# PRB Token Custom Purchase (prb.x420.dev)

> PRB Token Custom Purchase (prb.x420.dev) is a paid API for AI agents from prb.x420.dev, paid per call via x402, $5/call, status unknown (last checked 2026-09-15).

Purchases a custom USDC amount of PRB tokens (0xb02ec227Ba060Ee60E205c8a626F2330DD4a5B07) on-chain and returns transaction details

## Facts

- Endpoint: POST https://prb.x420.dev/api/puff-custom
- Price: $5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/prb-x420-dev-cb0319f2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_msKPcy0H3FdtfVj3EaVfP

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 prb-x420-dev-cb0319f2 -d '<json body>'
```

Example prompt: Buy me 10 USDC worth of PRB tokens using the custom purchase endpoint.

## When to prefer this

Use this endpoint when you need to purchase more than 1 USDC worth of PRB tokens and want to specify an exact custom USDC amount. Use the sibling fixed endpoint for simple 1 USDC purchases.

## Known failure modes

- Insufficient USDC balance causes transaction failure
- Invalid amount format (non-numeric string) returns error
- Amount below minimum threshold rejected
- On-chain swap failure returns null transaction hashes
- Network congestion causes timeout or failed transaction

## How this service works

Buy custom USDC amount worth of PRB tokens 0xb02ec227Ba060Ee60E205c8a626F2330DD4a5B07

## Output

Returns a confirmation message, the number of PRB tokens received, the USDC amount paid, a send transaction hash, and a swap transaction hash for the on-chain operations.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/prb-x420-dev-cb0319f2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from prb.x420.dev](https://www.zero.xyz/host/prb.x420.dev/llms.txt)