The open-source reactive database for app developers
Connect Npx Y Convex@Latest MCP Start to Claude, Cursor or any other MCP client and it stops being a tab you switch to. The open-source reactive database for app developers. The npx y convex@latest mcp start mcp server is what makes that connection.
The toolset is worth reading before you wire it up, because it tells you what the integration is really for:
udf — runtime/ sets up the user-defined functions JS environment forsystem — udfs/ contains functions used by the Convex system e.g. the CLIBecause this one is hosted, setup is mostly authentication — you point your client at the endpoint and approve access. Nothing runs on your machine, so there is no runtime to keep patched.
Plenty of database access servers cover similar ground. The differences that matter in practice are scope of access and how much setup stands between you and a working tool call. Npx Y Convex@Latest MCP Start's toolset — udf, system — is a fair guide to whether it matches your workflow. It is maintained by get-convex; worth a glance at recent repository activity before you build anything load-bearing on it.
We check each listing at SyncDev against the project's documentation before it goes live — if something here drifts out of date, it is a bug worth reporting.
| Tool | What it does |
|---|---|
| udf | runtime/ sets up the user-defined functions JS environment for |
| system | udfs/ contains functions used by the Convex system e.g. the CLI |
Read-only SQL access to Postgres — let your assistant inspect schemas and answer questions from real data.
Manage your whole Supabase project in conversation — database, auth, storage, Edge Functions and branches.
Query, modify and analyse local SQLite databases in conversation — the fastest way to chat with a data file.
Metabase ships its own MCP endpoint — search your BI content, build and run queries, and save questions and dashboards without leaving the chat.
Official MongoDB server covering data, schemas and Atlas management — from find queries to spinning up clusters.
Serverless Postgres with database branching — point your assistant at Neon and let it work on disposable copies.