# Monadx402 MON Token Purchase - $5 USDC (x420.dev)

> Monadx402 MON Token Purchase - $5 USDC (x420.dev) is a paid API for AI agents from mon.x420.dev, paid per call via x402, $5/call, status unknown (last checked 2026-09-13).

Executes a $5 USDC purchase of MON tokens on the Monad network, returning token amount received and transaction hashes

## Facts

- Endpoint: GET https://mon.x420.dev/api/puff-5
- Price: $5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/monadx402-mon-token-purchase-5-usdc-x420-dev-04ef832f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NvKeetgG-WBo3vu2G8q0U

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 monadx402-mon-token-purchase-5-usdc-x420-dev-04ef832f
```

Example prompt: Buy me $5 worth of MON tokens on Monad — use the x420.dev puff-5 endpoint and show me how many tokens I received and the swap transaction hash.

## When to prefer this

Use this endpoint when an agent needs to purchase exactly $5 USDC worth of MON tokens in a single automated call via the x402 payment protocol. Prefer over the $1 sibling endpoint when a larger single purchase is desired to reduce per-transaction overhead.

## Known failure modes

- Payment not received or insufficient USDC balance — swap not executed, null transaction hashes returned
- Network congestion on Monad causing swap transaction failure
- Liquidity unavailable for MON token swap at time of request
- Invalid or missing x402 payment header — request rejected
- Smart contract address unreachable or paused

## How this service works

Buy 5 USDC worth of MON tokens 0x4DA4C8349bAe3f9986A56Dba62cDB583fA91cb07

## Output

Returns a JSON object with a confirmation message, the amount of MON tokens received, the USDC amount paid, a send transaction hash (or null), and a swap transaction hash (or null) confirming the on-chain swap execution.

## 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/monadx402-mon-token-purchase-5-usdc-x420-dev-04ef832f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mon.x420.dev](https://www.zero.xyz/host/mon.x420.dev/llms.txt)