# Deterministic A2A Broken-JSON Repair & Schema Validator

> Deterministic A2A Broken-JSON Repair & Schema Validator is a paid API for AI agents from polymarket-odds.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://polymarket-odds.agentdiet.dev/v1/json-normalizer?utm_source=zero.xyz
- Price: $0.002/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: polymarket-odds.agentdiet.dev
- Website: https://polymarket-odds.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/polymarket-odds-agentdiet-dev-deterministic-a2a-broken-json-repair-2bdc8fa4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kD4lnAN_0Fiy-vHE-ZL2D

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 polymarket-odds-agentdiet-dev-deterministic-a2a-broken-json-repair-2bdc8fa4
```

Example prompt: The LLM just returned this broken JSON with trailing commas and markdown fences — can you repair it so it's valid and parseable: ```{'name': 'Alice', 'score': 42,}```?

## When to prefer this

Choose this endpoint when your multi-agent pipeline receives LLM-generated JSON that may contain common formatting errors such as trailing commas, markdown code fences, single quotes instead of double quotes, or truncated output. It is especially useful as a pre-processing step before schema validation or downstream agent calls, where invalid JSON would cause crashes. Prefer it over writing custom JSON repair logic when you need a deterministic, hosted solution that handles the most common LLM output malformations reliably.

## Known failure modes

- Input JSON is so severely malformed it cannot be deterministically repaired — returns error
- Input string is completely empty or null — rejected at schema validation
- Non-JSON input (e.g. plain text or binary) passed as raw_json — may return error or best-effort result
- Ambiguous repair paths where multiple valid JSON structures are plausible — may return unexpected structure
- Payment failure via x402 — returns HTTP 402 with payment required details

## 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://polymarket-odds.agentdiet.dev/v1/json-normalizer)

## Output

A JSON object containing the repaired, normalized, and valid JSON derived from the malformed input string, suitable for direct use in downstream agent or pipeline steps.

## 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/polymarket-odds-agentdiet-dev-deterministic-a2a-broken-json-repair-2bdc8fa4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from polymarket-odds.agentdiet.dev](https://www.zero.xyz/host/polymarket-odds.agentdiet.dev/llms.txt)