Querying blockchain data today requires knowing GraphQL, finding the right Subgraph out of 15,000+, writing queries, converting units, and stitching results together manually. The Graph MCP (Model Context Protocol) server is middleware that sits between an AI assistant such as @claudeai, @cursor_ai, or @Copilot and a data source. Instead of writing code, a developer talks to their AI or coding assistant. The MCP handles the "find the right Subgraph → write the query → fetch the data → format the result" layer invisibly. The Graph's indexed Subgraphs are the underlying data source. The MCP is a curated, opinionated interface on top of The Graph's network.