# agent402.tools JSON/JSONL Converter

> agent402.tools JSON/JSONL Converter is a paid API for AI agents from agent402.tools, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Converts between a JSON array and JSONL/NDJSON format (one JSON object per line) in either direction.

## Facts

- Endpoint: POST https://agent402.tools/api/jsonl
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent402-tools-json-jsonl-converter-c67d1480
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CfvL-C08qP0-c4qLtzu4_

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 agent402-tools-json-jsonl-converter-c67d1480 -d '<json body>'
```

Example prompt: Convert this JSON array to JSONL format (one object per line): [{"id":1,"name":"Alice"},{"id":2,"name":"Bob"}] — use to-jsonl mode.

## When to prefer this

Use this endpoint when you need a simple, cheap ($0.001 USDC) stateless conversion between JSON array and JSONL/NDJSON formats, especially in agent pipelines that stream records or ingest datasets line-by-line. Prefer it over writing custom serialization code when working in an x402 payment-enabled agentic environment.

## Known failure modes

- Invalid JSON array provided in to-jsonl mode — malformed JSON returns an error
- Non-JSONL string provided in from-jsonl mode — lines that aren't valid JSON objects cause parse failures
- Missing or invalid mode value — unknown mode strings may return an error
- Empty input data — may return empty output or an error depending on implementation

## How this service works

Convert between a JSON array and JSONL/NDJSON (one JSON object per line). mode: to-jsonl (array → lines) or from-jsonl (lines → array). For streaming records to and from agents and datasets.

## Output

Returns the converted data: either a JSONL string with one JSON object per line (to-jsonl mode) or a parsed JSON array (from-jsonl mode).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "description": "array (to-jsonl) or JSONL string (from-jsonl)"
  },
  "mode": {
   "type": "string",
   "description": "to-jsonl | from-jsonl"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "mode": "to-jsonl",
  "count": 2,
  "result": "{\"a\":1}\n{\"a\":2}"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent402-tools-json-jsonl-converter-c67d1480/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent402.tools](https://www.zero.xyz/host/agent402.tools/llms.txt)