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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 workflows.agentdiet.dev, paid per call via MPP, $0.002/call, status unknown (last checked 2026-10-21).
Repairs truncated or malformed LLM-generated JSON (trailing commas, markdown fences, single quotes) so multi-agent pipelines can continue without crashing.
Price / call$0.002
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://workflows.agentdiet.dev/v1/json-fix)
Output
A JSON object containing the repaired, syntactically valid version of the input JSON. The output resolves issues like trailing commas, markdown code fences, single-quoted keys or values, and truncation, returning a well-formed JSON structure that downstream systems can safely parse.
Example use cases
LLM output sanitization in agent pipeline
“My agent just got this response from GPT and it has trailing commas and single quotes that are crashing the next step — fix it into valid JSON: {'user': 'bob', 'score': 42,}”
Stripping markdown fences from structured output
“The model wrapped its JSON answer in triple backticks and now my parser is failing. Can you clean this up and return just the valid JSON object: ```json
{"items": [1, 2, 3]}
```”
Repairing truncated JSON from a token-limited response
“I hit the token limit mid-response and got a cut-off JSON string — can you repair and complete it as best as possible so I can extract the data: {"order_id": "ORD-999", "customer": {"name": "Jane"”
Technical details
Endpoint
GEThttps://workflows.agentdiet.dev/v1/json-fix?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your multi-agent pipeline receives JSON from an LLM that is syntactically invalid due to common LLM artifacts like trailing commas, markdown fences, single quotes, or truncation, and you need a deterministic, rule-based repair rather than asking the LLM to regenerate. Prefer this over retrying the LLM when latency or cost matters, or when you need a reliable fix pass before downstream schema validation.
Side effects
- Input is so severely malformed it cannot be deterministically repaired — returns an error or best-effort partial result
- Input string is empty or below minimum length (minLength: 1) — returns validation error
- JSON is structurally ambiguous and repair introduces unintended data changes
- Network timeout or service unavailability returns a non-200 HTTP response
- x402 payment not fulfilled — returns HTTP 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| raw_jsonrequired | string | Malformed, truncated, or markdown-wrapped JSON string to deterministically repair |
Output
Schema · Response
{
"type": "object"
}Reviews
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