# Deterministic A2A Broken-JSON Repair & Schema Validator

> Deterministic A2A Broken-JSON Repair & Schema Validator is a paid API for AI agents from mcp-compiler.agentdiet.dev, paid per call via MPP, $0.002/call, status unknown (last checked 2026-10-21).

Repairs malformed, truncated, or markdown-wrapped LLM JSON outputs deterministically so multi-agent pipelines never crash.

## Facts

- Endpoint: GET https://mcp-compiler.agentdiet.dev/v1/json-validator?utm_source=zero.xyz
- Price: $0.002/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: mcp-compiler.agentdiet.dev
- Website: https://mcp-compiler.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/mcp-compiler-agentdiet-dev-deterministic-a2a-broken-json-repair-def08f8c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JLXWCudy23ApnO-dTdCJd

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 mcp-compiler-agentdiet-dev-deterministic-a2a-broken-json-repair-def08f8c
```

Example prompt: This LLM response came back with broken JSON — trailing commas, markdown code fences, and single quotes everywhere — can you run it through the JSON repair service and give me back something I can actually parse?

## When to prefer this

Choose this endpoint when an LLM or agent in your pipeline produces JSON that fails to parse due to common formatting issues like trailing commas, markdown code fences, single quotes, or truncation. It is ideal for hardening multi-agent workflows that rely on structured LLM outputs, especially when you need a deterministic (non-AI) fix rather than re-prompting the model.

## Known failure modes

- Input JSON is too severely corrupted or truncated to deterministically repair — returns error or partial result
- Empty or whitespace-only raw_json input — returns validation error
- Non-JSON content passed as input (e.g. plain text or binary) — may return unrecoverable error
- Rate limit or payment failure via x402 — returns 402 Payment Required

## How this service works

Repairs truncated or malformed LLM JSON outputs (trailing commas, markdown fences, single quotes) so multi-agent pipelines never crash. (Live x402 v2, IETF MPP & MCP endpoint at https://mcp-compiler.agentdiet.dev/v1/json-validator)

## Output

Returns a repaired, valid JSON object derived from the malformed input — with trailing commas removed, markdown fences stripped, single quotes normalized to double quotes, and truncation corrected where possible.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "raw_json"
 ],
 "properties": {
  "raw_json": {
   "type": "string",
   "minLength": 1,
   "description": "Malformed, truncated, or markdown-wrapped JSON string to deterministically repair"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mcp-compiler-agentdiet-dev-deterministic-a2a-broken-json-repair-def08f8c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-compiler.agentdiet.dev](https://www.zero.xyz/host/mcp-compiler.agentdiet.dev/llms.txt)