# Reliable JSON Metadata Endpoint

> Reliable JSON Metadata Endpoint is a paid API for AI agents from agent-json-reliability.onrender.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-02).

Returns metadata about the Reliable JSON service for AI agents, including available endpoints, pricing, and capabilities.

## Facts

- Endpoint: POST https://agent-json-reliability.onrender.com/v1/web/metadata?utm_source=zero.xyz
- Price: $0.003/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-metadata-endpoint-21473c29
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PTPl7Mr8b_I5a8zV3x7gP

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-metadata-endpoint-21473c29 -d '<json body>'
```

Example prompt: Can you pull up the metadata for the Reliable JSON service so I can see what endpoints are available and how much they cost?

## When to prefer this

Use this endpoint when an agent needs to discover or describe the Reliable JSON service before invoking its core repair or validation endpoints — effectively a service-discovery or introspection call rather than a data-processing call.

## Known failure modes

- Service unavailable on free Render tier (cold start delay or spin-down)
- Malformed POST body may return 400
- Rate limiting or payment required errors if endpoint shifts to paid tier
- Incomplete metadata if service description is not fully populated

## 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 JSON object with service metadata, likely including available endpoint paths, descriptions, pricing tiers, and capability flags (e.g. {ok: true} with additional detail about the service).

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/reliable-json-metadata-endpoint-21473c29/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)