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JSON Schema Repair Guard
x402
JSON Schema Repair Guard is a paid API for AI agents from robotshop.up.railway.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).
Strips markdown code fences, fixes trailing commas, repairs unquoted JSON keys, and validates repaired JSON against a strict schema for AI pipelines.
Price / call$0.01
Success—
StatusUnknown
How this service works
Fast AST microservice that strips markdown code fences, fixes trailing commas, repairs unquoted JSON keys, and enforces strict schema validation for AI pipelines.
Output
Returns a schema-validated, syntax-corrected JSON object with markdown code fences removed, trailing commas eliminated, and unquoted keys quoted. May include a validation status or error details if the repaired JSON still fails schema constraints.
Example use cases
Clean LLM output before database write
“The AI just gave me back some JSON with backtick code fences and a trailing comma — can you strip the fences, fix the commas, and validate it so I can safely write it to the database?”
Fix unquoted keys in agent pipeline
“My agent pipeline keeps crashing because the model outputs JSON with unquoted keys. Can you repair those keys and enforce schema validation before the next step runs?”
Sanitize structured data from AI response
“I've got an AI response that's supposed to be structured JSON but it's got markdown formatting and syntax errors — can you clean it up and confirm it passes schema validation?”
Technical details
Endpoint
GEThttps://robotshop.up.railway.app/api/v1/products/prod-json-schema-repair-guard/buy?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI pipeline receives LLM-generated JSON that may contain markdown formatting artifacts (code fences), trailing commas, or unquoted keys, and you need both syntax repair and strict schema validation in a single fast call. Ideal for agentic workflows where raw model output must be sanitized before downstream processing.
Side effects
- JSON too malformed to repair — returns error with details on unparseable content
- Schema validation failure after repair — returns repaired JSON alongside schema violation details
- Empty or null input — returns validation error
- Malformed input that is not JSON at all — returns parse error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| client_id | string | Optional calling agent or client ID |
Tags
x402
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