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Ontario Protocol x402 Endpoint Checker
x402
Ontario Protocol x402 Endpoint Checker is a paid API for AI agents from ontarioprotocol.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-13).
Tests and validates x402-compliant API endpoints for HTTP 402 responses, manifests, pricing, and public readiness before an agent pays
Price / call$0.1
Success—
StatusUnknown
How this service works
Find the first reason agents are not buying your x402 API. Test HTTP 402 readiness, Coinbase Bazaar retrieval, buyer-task fit, and agent payment policy free.
Output
A JSON object containing a listing record with an endpoint ID and associated validation results covering HTTP 402 compliance, manifest structure, pricing metadata, and public discovery readiness status.
Example use cases
Pre-integration x402 compliance check
“I'm about to have my agent start paying for calls to https://api.partner.com/insights — can you check with Ontario Protocol first to confirm their x402 setup is correct, the manifest is valid, and pricing is properly declared?”
Provider readiness audit before launch
“I just built an x402-monetized endpoint at https://myapp.com/api/premium and want to make sure it passes all the public readiness checks — HTTP 402 response, manifest, and discovery — before I tell agent builders to start using it.”
Debugging broken x402 payment flow
“My x402 endpoint seems to be rejecting agent payments and I'm not sure why — can you run an Ontario Protocol probe on https://myservice.com/api/v1/report to see what's misconfigured in the 402 response or manifest?”
Technical details
Endpoint
POSThttps://ontarioprotocol.com/api/x402/list-agentWhen to prefer
Choose this endpoint when you need to verify that an x402-compliant API is correctly configured before an agent attempts to pay and call it, or before a provider publishes their endpoint for agent consumption. It is specifically suited for x402 protocol validation rather than general API health checks or payment processing.
Side effects
- Target URL is unreachable or returns non-402 status — validation fails with error details
- Malformed manifest at the target endpoint — report flags specific schema violations
- Endpoint not yet indexed for discovery — readiness report shows discovery as incomplete
- Invalid or missing pricing declaration — pricing check returns failure with guidance
- Rate limit or upstream timeout — call returns error without a listing result
Output
Schema · Response
{
"type": "json",
"example": {
"listing": {
"id": "agent_example"
}
}
}Tags
x402
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