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Netzhandwerker JSON Repair
x402
Netzhandwerker JSON Repair is a paid API for AI agents from tools.netzhandwerker.de, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Automatically repairs malformed JSON text by fixing common syntax errors and returns both the cleaned JSON string and a parsed object with a detailed repair log.
Price / call$0.001
Success—
StatusUnknown
How this service works
x402-Werkzeuge für autonome Agenten.
Output
Returns an object containing the repaired JSON as a string, the fully parsed JSON object, a list of repairs applied (each with a fix type and detail), boolean flags for validity before and after repair, and the total repair count.
Example use cases
Fix LLM-generated JSON output
“The AI returned JSON wrapped in a markdown code block with trailing commas and single quotes — can you repair it so I can actually parse it? Here's the bad text: ```json {'name':'Acme Corp','year':2024,'active':true,}```”
Repair API response with comments
“I'm getting JSON back from a legacy API that includes JavaScript-style comments and unquoted keys and it's breaking my parser — can you clean it up? The text is: {name: 'Widget', // product name price: 9.99}”
Validate JSON before database insert
“Before I save this JSON to the database, can you check if it's valid and fix any issues like extra commas or code fences? Here's the text: {"id": 42, "tags": ["x", "y",], "active": true,}”
Technical details
Endpoint
POSThttps://tools.netzhandwerker.de/v1/json/repairWhen to prefer
Choose this endpoint when you have a JSON string that fails to parse due to common syntax issues like trailing commas, single quotes, unquoted keys, markdown code fences, or inline comments — especially useful for cleaning up LLM-generated JSON or outputs from non-strict JSON serializers. Prefer this over manual string manipulation when you need a detailed repair log explaining what was changed.
Side effects
- Input text is so malformed it cannot be repaired into valid JSON — endpoint may return an error or indicate valid_after remains false
- Empty or null text input may result in a validation error
- Extremely large JSON strings may time out
- Input that is not JSON-like at all (plain prose) may fail to produce a meaningful result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Der fehlerhafte JSON-Text |
Output
Schema · Response
{
"type": "json",
"example": {
"json": "{\"name\":\"Bau GmbH\",\"jahr\":2026,\"tags\":[\"a\",\"b\"],\"aktiv\":true}",
"parsed": {
"jahr": 2026,
"name": "Bau GmbH",
"tags": [
"a",
"b"
],
"aktiv": true
},
"repairs": [
{
"fix": "code_fence_removed",
"detail": "Markdown-Zaun um das JSON entfernt"
},
{
"fix": "comments_removed",
"count": 1
},
{
"fix": "trailing_comma_removed",
"count": 2
},
{
"fix": "single_quotes_converted",
"count": 3
},
{
"fix": "unquoted_key_or_value_quoted",
"count": 4
}
],
"valid_after": true,
"repair_count": 5,
"valid_before": false
}
}Tags
x402
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