# MON Token Purchase via mon.x420.dev

> MON Token Purchase via mon.x420.dev is a paid API for AI agents from mon.x420.dev, paid per call via x402, $1/call, status unknown (last checked 2026-09-14).

Executes a purchase of MON tokens worth 1 USDC on behalf of the caller, returning transaction details for the swap

## Facts

- Endpoint: GET https://mon.x420.dev/api/puff
- Price: $1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mon-x420-dev-c1684d4e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TSPx4n_UuRCEJCA8omhvK

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 mon-x420-dev-c1684d4e
```

Example prompt: Buy me 1 USDC worth of MON tokens right now — use the mon.x420.dev puff endpoint and tell me how many MON tokens I received and what the swap transaction hash was.

## When to prefer this

Use this endpoint when an agent needs to autonomously purchase MON tokens using exactly 1 USDC via a simple POST call with x402 micropayment protocol, without manually constructing a DEX swap transaction. Ideal for agentic workflows that want a one-click token acquisition abstraction.

## Known failure modes

- Insufficient USDC balance or payment failure — transaction not executed, no tokens received
- Smart contract or swap failure — sendTransactionHash present but swapTransactionHash null
- Network congestion or RPC error causing timeout
- Invalid or stale token contract address causing swap revert
- x402 payment protocol failure — HTTP 402 returned if payment not accepted

## How this service works

Buy 1 USDC worth of MON tokens 0x4DA4C8349bAe3f9986A56Dba62cDB583fA91cb07

## Output

Returns a message confirming the purchase, the amount of MON tokens received, the USDC amount paid, and optionally the send and swap transaction hashes on-chain.

## Example request

```json
{
 "amount": "1",
 "currency": "USDC"
}
```

## 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/mon-x420-dev-c1684d4e/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)