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Doormat Capital x402lint /conform Endpoint
x402
Doormat Capital x402lint /conform Endpoint is a paid API for AI agents from x402lint.sebastiaan-ba3.workers.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-20).
Checks whether a given URL conforms to the x402 payment protocol specification, running full conformance validation including manifest cross-check and on-chain USDC asset verification on Base.
Price / call$0.05
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 conformance report with a pass/fail result, total number of checks run, number of checks passed, and whether the endpoint was reachable. The /conform path performs the deep-lint variant, including manifest cross-check and on-chain USDC asset verification on Base.
Example use cases
Pre-launch x402 endpoint audit
“Before I go live, can you run a full deep-lint conformance check on my x402 payment API at https://myapp.com/api/premium to make sure it passes all 402 protocol checks, including manifest and on-chain asset verification?”
Debugging a broken x402 integration
“My x402 endpoint at https://api.myservice.com/data keeps failing payments — can you run a conformance check on it so I can see exactly which x402 protocol checks it's failing?”
Vetting a third-party x402 API
“I'm thinking about integrating with the x402 endpoint at https://partner.io/paid-resource — can you do a deep conformance lint on it to confirm it's properly implementing the x402 spec before I build against it?”
Technical details
Endpoint
POSThttps://x402lint.sebastiaan-ba3.workers.dev/conform?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need authoritative x402 protocol conformance validation — especially for deep checks that include manifest cross-verification and on-chain USDC asset confirmation on Base. Use it over simple HTTP testing tools when you need protocol-level correctness assurance before launching or integrating with an x402-enabled API.
Side effects
- Target URL is unreachable — reachable field returns false and checks may not complete
- Target endpoint does not return a valid 402 response — conformance checks fail
- Payment not provided or invalid tx hash — /deep-lint returns 402 challenge requiring USDC payment on Base
- Malformed input URL — API returns error before running checks
- On-chain verification fails if Base network is congested or RPC is unavailable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | — | |
| output | — |
Tags
x402
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