# 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 2026-10-21).

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

## Facts

- Endpoint: GET https://alpha-stream.agentdiet.dev/v1/schema-repair?utm_source=zero.xyz
- Price: $0.002/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- 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-872ca666
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sRC0pirNAY3clLlboaTR-

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-872ca666
```

Example prompt: Can you fix this broken JSON that came back from the LLM — it has trailing commas and markdown code fences wrapped around it: ```{"name": "Alice", "age": 30,}```

## When to prefer this

Choose this endpoint when your multi-agent pipeline receives malformed, truncated, or markdown-wrapped JSON from an LLM and needs deterministic repair before downstream parsing — especially when you need reliability guarantees (no crashes) over probabilistic re-prompting. Prefer this over asking the LLM to re-generate when you need fast, cheap, deterministic fixes to common JSON syntax errors.

## Known failure modes

- Input string is so severely truncated it cannot be deterministically repaired — returns error or best-effort partial object
- Input is not JSON-like at all (plain prose) — may return error or empty object
- Schema validation failure if repaired output still doesn't conform to expected structure
- HTTP 402 payment required if x402 payment header not included
- Query parameter encoding issues for complex nested JSON strings passed via GET

## 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/schema-repair)

## Output

A repaired, well-formed JSON object parsed from the originally malformed or truncated input string, with common LLM output errors such as trailing commas, markdown fences, and single quotes resolved deterministically.

## 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-872ca666/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)