# Delx Commerce X402 Timeout Check

> Delx Commerce X402 Timeout Check is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).

Validates whether a given timestamp pair satisfies the X402 payment protocol timeout window, returning lead seconds and pass/fail status.

## Facts

- Endpoint: POST https://commerce.delx.ai/api/v1/x402/x402-timeout-check?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-commerce-x402-timeout-check-1b243b4a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LeYUgLu5aQRPLdCDl4eBr

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 delx-commerce-x402-timeout-check-1b243b4a -d '<json body>'
```

Example prompt: Check whether the current time (epoch 1720000000) is still within the x402 payment window that expires at epoch 1720000600, with a minimum lead of 30 seconds.

## When to prefer this

Use this endpoint when your agent needs a verifiable, auditable check of x402 payment timeout compliance — especially when you need cryptographic evidence (input SHA256) that the check was performed without data retention or external calls. Prefer this over local timestamp math when auditability, tamper-evidence, or compliance with the x402 protocol specification matters.

## Known failure modes

- Missing required fields (now_epoch, expires_epoch, minimum_lead_seconds) result in validation error
- Non-integer epoch values cause type error
- Epoch values far outside realistic range may cause overflow behavior
- Payment failure or network error on the x402 micropayment layer prevents the call from completing

## How this service works

Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.

## Output

Returns a JSON object containing the computed lead_seconds between now and expiry, a within_window boolean indicating pass or fail, the minimum and maximum lead second bounds, a top-level status field ('pass' or 'fail'), and an evidence block with a SHA256 hash of the input and confirmation that no data was retained and no external calls were made.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "now_epoch": {
   "type": "integer",
   "description": "Now Epoch supplied to X402 Timeout Check; used only for this bounded calculation and processed in memory without retention."
  },
  "expires_epoch": {
   "type": "integer",
   "description": "Expires Epoch supplied to X402 Timeout Check; used only for this bounded calculation and processed in memory without retention."
  },
  "minimum_lead_seconds": {
   "type": "integer",
   "description": "Minimum Lead Seconds supplied to X402 Timeout Check; used only for this bounded calculation and processed in memory without retention."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "lead_seconds": 300,
   "within_window": true,
   "maximum_lead_seconds": 9223372036854776000,
   "minimum_lead_seconds": 30
  },
  "schema": "delx/util-x402-timeout-check/v1",
  "status": "pass",
  "evidence": {
   "retained": false,
   "input_sha256": "1199b0cc2c5f6a7de14c3b13bef25ae15b4a34f6c7c5ba48af83021cc95cbfac",
   "external_calls": 0
  },
  "operation": "delivery_contract:x402_timeout_check"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-commerce-x402-timeout-check-1b243b4a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from commerce.delx.ai](https://www.zero.xyz/host/commerce.delx.ai/llms.txt)