# Deterministic A2A Broken-JSON Repair & Schema Validator

> Deterministic A2A Broken-JSON Repair & Schema Validator is a paid API for AI agents from workflows.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://workflows.agentdiet.dev/v1/llm-json-schema-healer?utm_source=zero.xyz
- Price: $0.002/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: workflows.agentdiet.dev
- Website: https://workflows.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/workflows-agentdiet-dev-deterministic-a2a-broken-json-repair-schema-d95926c4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YZDrukrlsj6Me4PH0gsYT

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 workflows-agentdiet-dev-deterministic-a2a-broken-json-repair-schema-d95926c4
```

Example prompt: This LLM response came back as broken JSON with trailing commas and markdown fences — can you repair it so I can parse it? Here's the raw string: ```{"name": "Alice", "age": 30,}```

## When to prefer this

Choose this endpoint when your multi-agent pipeline receives LLM-generated JSON that contains common syntax errors such as trailing commas, markdown code fences, single-quoted strings, or truncation artifacts, and you need a deterministic (non-LLM) repair rather than asking another model to re-generate the output. Particularly useful in high-throughput pipelines where reliability and cost predictability matter, and where re-prompting the LLM would be expensive or slow.

## Known failure modes

- Input is so severely malformed that deterministic repair is impossible — returns error indicating irrecoverable structure
- Input is not JSON at all (e.g. plain text or binary) — returns parsing failure
- Truncation is too deep to infer missing values — may return partially repaired object or error
- raw_json parameter missing or empty — returns 400-level validation 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://workflows.agentdiet.dev/v1/llm-json-schema-healer)

## Output

A repaired, schema-valid JSON object reconstructed from the malformed input, with syntax errors corrected (trailing commas removed, markdown fences stripped, single quotes converted to double quotes, truncated structures closed), returned as a structured JSON response ready for downstream parsing.

## 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/workflows-agentdiet-dev-deterministic-a2a-broken-json-repair-schema-d95926c4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from workflows.agentdiet.dev](https://www.zero.xyz/host/workflows.agentdiet.dev/llms.txt)