Is Onchain Activity Index free?

Yes, Onchain Activity Index is free to use.

How do I install Onchain Activity Index?

Onchain Activity Index is a remote plugin. You do not need to install anything locally. Add the server URL to your AI app's MCP configuration and you are ready to go.

Is Onchain Activity Index safe to use?

Yes. Onchain Activity Index passed MCP Marketplace's automated security scan with a score of 10/10 (low risk). Every server on MCP Marketplace is security-scanned before it's listed; see the full security report on this page for the findings and permissions.

What AI apps work with Onchain Activity Index?

Onchain Activity Index uses the Model Context Protocol (MCP) and works with any MCP-compatible AI app, including Claude, ChatGPT / Codex, Gemini, Copilot, Cursor, and more.

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Onchain Activity Index MCP Server

by Nexus Mcp Infra

Developer ToolsLow Risk10.0MCP RegistryRemote

Free

Server data from the Official MCP Registry

DeFi Protocol Activity Index -- quantitative on-chain activity metric from DefiLlama data

About

DeFi Protocol Activity Index -- quantitative on-chain activity metric from DefiLlama data

Remote endpoints: streamable-http: https://onchain-activity-index-325572559480.us-central1.run.app/mcp

Security Report

10.0

Low Risk10.0Low Risk

Valid MCP server (1 strong, 0 medium validity signals). No known CVEs in dependencies. Imported from the Official MCP Registry.

1 tool verified · Open access · No issues found

Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.

Permissions Found in Source Code

Found by scanning the linked source code. This listing connects to a hosted endpoint, so none of this runs on your machine: it describes what the server software does where it is hosted.

HTTP Network Access

Connects to external APIs or services over the internet.

How to Connect

Remote Plugin

No local installation needed. Your AI client connects to the remote endpoint directly.

Add this to your MCP configuration to connect:

{
  "mcpServers": {
    "io-github-nexus-mcp-infra-onchain-activity-index": {
      "url": "https://onchain-activity-index-325572559480.us-central1.run.app/mcp"
    }
  }
}

Documentation

View on GitHub

From the project's GitHub README.

On-Chain Activity Index

Computes a 0-100 quantitative DeFi Protocol Activity Index from real, public DefiLlama data (TVL trend, fee/volume activity trend, chain diversification, scale). NEXUS candidate #9 -- manual build, not FORGE-generated.

This is a pure descriptive metric -- not a trading signal, price prediction, or financial recommendation of any kind.

POST /activity-index {"protocol_slug": "uniswap"} -- charged $0.30 via x402 (Base mainnet, real USDC).
MCP tool get_onchain_activity_index at /mcp -- currently free.
GET /health, GET /.well-known/agent-card.json, GET /openapi.json (has x-payment-info).

Live: https://onchain-activity-index-325572559480.us-central1.run.app

Mainnet cutover (2026-09-03)

Originally built and measured on Base Sepolia testnet. Cut over to Base mainnet: x402 settlement moved to the CDP facilitator (create_facilitator_config(), same swap already applied to ws/live-entity-verification/erc8004-agent-liveness), and the payto wallet moved to NEXUS_X402_PAYTO_ADDRESS (fail-fast env var, no placeholder default, renamed from X402_WALLET_ADDRESS). CDP_API_KEY_ID/CDP_API_KEY_SECRET and NEXUS_X402_PAYTO_ADDRESS must be set in Cloud Run before this deploys.

Full source, methodology, and quality-gate history: see the private NEXUS monorepo (manual_assets/onchain-activity-index/). This repo exists to satisfy MCP Registry namespace ownership verification (io.github.nexus-mcp-infra/onchain-activity-index) and as the public landing page for the deployed service.

A free, MIT-licensed companion skill (client usage guide, no payment required to read/use) lives at nexus-mcp-infra/onchain-activity-skill.

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