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Doormat Capital x402lint Deep Lint API
x402
Doormat Capital x402lint Deep Lint API is a paid API for AI agents from x402lint.sebastiaan-ba3.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).
Performs deep conformance checking of an x402-compliant endpoint, including manifest cross-check and on-chain asset verification, paid in USDC on Base via x402.
Price / call$0.01
Success—
StatusUnknown
How this service works
x402 endpoint conformance checker. Free /lint works standalone; /deep-lint adds manifest cross-check and on-chain asset verification, paid in USDC on Base (x402). Pay by sending USDC to the address in the 402 challenge, then retry with header X-PAYMENT-TX: <tx hash>. Introductory pricing through 17 Oct 2026 on /deep-lint (0.03 USDC normally) — see the 402 response for the current amount.
Output
Returns a JSON object with an 'ok' boolean indicating overall conformance, a numeric score (0-100), and a 'findings' array listing specific conformance issues or violations discovered during the deep lint, manifest cross-check, and on-chain asset verification.
Example use cases
Pre-launch x402 API compliance audit
“Before I go live, can you run a deep lint on my x402 payment endpoint at https://api.myapp.com/premium-data and tell me the conformance score and any findings I need to fix?”
Debugging failed x402 payment flow
“My x402 endpoint at https://payments.myservice.io/gated-content is rejecting payments even though the setup looks right — can you do a deep lint including the manifest and on-chain check to find what's wrong?”
Third-party x402 integration verification
“I'm integrating with a vendor's x402 API at https://vendor.example.com/paid-endpoint — can you deep lint it to verify it actually conforms to the spec and the on-chain assets check out before I build against it?”
Technical details
Endpoint
POSThttps://x402lint.sebastiaan-ba3.workers.dev/deep-lint?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a comprehensive x402 conformance audit that goes beyond basic syntax checking — specifically when you need manifest cross-validation and on-chain asset verification on Base. Prefer the free /lint endpoint for quick syntactic checks; use /deep-lint when preparing for production deployment or debugging complex x402 integration issues where on-chain state matters.
Side effects
- Missing or invalid X-PAYMENT-TX header returns 402 with payment challenge
- Unreachable target URL returns an error finding
- Malformed URL input causes validation failure
- On-chain asset verification failure if Base network is unreachable
- Target endpoint not implementing x402 at all results in low score and multiple findings
- Payment transaction hash not yet confirmed on-chain causes verification to fail
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | — | |
| output | — |
Tags
x402
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