# Deterministic A2A Broken-JSON Repair & Schema Validator

> Deterministic A2A Broken-JSON Repair & Schema Validator is a paid API for AI agents from alpha-stream.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://alpha-stream.agentdiet.dev/v1/json-repair?utm_source=zero.xyz
- Price: $0.002/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: alpha-stream.agentdiet.dev
- Website: https://alpha-stream.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/alpha-stream-agentdiet-dev-deterministic-a2a-broken-json-repair-ad00ffe3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6yDDyKAxrYZPHLNEy1VjF

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 alpha-stream-agentdiet-dev-deterministic-a2a-broken-json-repair-ad00ffe3 -d '<json body>'
```

Example prompt: This JSON string from the LLM is broken — it has trailing commas and markdown fences wrapping it — can you repair it so it's valid JSON I can actually use: ```{"name": "Alice", "age": 30,}```

## When to prefer this

Choose this endpoint when your multi-agent pipeline receives JSON from an LLM that fails to parse due to common LLM formatting issues like trailing commas, markdown fences, single quotes, or truncation. Prefer this over manual regex-based fixes when you need deterministic, reliable repair across all common LLM JSON failure modes in an automated pipeline context.

## Known failure modes

- Input is so severely malformed that deterministic repair cannot infer intent — returns error indicating unrecoverable JSON
- Input is empty or whitespace-only — returns validation error on raw_json field
- Input is already valid JSON — returns it unchanged (no-op)
- Network timeout or service unavailability — standard HTTP 5xx 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://alpha-stream.agentdiet.dev/v1/json-repair)

## Output

A repaired, valid JSON object with all syntax errors corrected — trailing commas removed, markdown fences stripped, single quotes converted to double quotes, and truncated structures closed — ready to be parsed by any standard JSON parser.

## 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/alpha-stream-agentdiet-dev-deterministic-a2a-broken-json-repair-ad00ffe3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from alpha-stream.agentdiet.dev](https://www.zero.xyz/host/alpha-stream.agentdiet.dev/llms.txt)