# Doormat Capital x402lint /conform Endpoint

> 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.

## Facts

- Endpoint: POST https://x402lint.sebastiaan-ba3.workers.dev/conform?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/doormat-capital-x402lint-conform-endpoint-6211a33c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8dvsMHVjNGh29IekritXm

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability doormat-capital-x402lint-conform-endpoint-6211a33c -d '<json body>'
```

Example prompt: Can you run a deep conformance check on my x402 endpoint at https://example.com/paid-endpoint to see if it passes all the x402 protocol checks including the manifest and on-chain USDC verification on Base?

## When to prefer this

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.

## Known failure modes

- 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

## 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.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "properties": {
    "queryParams": {
     "url": "https://example.com/paid-endpoint"
    }
   }
  },
  "output": {
   "properties": {
    "example": {
     "pass": true,
     "total": 7,
     "passed": 7,
     "reachable": true
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/doormat-capital-x402lint-conform-endpoint-6211a33c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402lint.sebastiaan-ba3.workers.dev](https://www.zero.xyz/host/x402lint.sebastiaan-ba3.workers.dev/llms.txt)