# Deterministic A2A Broken-JSON Repair & Schema Validator

> Deterministic A2A Broken-JSON Repair & Schema Validator is a paid API for AI agents from onchain-risk.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://onchain-risk.agentdiet.dev/v1/malformed-json-healer?utm_source=zero.xyz
- Price: $0.002/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: onchain-risk.agentdiet.dev
- Website: https://onchain-risk.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/onchain-risk-agentdiet-dev-deterministic-a2a-broken-json-repair-bdaa0a3e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PDTZdJbfnO3gvhtJJKQD3

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 onchain-risk-agentdiet-dev-deterministic-a2a-broken-json-repair-bdaa0a3e -d '<json body>'
```

Example prompt: This JSON string came back from the LLM and it won't parse — it has trailing commas and markdown code fences wrapped around it. Can you repair it and give me back clean, valid JSON? Here's the raw string: ```{"name": "Alice", "age": 30,}```

## When to prefer this

Choose this endpoint when you need deterministic, rule-based JSON repair rather than probabilistic LLM re-generation — ideal for multi-agent pipelines where consistency and reproducibility matter. Best for fixing known LLM output artifacts like trailing commas, markdown fences, and single-quoted keys. Prefer over asking a second LLM to reformat JSON when you want guaranteed structural fixes without stochastic variation.

## Known failure modes

- JSON too severely malformed to recover deterministically — returns error indicating irreparable input
- Empty or whitespace-only input rejected with validation error
- Input that is not JSON-like at all may fail schema repair with an error response
- Network or payment authorization failure returns HTTP 402 or 5xx

## 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://onchain-risk.agentdiet.dev/v1/malformed-json-healer)

## Output

A repaired, syntactically valid JSON object with all common LLM output corruption fixed — trailing commas removed, markdown fences stripped, single quotes converted to double quotes, and truncated structures completed 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/onchain-risk-agentdiet-dev-deterministic-a2a-broken-json-repair-bdaa0a3e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from onchain-risk.agentdiet.dev](https://www.zero.xyz/host/onchain-risk.agentdiet.dev/llms.txt)