# TEST9999 Token Purchase - $1 USDC (x420.dev)

> TEST9999 Token Purchase - $1 USDC (x420.dev) is a paid API for AI agents from test9999.x420.dev, paid per call via x402, $1/call, status unknown (last checked 2026-10-13).

Buys $1 USDC worth of TEST9999 tokens (contract 0x73e564323F7e05e7ca7781946A0707F4Cc296b07) on behalf of the caller via a paid x402 API call

## Facts

- Endpoint: GET https://test9999.x420.dev/api/puff?utm_source=zero.xyz
- Price: $1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/test9999-token-purchase-1-usdc-x420-dev-fc1fef59
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Dy5NEGPFYtoOsfjFdUNmN

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 test9999-token-purchase-1-usdc-x420-dev-fc1fef59
```

Example prompt: Buy $1 worth of TEST9999 tokens for me using USDC — I want to see how many TEST9999 tokens I get and the transaction hash from the swap.

## When to prefer this

Use this endpoint when you want to purchase exactly $1 USDC worth of TEST9999 tokens in a single API call. Prefer the $5 sibling endpoint if you want a larger fixed purchase, or the custom amount endpoint for flexible sizing. This is the lowest-cost entry point for acquiring TEST9999 tokens programmatically via x402.

## Known failure modes

- Insufficient USDC balance — payment cannot be processed
- x402 payment protocol failure — authorization or payment header rejected
- On-chain swap failure — swap transaction reverts or times out
- Token contract unavailable — 0x73e564323F7e05e7ca7781946A0707F4Cc296b07 not responding
- Network congestion causing delayed or null transaction hashes

## How this service works

Buy 1 USDC worth of TEST9999 tokens 0x73e564323F7e05e7ca7781946A0707F4Cc296b07

## Output

Returns a message confirming the purchase, the number of TEST9999 tokens received, the USDC amount paid, and optionally the send transaction hash and swap transaction hash from the on-chain operations.

## 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/test9999-token-purchase-1-usdc-x420-dev-fc1fef59/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from test9999.x420.dev](https://www.zero.xyz/host/test9999.x420.dev/llms.txt)