# 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 2026-10-21).

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

## Facts

- Endpoint: GET https://onchain-risk.agentdiet.dev/v1/json-validator?utm_source=zero.xyz
- Price: $0.002/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- 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-b043b4ef
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rWiW3e0jfEtb9iiUG-39E

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-b043b4ef
```

Example prompt: This JSON from my LLM keeps crashing my pipeline — can you repair it? Here it is: ```{name: 'Alice', age: 30, hobbies: ['reading', 'coding',}```

## When to prefer this

Choose this endpoint when you need a fast, deterministic (non-AI) JSON fixer specifically for LLM-generated or pipeline-produced broken JSON. It is ideal for multi-agent workflows where reliability and consistency matter more than probabilistic correction, and when you cannot afford to have downstream agents crash on malformed JSON inputs.

## Known failure modes

- Input is so severely malformed that deterministic repair is impossible — returns error with explanation
- JSON is beyond repair due to missing structural context from truncation
- Network or payment (x402) errors if the $0.002 micropayment is not completed
- Empty raw_json input rejected with validation error

## 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/json-validator)

## Output

Returns a repaired, valid JSON object with the malformed input corrected — trailing commas removed, markdown fences stripped, single quotes converted to double quotes, and truncation patched where possible, enabling downstream parsing without crashes.

## 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-b043b4ef/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)