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Generating an API Key

Messari API Key Generation Interface

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Access the API Dashboard

Navigate to the API Access page in your Messari account. Your API Key will be visible at the top of the page.

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Using the API Key

The API key must be included in the request headers using the x-messari-api-key header field: 
{
  "headers": {
    "x-messari-api-key": "YOUR_API_KEY_HERE"
  }
}

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Permissions

API access is tiered based on your subscription level. By default, all users have access to the Assets & Market Data and Exchanges API endpoints. For access to additional endpoints and services such as Fundraising, Intel, News & Topics, and more, please contact sales@messari.io.

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Example Request (cURL)

The following example demonstrates how to send a request to the Messari API using cURL with the x-messari-api-key header: 
curl --location 'https://api.messari.io/ai/v1/chat/completions' \
--header 'x-messari-api-key: YOUR_API_KEY_HERE' \
--header 'Content-Type: application/json' \
--data '{
    "messages": [
        {
            "role": "user",
            "content": "Briefly explain what the Hyperliquid HyperEVM is"
        }
    ],
    "verbosity": "succinct",
    "response_format": "markdown"
}'

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Security Best Practices

Secure Storage

Never share your API key publicly or commit it to version control

Environment Variables

Store API keys in environment variables rather than hardcoding them

Regular Rotation

Periodically update your API key for security purposes