# 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 2026-10-21).

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

## Facts

- Endpoint: GET https://serp-extract.agentdiet.dev/v1/repair?utm_source=zero.xyz
- Price: $0.002/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- 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-6e5dc902
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WGyQGGPXFwoPvKoEwOdoq

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-6e5dc902
```

Example prompt: This LLM output is broken JSON — it has trailing commas, single quotes, and a markdown code fence wrapping it. Can you repair it so I can use it in my pipeline? Here it is: ```{name: 'Alice', age: 30,}```

## When to prefer this

Choose this endpoint when your multi-agent or LLM pipeline receives JSON that fails standard JSON.parse() due to common LLM output artifacts: trailing commas, single quotes, markdown code fences, or token-limit truncation. Prefer this over manual regex fixes or custom parsers when you need a deterministic, reliable repair step that works across all these failure modes in one call. Ideal for agentic workflows where downstream steps depend on structured data and any JSON parse failure would halt execution.

## Known failure modes

- Input is so severely truncated that deterministic repair is impossible — returns error or best-effort partial object
- Input is not JSON at all (e.g. plain text prose) — repair fails or returns unexpected structure
- Extremely nested or deeply malformed JSON may exceed repair heuristics — partial repair returned
- Empty raw_json parameter — returns validation error
- Ambiguous truncation points may result in incorrect field inference

## 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/repair)

## Output

Returns a repaired, valid JSON object parsed from the malformed input. The response contains the corrected JSON structure with all syntax errors resolved — trailing commas removed, markdown fences stripped, single quotes converted to double quotes, and truncated structures closed where possible.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "raw_json"
 ],
 "properties": {
  "limit": {
   "type": "integer",
   "default": 20,
   "maximum": 100,
   "minimum": 1,
   "description": "Maximum number of items to return per page (1-100)"
  },
  "cursor": {
   "type": "string",
   "description": "Opaque pagination cursor for fetching the next page"
  },
  "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-6e5dc902/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)