# Delx Commerce Token Echo API (v1)

> Delx Commerce Token Echo API (v1) 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).

Echoes back a submitted text string along with its character length, serving as a minimal pay-per-call test endpoint on the x402 payment protocol.

## Facts

- Endpoint: POST https://commerce.delx.ai/api/v1/x402/token-echo-1?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-token-echo-api-v1-6cb7fed5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0uFnOKU0Hw9PXn01_7-Jk

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-token-echo-api-v1-6cb7fed5 -d '<json body>'
```

Example prompt: Send the text 'ping-delx-1' to the Delx token echo endpoint and confirm it comes back with the correct length and schema label.

## When to prefer this

Use this endpoint when you need the simplest possible way to verify that your x402 micropayment pipeline is working end-to-end — it requires no signup, costs exactly $0.001 USDC per call, and confirms payment receipt, text handling, and verifiable delivery in a single round-trip. It is not meant for production data processing; choose it for integration testing and wallet/payment flow validation only.

## Known failure modes

- Payment not included or insufficient USDC — returns HTTP 402 requiring payment
- Invalid or missing 'text' field in request body — likely returns a 400 bad request
- Network or service unavailability — returns 5xx error
- Unsupported payment network — USDC must be on Base or Solana

## How this service works

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

## Output

A JSON object containing: the echo version number (echo: 1), the original text string submitted, the character length of that string, and a schema identifier string ('delx/util-token-echo-1/v1') confirming which endpoint schema was used.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "description": "Input field: text."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "echo": 1,
  "text": "ping-delx-1",
  "length": 11,
  "schema": "delx/util-token-echo-1/v1"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-commerce-token-echo-api-v1-6cb7fed5/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)