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Deterministic A2A Broken-JSON Repair & Schema Validator
Deterministic A2A Broken-JSON Repair & Schema Validator is a paid API for AI agents from json-repair.agentdiet.dev, paid per call via MPP, $0.002000/call, status unknown (last checked 2026-10-28).
Deterministically repairs malformed, truncated, or markdown-wrapped JSON strings from LLM outputs so multi-agent pipelines never crash on bad JSON.
Price / call$0.002000
Success—
StatusUnknown
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://json-repair.agentdiet.dev/.well-known/agent-card.json)
Output
A repaired, syntactically valid JSON object or string with trailing commas removed, markdown fences stripped, single quotes converted to double quotes, and truncations closed — ready for downstream parsing and consumption by agent pipelines.
Example use cases
LLM output sanitization in agent pipeline
“The LLM just returned this JSON with a trailing comma and markdown code fences and my pipeline is crashing — can you fix it so it parses cleanly? Here's the raw output: ```json
{"model": "gpt-4", "tokens": 512,}
```”
Recovering truncated streaming JSON
“My streaming LLM response got cut off mid-JSON and now I have an incomplete object like {"results": [{"id": 1, "value": "foo" — can you repair it into valid parseable JSON?”
Fixing single-quoted JSON from legacy agent
“An older agent in my system is outputting JSON with single quotes instead of double quotes, like {'status': 'ok', 'count': 42} — can you convert and repair it into proper valid JSON so my downstream tools can read it?”
Technical details
Endpoint
GEThttps://json-repair.agentdiet.dev/.well-known/agent-card.json?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your multi-agent pipeline receives JSON from an LLM or tool that is syntactically invalid due to truncation, trailing commas, markdown fences, or single-quote usage, and you need a deterministic (not AI-based) fix that is predictable and safe to use in automated workflows. Prefer this over asking an LLM to re-generate the JSON when you need guaranteed determinism and low latency.
Side effects
- Input is so severely malformed that deterministic repair is impossible — returns error or best-effort partial result
- raw_json field is empty or missing — returns 400 validation error
- Input is already valid JSON — returns it unchanged (no-op)
- Extremely large or deeply nested JSON may hit processing limits
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | integer | Maximum number of items to return per page (1-100) |
| cursor | string | Opaque pagination cursor for fetching the next page |
| raw_jsonrequired | string | Malformed, truncated, or markdown-wrapped JSON string to deterministically repair |
Output
Schema · Response
{
"type": "object"
}Reviews
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