24K Labs JSON Repair

x402

24K Labs JSON Repair is a paid API for AI agents from api.24klabs.ai, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-13).

Repairs malformed or truncated JSON (trailing commas, unquoted keys, cut-off LLM output) into valid, parseable JSON.

Price / call$0.008

Seller volume →—

Success—

StatusUnknown

How this service works

Fix malformed or truncated JSON (trailing commas, unquoted keys, cut-off LLM output) into valid, parseable JSON.

Output

A valid, parseable JSON string that has been repaired from the malformed input, with syntax errors such as trailing commas, unquoted keys, and truncated structures corrected.

Example use cases

Fix truncated LLM JSON output

“The language model cut off mid-response and the JSON is incomplete — can you repair it so I can parse it? Here's the broken output: {"name": "report", "items": [{"id": 1, "val”

Clean up scraped JSON with syntax errors

“I scraped some data and the JSON has trailing commas and some unquoted keys — it's failing to parse. Can you fix it into valid JSON? Here it is: {name: "ProductA", tags: ["sale", "new",]}”

Recover malformed config file JSON

“My config file JSON is malformed — it has a trailing comma after the last property and won't load. Please repair it: {"host": "localhost", "port": 5432, "debug": true,}”

Technical details

Endpoint

POSThttps://api.24klabs.ai/api/json-repair

When to prefer

Choose this endpoint when you have JSON that is almost valid but contains common syntax issues like trailing commas, unquoted keys, or LLM-generated truncation, and you need a fast, cheap ($0.008/call) automated fix without writing custom parser logic. Prefer it over manual string manipulation or regex patching when the JSON structure is complex or the errors are varied.

Side effects

Input is too severely malformed or ambiguous to repair deterministically
Input is not JSON-like at all (e.g. plain text or XML) — may return an error or unexpected output
Truncation is too deep to infer the intended structure
API returns 4xx for missing or malformed request body
Network timeout or service unavailability (5xx)

Input

Schema · Request body

Field	Type	Description
json	string

Output

Schema · Response

{
  "type": "json",
  "example": {
    "repaired": {
      "name": "Bob"
    }
  }
}

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Example use cases

Fix truncated LLM JSON output

“The language model cut off mid-response and the JSON is incomplete — can you repair it so I can parse it? Here's the broken output: {"name": "report", "items": [{"id": 1, "val”

Clean up scraped JSON with syntax errors

“I scraped some data and the JSON has trailing commas and some unquoted keys — it's failing to parse. Can you fix it into valid JSON? Here it is: {name: "ProductA", tags: ["sale", "new",]}”

Recover malformed config file JSON

“My config file JSON is malformed — it has a trailing comma after the last property and won't load. Please repair it: {"host": "localhost", "port": 5432, "debug": true,}”

Technical details

Endpoint

POSThttps://api.24klabs.ai/api/json-repair

When to prefer

Side effects

Input is too severely malformed or ambiguous to repair deterministically
Input is not JSON-like at all (e.g. plain text or XML) — may return an error or unexpected output
Truncation is too deep to infer the intended structure
API returns 4xx for missing or malformed request body
Network timeout or service unavailability (5xx)

Input

Schema · Request body

Field	Type	Description
json	string

Output

Schema · Response

{
  "type": "json",
  "example": {
    "repaired": {
      "name": "Bob"
    }
  }
}