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io.github.nexus-mcp-infra/onchain-activity-index

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

Source code Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http onchain-activity-index 'https://onchain-activity-index-325572559480.us-central1.run.app/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "onchain-activity-index": {
            "type": "http",
            "url": "https://onchain-activity-index-325572559480.us-central1.run.app/mcp"
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

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.

Frequently asked questions

What is io.github.nexus-mcp-infra/onchain-activity-index?

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

How do I install io.github.nexus-mcp-infra/onchain-activity-index?

It runs as a remote server. In Claude Code: claude mcp add --transport http onchain-activity-index 'https://onchain-activity-index-325572559480.us-central1.run.app/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does io.github.nexus-mcp-infra/onchain-activity-index need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is io.github.nexus-mcp-infra/onchain-activity-index open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains io.github.nexus-mcp-infra/onchain-activity-index?

It is published by nexus-mcp-infra. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.