# USD1 Token Purchase - 5 USDC (x420.dev)

> USD1 Token Purchase - 5 USDC (x420.dev) is a paid API for AI agents from usd1.x420.dev, paid per call via x402, $5/call, status unknown (last checked 2026-10-16).

Purchases 5 USDC worth of USD1 stablecoin tokens from the x420.dev contract (0x618Fb9A538B0f7756648dC9A46f532050c86eb07) and returns transaction details

## Facts

- Endpoint: GET https://usd1.x420.dev/api/puff-5?utm_source=zero.xyz
- Price: $5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/usd1-token-purchase-5-usdc-x420-dev-48ccc357
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_a31i5aKmdqI8GUvYaiJdo

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 usd1-token-purchase-5-usdc-x420-dev-48ccc357
```

Example prompt: Buy me 5 USDC worth of USD1 tokens from the x420.dev contract — use the puff-5 endpoint and pay 5 USDC via x402.

## When to prefer this

Use this endpoint when you need to purchase exactly 5 USDC worth of USD1 tokens in a single call via x402 micropayment. Prefer this over the 1 USDC variant when you want a larger single purchase. Best for agents with x402-compatible wallets executing DeFi stablecoin swaps programmatically.

## Known failure modes

- Insufficient USDC balance — payment rejected by x402 facilitator
- Contract address unavailable or paused — swap fails
- Network congestion causes transaction timeout — swap hash may be null
- Invalid x402 payment header — 402 response returned
- Slippage too high during swap — tokens not received

## How this service works

Buy 5 USDC worth of USD1 tokens 0x618Fb9A538B0f7756648dC9A46f532050c86eb07

## Output

Returns a JSON object with a message confirming the purchase, the amount of USD1 tokens received (tokensReceived), the USDC amount paid (usdcAmountPaid), a send transaction hash (sendTransactionHash), and a swap transaction hash (swapTransactionHash).

## Response schema (JSON Schema)

```json
{
 "message": "string",
 "tokensReceived": "string",
 "usdcAmountPaid": "string",
 "sendTransactionHash": "string | null",
 "swapTransactionHash": "string | null"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/usd1-token-purchase-5-usdc-x420-dev-48ccc357/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from usd1.x420.dev](https://www.zero.xyz/host/usd1.x420.dev/llms.txt)