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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 mcp-security.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) deterministically so multi-agent pipelines never crash on bad JSON.
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://mcp-security.agentdiet.dev/v1/structured-output)
Output
A repaired, valid JSON object derived from the malformed input. The endpoint returns a structured JSON response with the corrected content, having resolved issues like trailing commas, markdown code fences, single-quoted keys/values, and truncated structures.
Example use cases
Fix LLM pipeline JSON crash
“My agent just got this response from GPT and it's crashing my pipeline because the JSON has a trailing comma and single quotes instead of double quotes — can you clean it up and give me valid JSON back? Here's the raw output: {'name': 'Bob', 'score': 42,}”
Strip markdown fences from structured output
“The model returned its answer wrapped in triple backticks with a json tag, and my downstream parser can't handle it. Can you strip the markdown fences and return just the clean JSON object?”
Repair truncated JSON from streaming response
“I was streaming a response from the LLM and it got cut off mid-object — the JSON is incomplete and missing its closing braces. Can you deterministically repair it so I can extract the fields I need?”
Technical details
Endpoint
GEThttps://mcp-security.agentdiet.dev/v1/structured-output?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need deterministic, rule-based JSON repair rather than probabilistic LLM-based fixing. Ideal for multi-agent pipelines where LLM outputs frequently contain markdown fences, trailing commas, or single quotes that break downstream parsers. Prefer this over ad-hoc string manipulation when reliability and consistency are critical, especially in production agent workflows.
Side effects
- Input JSON is so severely malformed that deterministic repair is impossible — returns error
- Input string is empty or whitespace — fails minLength validation
- JSON structure is ambiguous and cannot be deterministically resolved — may return best-effort or error
- Network timeout or service unavailability — HTTP 5xx response
- Payment not provided — HTTP 402 response requiring x402 USDC payment
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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