Messari — Leading Crypto Data Platform

Answer crypto questions using the Messari API: 34,000+ assets, 210+ exchanges, 14 data services covering market metrics, social sentiment, research, on-chain analytics, fundraising, governance, and more.

Base URL for all endpoints: https://api.messari.io

Step 1: Confirm Authentication

Follow this decision tree before every session. Do not skip to Step 2 until auth is confirmed.