# Deterministic A2A Broken-JSON Repair & Schema Validator

> Deterministic A2A Broken-JSON Repair & Schema Validator is a paid API for AI agents from defi-yield.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://defi-yield.agentdiet.dev/v1/json-fix?utm_source=zero.xyz
- Price: $0.002/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: defi-yield.agentdiet.dev
- Website: https://defi-yield.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/defi-yield-agentdiet-dev-deterministic-a2a-broken-json-repair-schema-cd7f3aba
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gtG20GU9rxRVd5TNnKUv9

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 defi-yield-agentdiet-dev-deterministic-a2a-broken-json-repair-schema-cd7f3aba
```

Example prompt: This JSON string from the LLM output is broken — it has trailing commas and markdown fences wrapping it. Can you clean and repair it so it parses correctly: ```{"name": "Alice", "score": 42,}```?

## When to prefer this

Choose this endpoint when your multi-agent pipeline receives JSON from an LLM or scraper that fails to parse due to common syntax issues like trailing commas, markdown fences, or single quotes. It is deterministic (not generative), making it reliable for automated pipelines where consistency matters. Prefer it over writing custom regex-based fixers when you need a hosted, pay-per-call solution compatible with x402/MCP agent infrastructure.

## Known failure modes

- Input is so severely malformed that deterministic repair is impossible, returning an error or best-effort partial result
- Empty or whitespace-only raw_json input rejected with validation error
- Input that is not JSON-like at all (e.g. plain prose) may produce unexpected output
- Very large or deeply nested truncated JSON may have ambiguous repair outcomes

## 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://defi-yield.agentdiet.dev/v1/json-fix)

## Output

A repaired, valid JSON object that has been cleaned of common malformations including trailing commas, markdown code fences, single quotes instead of double quotes, and truncation issues — ready for programmatic parsing without errors.

## 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/defi-yield-agentdiet-dev-deterministic-a2a-broken-json-repair-schema-cd7f3aba/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from defi-yield.agentdiet.dev](https://www.zero.xyz/host/defi-yield.agentdiet.dev/llms.txt)