the402 endpoint detail

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agent-card-validator-mcp.mtree.workers.dev wellknowns lint

https://agent-card-validator-mcp.mtree.workers.dev/v1/wellknowns/lint

payable

Paid agent card and well-known validator route for autonomous agents. Returns JSON with provenance, route-specific evidence, and machine-readable fields. Price 0.03 USDC on Base via x402. Demo/preview: https://agent-card-validator-mcp.mtree.workers.dev/demo/lint. Contact: https://agent-card-validator-mcp.mtree.workers.dev/contact.

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.03
Network
base
Pay to
0x1664530DC2A1CA350B1dbaD1Fc1F1a70c90fe4de
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
293 ms
Payment options
1 usable of 1
Last checked
2026-08-10T09:12:33.832Z (1d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fagent-card-validator-mcp.mtree.workers.dev%2Fv1%2Fwellknowns%2Flint"