# TEST9999 Token Custom USDC Purchase

> TEST9999 Token Custom USDC Purchase 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 a custom USDC-specified amount of TEST9999 tokens (0x73e564323F7e05e7ca7781946A0707F4Cc296b07) on behalf of the caller, defaulting to 5 USDC if no amount is specified

## Facts

- Endpoint: POST https://test9999.x420.dev/api/puff-custom?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-custom-usdc-purchase-05167b44
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LW7Mz1Wx1jt7q_KOk9DLa

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-custom-usdc-purchase-05167b44 -d '<json body>'
```

Example prompt: Buy me $10.50 worth of TEST9999 tokens using USDC — I want to specify the exact custom amount rather than a fixed tier.

## When to prefer this

Use this endpoint when you need to purchase a specific, non-standard USDC amount of TEST9999 tokens (e.g. 0.5, 10, 10.5 USDC) rather than the fixed $1 or $5 USDC tiers offered by sibling endpoints. Ideal when the caller wants precise control over how much USDC to spend.

## Known failure modes

- Invalid or non-numeric USDC amount string — API may reject or default
- Insufficient USDC balance or allowance — transaction fails on-chain
- Slippage too high — swap may revert
- Contract address liquidity issues — swap transaction hash is null indicating failure
- Payment of $5 USDC call fee not provided — request blocked by x402 payment gate

## How this service works

Buy custom USDC amount worth of TEST9999 tokens 0x73e564323F7e05e7ca7781946A0707F4Cc296b07

## Output

Returns a message confirming the purchase, the number of TEST9999 tokens received, the USDC amount paid, a send transaction hash (or null), and a swap transaction hash (or null) for on-chain verification.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "amount": {
   "type": "string",
   "description": "Optional amount in USDC (e.g., '10', '10.5', '0.5'). Defaults to 5 if not provided."
  }
 }
}
```

## 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-custom-usdc-purchase-05167b44/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)