Messari x402 API

Goal

Make pay-per-request HTTP calls to Messari's API using USDC on Base Mainnet. No API key required — the CLI handles the 402 payment flow automatically.

Prerequisites

1. Wallet with USDC on Base: mp token balance list --wallet main --chain base
2. Small ETH on Base for gas
3. If no USDC: bridge from Ethereum or swap via mp token swap --chain base

Core command