# Agent JSON Reliability - Evidence Freshness Check

> Agent JSON Reliability - Evidence Freshness Check is a paid API for AI agents from agent-json-reliability.onrender.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-01).

Checks and returns freshness evidence/status for JSON reliability and validation operations performed by AI agents.

## Facts

- Endpoint: POST https://agent-json-reliability.onrender.com/v1/evidence/freshness?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-json-reliability-evidence-freshness-check-06e38a4e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EPOYHfBX4uX08i1qyj6KH

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 agent-json-reliability-evidence-freshness-check-06e38a4e -d '<json body>'
```

Example prompt: Can you check whether the evidence from my last JSON validation is still fresh and hasn't gone stale?

## When to prefer this

Use this endpoint when an AI agent needs to verify that previously computed JSON validation or repair evidence is still current before relying on cached results, particularly in long-running or multi-step pipelines where JSON integrity must be periodically re-confirmed.

## Known failure modes

- Missing or invalid request body returns a 4xx error
- Expired or unknown evidence reference returns ok:false
- Service unavailability on Render hosting causes 5xx timeouts
- Payment not processed correctly via x402 results in 402 rejection

## 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 an 'ok' boolean indicating whether the evidence freshness check succeeded, potentially including timestamp or staleness metadata about prior JSON validation or repair operations.

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-json-reliability-evidence-freshness-check-06e38a4e/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)