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Atinamos JSON Validate / Repair
x402
Atinamos JSON Validate / Repair is a paid API for AI agents from agent.atinamos.co.uk, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Deterministically validates and conservatively repairs malformed JSON strings, reporting every transformation applied without inventing or hallucinating data.
Price / call$0.005
Success—
StatusUnknown
How this service works
Deterministic JSON validation and conservative repair for AI-agent payloads. Repairs unquoted object keys, single-quoted strings, trailing commas, Markdown code fences, UTF-8 BOMs and JSON-compatible Python literals, including nested or repeated defects. No LLM or invented data; every applied transformation is reported.
Output
Returns the validated or repaired JSON string along with a structured list of every transformation that was applied (e.g. 'removed trailing comma at line 4', 'converted single-quoted strings to double-quoted'). In validate mode, returns a pass/fail result with any detected defects. No data is invented or hallucinated; only reversible, conservative fixes are applied.
Example use cases
Fixing LLM-generated JSON payloads
“The JSON our AI model returned has unquoted keys and trailing commas and keeps breaking our parser — can you repair it and tell me what was changed so I can log the issues?”
Pre-parse validation without modification
“Before I try to parse this JSON string, can you just validate it and tell me whether it's clean, without making any changes to it? I want to know if it's strictly valid.”
Stripping Markdown fences from agent output
“Our agent keeps wrapping its JSON responses in triple-backtick Markdown code fences — can you strip those out and return clean, parseable JSON, listing what you removed?”
Technical details
Endpoint
POSThttps://agent.atinamos.co.uk/agent/json-repairWhen to prefer
Prefer this endpoint when you need deterministic, auditable JSON repair with a full transformation log and zero risk of hallucinated or invented data. It is ideal for AI agent pipelines where LLM outputs are often nearly-valid JSON with common defects like trailing commas, single quotes, or Markdown wrappers. Choose this over an LLM-based repair approach when you need reproducibility, auditability, and guaranteed no data invention. Best for payloads up to 256KB.
Side effects
- Input exceeds 262144 character limit — request rejected
- JSON is so malformed it cannot be conservatively repaired without inventing data — returns error rather than guessing
- Invalid mode value (not 'validate' or 'repair') — validation error
- Non-JSON-like content (e.g. binary data, HTML) that cannot be interpreted as JSON — returns failure with reason
- Network timeout or service unavailability — HTTP 5xx error
- Payment not received or insufficient — HTTP 402 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| json | string | JSON or JSON-like text to validate or conservatively repair. Supported repairs include unquoted object keys, single-quoted strings, trailing commas, Markdown fences, UTF-8 BOMs and JSON-compatible Python literals. |
| mode | string |
Tags
x402
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