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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 2026-10-23).
Repairs malformed, truncated, or improperly formatted JSON strings (trailing commas, markdown fences, single quotes) from LLM outputs 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
A repaired, valid JSON object that has been cleaned of common LLM formatting errors including trailing commas, markdown fences, single-quoted keys/values, and truncation issues — ready for downstream parsing without errors.
Example use cases
Fixing LLM output in agent pipeline
“My AI agent just returned this malformed JSON with single quotes and a trailing comma and now my downstream parser is crashing — can you repair it into valid JSON? Here's the raw string: {"user": 'Bob', "score": 98,}”
Stripping markdown fences before parsing
“The LLM wrapped its JSON response in markdown code fences and it's breaking my automation — can you strip the fences and fix any other formatting issues so I get clean, parseable JSON back? Raw output: ```json\n{"status": "ok",\n}\n```”
Recovering truncated JSON from partial LLM response
“The model got cut off mid-response and I have a truncated JSON object that won't parse — can you repair and close it out so it's valid JSON I can actually use? Here's what I got: {"items": [{"id": 1, "name": "widget"}”
Technical details
Endpoint
POSThttps://whale-momentum.agentdiet.dev/v1/json-validator?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you have LLM-generated or agent-produced JSON that fails standard parsing due to common formatting issues like trailing commas, markdown wrapping, single quotes, or truncation, and you need a deterministic (not AI-generated) repair rather than asking another LLM to fix it — especially valuable in multi-agent pipelines where JSON parsing failures would cascade.
Side effects
- Input is so severely malformed that deterministic repair cannot recover a valid structure, returning an error response
- JSON truncation is too deep or ambiguous to infer correct closing structure
- Non-JSON content passed (e.g. plain prose) that cannot be coerced into valid JSON
- Network timeout or service unavailability returning a 5xx error
- Payment failure via x402 returning a 402 response
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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