Schema · Response

{
  "type": "json",
  "example": {
    "id": "00000000-0000-4000-8000-000000000001",
    "url": "https://api.example.com/v1/search",
    "status": "passed",
    "protocol": "x402",
    "report_url": "https://api.agentpaywire.com/v1/verify/00000000-0000-4000-8000-000000000001",
    "paid_verification": true
  }
}

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How this service works

Output

Example use cases

Pre-listing protocol compliance check

“Before I submit my API to a directory, can you verify that https://api.myservice.com/v1/data supports x402 and tell me if it passes?”

Third-party vendor due diligence

“I'm considering integrating with this provider — can you verify whether https://api.thirdparty.com/search actually implements L402 correctly and get me a report?”

MPP support audit for internal API

“We just deployed our new endpoint at https://api.internal.io/v1/query — can you run a verification to confirm it properly supports MPP?”

Technical details

Endpoint

POSThttps://api.agentpaywire.com/v1/verify?utm_source=zero.xyz

When to prefer

Side effects

URL is unreachable or returns non-2xx — verification likely fails with status 'failed'
URL does not expose any supported protocol header — returns status 'failed' with protocol null or undetected
Invalid or malformed URL input — returns 400-level error
Payment not processed — request rejected before verification runs
Rate limiting or prepaid call exhaustion — request rejected with payment-required error
protocol enum value not matching any detected protocol — may return failed status even if another protocol is present

Input

Schema · Request body

Field	Type	Description
url	string	Public http or https URL to verify. Required.
contact	string	Optional. At most 200 characters.
protocol	string	Optional. l402, x402, or mpp. Omit to report every protocol the probe finds.
library_id	string	Optional. 1 to 80 lowercase letters, digits, or hyphens.

Output

Schema · Response

{
  "type": "json",
  "example": {
    "id": "00000000-0000-4000-8000-000000000001",
    "url": "https://api.example.com/v1/search",
    "status": "passed",
    "protocol": "x402",
    "report_url": "https://api.agentpaywire.com/v1/verify/00000000-0000-4000-8000-000000000001",
    "paid_verification": true
  }
}