# Reliable JSON x402 Preflight Check

> Reliable JSON x402 Preflight Check is a paid API for AI agents from agent-json-reliability.onrender.com, paid per call via x402, $0.0075/call, status unknown (last checked 2026-10-02).

Checks x402 payment requirements and preflight conditions before submitting a paid JSON repair/validation request

## Facts

- Endpoint: POST https://agent-json-reliability.onrender.com/v1/x402/preflight?utm_source=zero.xyz
- Price: $0.0075/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/reliable-json-x402-preflight-check-7d4629e9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eDviSHnetv7WSRvHHp_dT

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 reliable-json-x402-preflight-check-7d4629e9 -d '<json body>'
```

Example prompt: Before I submit my broken JSON for repair and pay, can you run a preflight check on the Reliable JSON for AI Agents service so I know what payment and request requirements I need to meet?

## When to prefer this

Use this preflight endpoint before making a paid POST /v1/json/reliable call to confirm x402 payment parameters are correct and the service is live, avoiding wasted payment attempts. Prefer this when integrating the Reliable JSON service into a new agent pipeline or debugging payment flow issues.

## Known failure modes

- Service unavailable on Render.com free tier (cold start delays or spin-down)
- x402 payment configuration mismatch returning non-200 status
- Network timeout if the Render instance is sleeping
- Unexpected response format if the service has been updated

## How this service works

Deterministic JSON repair and JSON Schema validation for AI agents. Free MCP, inspect, validate, repair. Paid POST /v1/json/reliable 0.003 USDC via x402 on Base.

## Output

Returns a simple JSON object with an 'ok' boolean field confirming that preflight conditions are met and the service is reachable; used to validate x402 payment setup and endpoint availability before committing to a paid repair/validation call.

## Response schema (JSON Schema)

```json
{
 "example": {
  "ok": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/reliable-json-x402-preflight-check-7d4629e9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent-json-reliability.onrender.com](https://www.zero.xyz/host/agent-json-reliability.onrender.com/llms.txt)