# Delx Commerce — Join CSV Fields

> Delx Commerce — Join CSV Fields is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).

Joins an array of field values into a properly RFC 4180-compliant CSV row string, escaping fields with commas or quotes as needed

## Facts

- Endpoint: POST https://commerce.delx.ai/api/v1/x402/join-csv?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-commerce-join-csv-fields-d8a29f1b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9jIRLDm7SJP0XufQzDuxW

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-commerce-join-csv-fields-d8a29f1b -d '<json body>'
```

Example prompt: Join these fields into a properly escaped CSV row: ["Alice", "Boston, MA", "Sales", "100,000"]

## When to prefer this

Choose this endpoint when you need a reliable, RFC-compliant CSV row serializer that correctly handles edge cases like embedded commas, quotes, and special characters in field values — particularly in agent pipelines that build CSV files incrementally or validate CSV output. At $0.001 USDC per call with no signup, it is ideal for lightweight utility use in automated workflows where correctness matters more than writing a custom escaper.

## Known failure modes

- Missing or empty `fields` array returns an error or empty row
- Non-array input for `fields` may cause a 400 validation error
- Payment failure via x402 protocol results in a 402 Payment Required response before processing
- Fields containing null or non-string values may cause serialization errors

## How this service works

Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.

## Output

Returns a JSON object containing: `row` (the fully RFC 4180-compliant CSV row string with proper quoting and escaping), `count` (the number of fields serialized), and `schema` (a schema identifier string 'delx/util-join-csv/v1' for verification purposes)

## 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-commerce-join-csv-fields-d8a29f1b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from commerce.delx.ai](https://www.zero.xyz/host/commerce.delx.ai/llms.txt)