# Toolbelt402 Download Endpoint

> Toolbelt402 Download Endpoint is a paid API for AI agents from toolbelt402.catalystdesk.workers.dev, paid per call via x402, $9/call, status unknown (last checked 2026-10-11).

Downloads a ZIP file binary via a pay-per-call GET request using x402 USDC micropayments on Base, no API key required.

## Facts

- Endpoint: GET https://toolbelt402.catalystdesk.workers.dev/v1/kit/download?utm_source=zero.xyz
- Price: $9/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/toolbelt402-download-endpoint-e24b86f5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OKF5m4ffdZ7xdK30YtofA

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 toolbelt402-download-endpoint-e24b86f5
```

Example prompt: Download the ZIP bundle from Toolbelt402 using a one-time USDC micropayment on Base — no API key needed, just pay and fetch the file.

## When to prefer this

Choose this endpoint when you need to download a ZIP binary resource via a trustless, pay-per-call mechanism using USDC on Base without requiring an API key or subscription. Ideal for AI agents operating in autonomous payment contexts using the x402 protocol where frictionless micropayments replace traditional auth.

## Known failure modes

- Payment insufficient or failed — x402 payment not accepted, returns 402 Payment Required
- Invalid or malformed request — wrong method or type field returns 400 Bad Request
- Service unavailable — Cloudflare Worker down or cold start timeout
- Incorrect Content-Type handling — client must handle binary/octet-stream or application/zip response
- Network timeout on large ZIP file download

## How this service works

Pay-per-call utility API for AI agents — x402, USDC on Base, no API key.

## Output

Returns a raw binary ZIP file (application/zip) as the response body. The agent receives a downloadable archive that can be extracted for its contents — likely utility scripts, tools, or resources for AI agents.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    }
   }
  },
  "output": {
   "type": "object"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "binary",
 "example": {
  "note": "application/zip binary"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/toolbelt402-download-endpoint-e24b86f5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from toolbelt402.catalystdesk.workers.dev](https://www.zero.xyz/host/toolbelt402.catalystdesk.workers.dev/llms.txt)