# TEST TOKEN (TEST) - x420.dev — Buy 1 USDC

> TEST TOKEN (TEST) - x420.dev — Buy 1 USDC is a paid API for AI agents from test.x420.dev, paid per call via x402, $1/call, status unknown (last checked 2026-10-16).

Purchases 1 USDC worth of TEST ERC-20 tokens (0xb2410D63B28E842f94D6F29057ca66bCd7c96b07) and returns transaction details

## Facts

- Endpoint: GET https://test.x420.dev/api/puff?utm_source=zero.xyz
- Price: $1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/test-token-test-x420-dev-buy-1-usdc-f88aab86
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aFzgNdUVvBvkYwOhr0rPd

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 test-token-test-x420-dev-buy-1-usdc-f88aab86
```

Example prompt: Buy me 1 USDC worth of TEST tokens on x420.dev — the contract is 0xb2410D63B28E842f94D6F29057ca66bCd7c96b07 — and tell me how many tokens I received and the swap transaction hash.

## When to prefer this

Use this endpoint when you want to purchase a small (1 USDC) amount of TEST tokens on the x420.dev platform using the x402 micropayment protocol. Prefer this over the 5 USDC sibling endpoint when you only want a minimal purchase or are testing the integration. Best for agents that handle x402-compatible payments and need to acquire TEST tokens programmatically.

## Known failure modes

- Insufficient USDC balance — payment fails and no tokens are sent
- Smart contract error during swap — swap transaction hash may be null
- x402 payment not authorized — endpoint returns 402 before executing
- Network congestion causing transaction timeout
- Invalid wallet address or misconfigured payment header

## How this service works

Buy 1 USDC worth of TEST tokens 0xb2410D63B28E842f94D6F29057ca66bCd7c96b07

## Output

Returns a JSON object with a message string, the number of TEST tokens received, the USDC amount paid, the send transaction hash, and the swap transaction hash (both hashes may be null if not yet confirmed).

## 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/test-token-test-x420-dev-buy-1-usdc-f88aab86/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from test.x420.dev](https://www.zero.xyz/host/test.x420.dev/llms.txt)