# Deterministic A2A Broken-JSON Repair & Schema Validator

> Deterministic A2A Broken-JSON Repair & Schema Validator is a paid API for AI agents from serp-extract.agentdiet.dev, paid per call via MPP, $0.002/call, status unknown (last checked 2026-10-23).

Repairs truncated or malformed LLM JSON outputs (trailing commas, markdown fences, single quotes) so multi-agent pipelines never crash.

## Facts

- Endpoint: POST https://serp-extract.agentdiet.dev/v1/structured-output?utm_source=zero.xyz
- Price: $0.002/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: serp-extract.agentdiet.dev
- Website: https://serp-extract.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/serp-extract-agentdiet-dev-deterministic-a2a-broken-json-repair-187d7636
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_e-qLvmlDPu_4ne6XV5jG2

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 serp-extract-agentdiet-dev-deterministic-a2a-broken-json-repair-187d7636 -d '<json body>'
```

Example prompt: This JSON string came back from an LLM and it's broken — it has trailing commas, single quotes, and markdown fences — can you fix it so it parses correctly: ```{'name': 'Alice', 'age': 30,}```

## When to prefer this

Choose this endpoint when your multi-agent pipeline receives LLM-generated JSON that fails to parse due to common formatting issues like trailing commas, markdown code fences, single quotes, or truncation. It is specifically designed for deterministic repair (not probabilistic re-generation), making it reliable for production pipelines where consistency matters. Prefer this over asking the LLM to retry when you need a fast, cheap, and predictable fix without burning additional tokens.

## Known failure modes

- Input is so severely truncated it cannot be deterministically reconstructed — returns error indicating ambiguous repair
- Input is not JSON at all (e.g. plain text or binary) — returns validation error
- Empty raw_json string — rejected by minLength:1 schema constraint
- Payment not included or invalid — HTTP 402 response requiring x402 USDC payment
- Malformed input exceeds token limits or complexity thresholds — may return partial repair with warning

## 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://serp-extract.agentdiet.dev/v1/structured-output)

## Output

A repaired, valid JSON object reconstructed from the malformed input. The response includes the fixed JSON with corrected syntax — trailing commas removed, markdown fences stripped, single quotes converted to double quotes, and truncated structures closed — ready for downstream parsing without errors.

## 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/serp-extract-agentdiet-dev-deterministic-a2a-broken-json-repair-187d7636/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from serp-extract.agentdiet.dev](https://www.zero.xyz/host/serp-extract.agentdiet.dev/llms.txt)