{"name":"On-Chain Activity Index","description":"Computes a 0-100 quantitative DeFi Protocol Activity Index from real DefiLlama data (TVL trend, fee/volume activity trend, diversification, scale). Pure descriptive metric, not a trading signal or financial advice.","url":"https://onchain-activity-index-325572559480.us-central1.run.app","version":"1.0.0","documentationUrl":"https://onchain-activity-index-325572559480.us-central1.run.app/docs","provider":{"organization":"nexus-mcp-infra","url":"https://github.com/nexus-mcp-infra"},"capabilities":{"streaming":false,"pushNotifications":false,"stateTransitionHistory":false},"defaultInputModes":["application/json"],"defaultOutputModes":["application/json"],"additionalInterfaces":[{"url":"https://onchain-activity-index-325572559480.us-central1.run.app/mcp","transport":"MCP"}],"skills":[{"id":"nexus_onchain_activity_index_get_onchain_activity_index","name":"Get On-Chain Activity Index","description":"Compute a 0-100 quantitative DeFi protocol activity index from real TVL/fee/volume/diversification data. Not financial advice.","tags":["defi","on-chain","analytics","activity-index"]}],"metadata":{"protocol_note":"This service implements the Model Context Protocol (MCP) at /mcp, not A2A's own task methods. POST /activity-index is charged $0.30 via x402 (Base Sepolia TESTNET, not real funds). Payment settles BEFORE computation runs, at the ASGI middleware layer ahead of request validation: a call is charged even if it returns a 404 (unknown protocol_slug) or 422 (no usable data). The MCP tool is currently free -- see README. IMPORTANT: the activity_index returned is a pure descriptive metric of on-chain activity level, NOT a trading signal, price prediction, or recommendation to buy/sell/hold any asset -- it must not be represented as investment advice downstream."}}