A Cloudflare Workers-based MCP server that enables querying the CIViC API by converting GraphQL responses into queryable SQLite tables using Cloudflare Durable Objects for efficient data staging and querying. The server implements MCP 2025-06-18 with structured tool output, protocol version headers, human-friendly tool titles, and extensive _meta metadata, along with robust error handling. It exposes a two-tool pipeline: civic_graphql_query to execute GraphQL queries and stage large datasets, and civic_query_sql to analyze staged data via SQL. Dataset management endpoints are provided at GET /datasets (list datasets) and DELETE /datasets/:id (remove a dataset). The system features automatic GraphQL-to-SQL conversion, smart response handling that bypasses staging for small responses, errors, and schema introspection queries, and a focus on fast, cache-friendly data processing. Tool annotations exist for client guidance (GraphQL and SQL tools), though full SDK integration is pending. Pending work includes a streamable HTTP transport (SSE currently used), OAuth 2.1 authorization, and removal of JSON-RPC batching (already implemented and then removed in the current spec).