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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 whale-momentum.agentdiet.dev, paid per call via MPP, $0.002/call, status unknown (last checked 2026-10-21).
Repairs malformed, truncated, or badly-formatted LLM JSON outputs (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://whale-momentum.agentdiet.dev/v1/json-validator)
Output
Returns a JSON object containing the repaired, valid JSON string along with validation status, making the output safe to parse and pass downstream in agent pipelines.
Example use cases
Fix crashed multi-agent pipeline JSON
“Our agent pipeline just broke because the LLM returned JSON with trailing commas and single quotes instead of double quotes. Here's the bad output — can you repair it into valid JSON so we can keep processing: {"status": 'ok', "items": [1, 2, 3,]}”
Strip markdown fences from LLM response
“The model returned its answer wrapped in a ```json ... ``` markdown block and our parser is choking on it. Can you clean it up and give me the valid JSON inside: ```json {"result": "success", "count": 5} ```”
Recover truncated JSON from API timeout
“We hit a token limit mid-response and the JSON got cut off — it's missing closing brackets and braces. Can you deterministically repair this truncated JSON so it's complete and valid: {"user": {"id": 101, "name": "Bob", "roles": ["admin"”
Technical details
Endpoint
GEThttps://whale-momentum.agentdiet.dev/v1/json-validator?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your multi-agent pipeline receives LLM-generated JSON that fails to parse due to common formatting issues like trailing commas, markdown code fences, single quotes, or truncation. It is especially useful when deterministic repair (not AI re-generation) is needed to ensure consistency and avoid cascading failures in automated workflows.
Side effects
- Input JSON too severely malformed to deterministically repair — returns error indicating repair was not possible
- Empty or null raw_json parameter — returns validation error
- JSON structure is ambiguous after truncation — repair may make assumptions that differ from original intent
- Rate limiting or payment failure via x402 — returns 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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