# 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/schema-repair?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-d1083d3b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qlKOIeVpdyHibTmi0NdZ3

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-d1083d3b -d '<json body>'
```

Example prompt: This JSON string came back from an LLM and it's broken — it has trailing commas, markdown code fences, and single quotes — can you repair it into valid JSON so the pipeline doesn't crash? Here's the raw output: ```json {'name': 'Alice', 'age': 30, }```

## When to prefer this

Choose this endpoint when your multi-agent pipeline receives JSON from LLMs that frequently produce trailing commas, markdown code fences (```json blocks), single-quoted keys, or truncated structures, and you need a deterministic (non-LLM) repair pass to prevent downstream crashes. Prefer it over asking another LLM to fix JSON, since deterministic repair is faster, cheaper, and more reliable for structural defects. Best suited for automated pipelines where JSON quality cannot be guaranteed at the source.

## Known failure modes

- Input JSON is so severely malformed that deterministic repair is impossible — returns error indicating unrecoverable structure
- Empty or whitespace-only raw_json input — returns validation error for minLength constraint
- Input is not JSON at all (e.g. plain prose) — repair may fail or return unexpected output
- Payment failure via x402 — returns HTTP 402 before processing
- Network timeout for very large JSON strings

## 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/schema-repair)

## Output

A repaired, valid JSON object with all common LLM output defects corrected — trailing commas removed, markdown fences stripped, single quotes normalized to double quotes, truncated structures closed, and the result returned as a parseable JSON object ready for downstream agent consumption.

## 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-d1083d3b/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)