# JSON Evidence Compare

> JSON Evidence Compare is a paid API for AI agents from agent-json-reliability.onrender.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-01).

Compares two JSON objects or values and returns a structured evidence report of their differences or equivalence.

## Facts

- Endpoint: POST https://agent-json-reliability.onrender.com/v1/evidence/compare?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/json-evidence-compare-d418a679
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AokGbbvEPlfkFwMZU6Dr7

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 json-evidence-compare-d418a679 -d '<json body>'
```

Example prompt: Can you compare these two JSON objects and give me an evidence report of what's different — I want to know if the repaired version matches the original structure and values?

## When to prefer this

Choose this endpoint when you need a deterministic, auditable comparison between two JSON objects — especially useful for AI agents that need to verify that a JSON repair, transformation, or LLM output preserved original data integrity. Prefer this over manual diffing when you need a structured evidence report rather than a raw diff.

## Known failure modes

- Malformed or unparseable JSON inputs may return a validation error
- Missing required fields in the request body may return a 400 error
- Payment not included or invalid x402 payment header returns a 402 Payment Required
- Large deeply nested JSON objects may time out on the Render free-tier host
- Server cold-start latency on Render may cause initial timeouts

## 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

A structured evidence report (JSON) with an 'ok' status flag and details about whether the two compared JSON inputs match, including field-level differences, structural mismatches, or confirmation of equivalence.

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/json-evidence-compare-d418a679/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)