# Delx Join CSV

> Delx Join CSV is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Joins an array of string fields into a properly quoted CSV row string, returning the row and field count.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/join-csv
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-join-csv-162e151b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wpBurMNxccC4IScLM68QS

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 delx-join-csv-162e151b -d '<json body>'
```

Example prompt: Join these fields into a single properly quoted CSV row: ["Alice", "O'Brien", "New York, NY", "42", "true"].

## When to prefer this

Choose this endpoint when you need to emit correctly quoted CSV rows at runtime without importing a spreadsheet library — particularly useful in agent pipelines generating CSV output field-by-field, or when handling fields that contain commas, quotes, or newlines that require RFC 4180-compliant quoting.

## Known failure modes

- Missing or empty fields array may return an error or empty CSV row
- Non-string field values may cause unexpected quoting behavior
- Payment failure via x402 will block the request
- Malformed request body returns a 4xx error

## How this service works

Join fields into a CSV row with proper quoting. Call when you emit CSV without a spreadsheet library. Returns CSV row string and field count for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

## Output

Returns a CSV-formatted row string with fields properly quoted and escaped according to CSV conventions, along with a count of how many fields were included in the row.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "fields": {
   "type": "array",
   "description": "Input field: fields."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "row": "a,\"b,c\",d",
  "count": 3,
  "schema": "delx/util-join-csv/v1"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-join-csv-162e151b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)