Messari action provider

[Bijan-Massoumi]

Description

This PR adds a new Messari action provider that enables AI agents to query the Messari AI toolkit for crypto market research data. The provider allows agents to ask research questions about market data, statistics, rankings, historical trends, and information about specific protocols, tokens, or platforms.

The implementation follows the AgentKit action provider pattern and includes comprehensive tests.

Tests

Chatbot: typescript/examples/langchain-cdp-chatbot/chatbot.ts
Network: Sepolia
Setup: Added the Messari action provider + add MESSARI_API_KEY to .env

Prompt: what is the current TVL of Aave on Base

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Messari Research Results:

The current Total Value Locked (TVL) of Aave on the Base network is approximately $2,684,741,069.77.
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The current Total Value Locked (TVL) of Aave on the Base network is approximately **$2,684,741,069.77**.
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Checklist

A couple of things to include in your PR for completeness:

• Added documentation to all relevant README.md files
• Added a changelog entry

[cb-heimdall]

🟡 Heimdall Review Status

Requirement	Status	More Info
Reviews	🟡 0/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 1 Sum 2

[Bijan-Massoumi]

@cb-heimdall This is ready for review :)