# 24K Labs Data Format Validator & Linter

> 24K Labs Data Format Validator & Linter is a paid API for AI agents from api.24klabs.ai, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).

Validates and lints JSON, YAML, CSV, or XML input, returning a validity flag, error location (line/column), and a normalized re-serialized copy when valid.

## Facts

- Endpoint: POST https://api.24klabs.ai/api/v1/data-format-validate
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/24k-labs-data-format-validator-linter-2ccc6fb1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JuEkiTginslJP2M89WaXx

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability 24k-labs-data-format-validator-linter-2ccc6fb1 -d '<json body>'
```

Example prompt: Can you validate this JSON for me and tell me exactly where the error is if it's broken? Here it is: {"name": "Alice", "age": 30, "roles": ["admin", "user"}

## When to prefer this

Choose this endpoint when you need a single, format-agnostic validation and normalization service for structured data files (JSON, YAML, CSV, XML) — especially when you also need the exact error location (line/column) rather than just a pass/fail result. Prefer it over custom parsers when you want a normalized copy returned alongside validation status.

## Known failure modes

- Unsupported format type returns a 400 error
- Extremely large documents may time out
- Ambiguous format not specified by caller leads to misidentification
- Binary or non-text content causes parse failure
- Network or service unavailability returns a 5xx error

## How this service works

Validate and lint JSON, YAML, CSV, or XML. Returns a valid flag, the line/column of the first error when invalid, and a normalized (re-serialized) copy when valid.

## Output

Returns a JSON object containing: a boolean 'valid' flag; if invalid, the line and column of the first error plus an error message; if valid, a normalized (re-serialized) copy of the input document in its original format.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "string"
  },
  "format": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "valid": true,
  "format": "json",
  "normalized": "{\n  \"a\": 1\n}"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/24k-labs-data-format-validator-linter-2ccc6fb1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.24klabs.ai](https://www.zero.xyz/host/api.24klabs.ai/llms.txt)