# TEST9999 Token Purchase - $5 USDC (x420.dev)

> TEST9999 Token Purchase - $5 USDC (x420.dev) is a paid API for AI agents from test9999.x420.dev, paid per call via x402, $5/call, status unknown (last checked 2026-10-13).

Purchases $5 USDC worth of TEST9999 tokens (0x73e564323F7e05e7ca7781946A0707F4Cc296b07) via an x402 payment-gated API call

## Facts

- Endpoint: GET https://test9999.x420.dev/api/puff-5?utm_source=zero.xyz
- Price: $5/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-5-usdc-x420-dev-6cedfe6b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0ODDFJvMzaLT9zY3_p2xl

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-5-usdc-x420-dev-6cedfe6b
```

Example prompt: Buy me $5 worth of TEST9999 tokens using USDC on x420.dev — use the 5 USDC fixed tier and confirm how many tokens I received along with the transaction hashes.

## When to prefer this

Use this endpoint when you want to purchase exactly $5 USDC worth of TEST9999 tokens in a single fixed-amount call. Prefer this over the $1 tier when buying a larger fixed amount, or over the custom-amount endpoint when you specifically want a standard $5 purchase with no additional input needed.

## Known failure modes

- Insufficient USDC balance to cover the $5 payment — payment rejected by x402 facilitator
- Token contract unavailable or liquidity insufficient — swap fails with null swapTransactionHash
- Network congestion causing transaction delay or failure
- x402 payment header missing or malformed — 402 Payment Required response
- Token contract address mismatch or contract not found on chain

## How this service works

Buy 5 USDC worth of TEST9999 tokens 0x73e564323F7e05e7ca7781946A0707F4Cc296b07

## Output

Returns a message confirming the purchase, the number of TEST9999 tokens received, the USDC amount paid, the send transaction hash, and the swap transaction hash (both may be null if not yet processed).

## 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-5-usdc-x420-dev-6cedfe6b/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)