# PromptVault — Checkout USDC Base

> PromptVault — Checkout USDC Base is a paid API for AI agents from promptvault-x402.onrender.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-17).

Purchase and download the PromptVault v1 system prompts and agent workflow ZIP pack by paying 0.1 USDC on Base via x402

## Facts

- Endpoint: GET https://promptvault-x402.onrender.com/tokensafe/full?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/promptvault-checkout-usdc-base-2bc3b043
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_myLYLMyA-bUSwsYgBkoa0

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 promptvault-checkout-usdc-base-2bc3b043
```

Example prompt: Buy me the PromptVault v1 prompt and agent workflow pack — pay the 0.1 USDC fee on Base and download the ZIP file for me.

## When to prefer this

Choose this endpoint when you need a curated, pre-packaged collection of system prompts and agent workflow templates delivered as a ZIP archive, and you are able to pay micro-fees in USDC on the Base network via the x402 protocol. Prefer this over manual prompt crafting when you want a ready-made library to bootstrap AI agent development quickly.

## Known failure modes

- Payment not included or invalid x402 header — returns 402 Payment Required
- Insufficient USDC balance on Base — payment fails before content is unlocked
- Network or provider downtime on Render — endpoint may return 502/503
- Malformed request properties — may return 400 Bad Request
- Re-calling without re-paying may not yield a fresh download (non-idempotent transaction)

## How this service works

Prompt + agent workflow pack sold via x402 (USDC on Base)

## Output

A JSON response containing the filename ('promptvault-v1.zip'), content type ('application/zip'), and a description confirming the ZIP archive of PromptVault v1 system prompts and agent workflows is available for download after successful payment.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "filename": "promptvault-v1.zip",
  "contentType": "application/zip",
  "description": "ZIP of PromptVault v1 system prompts and agent workflows after 3 USDC Base payment"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/promptvault-checkout-usdc-base-2bc3b043/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from promptvault-x402.onrender.com](https://www.zero.xyz/host/promptvault-x402.onrender.com/llms.txt)