Liquid

A universal adapter that lets Claude talk to APIs, databases, and industrial systems through a single interface. It auto-discovers schemas from REST endpoints, GraphQL, gRPC, databases (Postgres, MongoDB, Redis, Neo4j), MQTT brokers, Modbus PLCs, OPC UA nodes, and even other MCP servers. You get four operations: fetch, query, write, and sense (for live streams). The interesting bits are server-side filtering to avoid fetching 10,000 records when you need 10, cross-source normalization so Stripe and PayPal amounts look the same, and structured error recovery that tells Claude exactly what tool to call when auth breaks. Reach for this when you're tired of writing per-service connectors or when you need Claude to work with industrial hardware, IoT pub/sub, or a database you don't want to expose raw SQL to.