# x402 Seller Kit: Cloudflare Worker Template for Selling Files with USDC

> x402 Seller Kit: Cloudflare Worker Template for Selling Files with USDC is a paid API for AI agents from x402-seller-kit.soloearn.workers.dev, paid per call via x402, $29/call, status unknown (last checked 2026-10-29).

Downloads a Cloudflare Worker template (ZIP) for selling digital files for USDC on Base using the x402 payment protocol, including D1 order tracking, one-time claim logic, and a threat model — costs $29 USDC per download.

## Facts

- Endpoint: GET https://x402-seller-kit.soloearn.workers.dev/download?utm_source=zero.xyz
- Price: $29/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-seller-kit-cloudflare-worker-template-for-selling-files-with-usdc-fa4ce773
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5xByKmIpvdxUqCCuhieve

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 x402-seller-kit-cloudflare-worker-template-for-selling-files-with-usdc-fa4ce773
```

Example prompt: I want to sell a digital file for USDC on Cloudflare Workers — get me the x402 Seller Kit template that includes the order engine, D1 schema, threat model, and smoke test for $29 USDC.

## When to prefer this

Choose this endpoint when you need a production-ready, pre-built Cloudflare Worker template for selling digital files with USDC on Base via the x402 protocol, and want one-time-claim enforcement, D1 order tracking, and a threat model included out of the box — rather than building these components from scratch.

## Known failure modes

- Payment not provided or invalid x402 payment proof — 402 Payment Required response
- Duplicate order code reuse attempt — one-time claim already consumed, access denied
- Network or Worker availability issue — 5xx error from Cloudflare
- Malformed request headers — 400 Bad Request

## How this service works

Worker template to sell a digital file for USDC on Base: x402 402 challenge, order-code checkout, one-time claims in D1, threat model. $29 USDC.

## Output

A binary ZIP file (x402-seller-kit-v1.zip) containing a complete Cloudflare Worker template for selling digital files via the x402 payment protocol, including: orders.js engine, D1 database schema, threat model documentation, directory playbook, and a smoke test suite.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "binary",
 "example": {
  "filename": "x402-seller-kit-v1.zip",
  "contentType": "application/zip",
  "description": "Worker template, orders.js engine, D1 schema, threat model, directory playbook, smoke test"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-seller-kit-cloudflare-worker-template-for-selling-files-with-usdc-fa4ce773/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-seller-kit.soloearn.workers.dev](https://www.zero.xyz/host/x402-seller-kit.soloearn.workers.dev/llms.txt)