Let coding agents query any SQL database safely. Read-only by default and scoped by your policies.
Valv is an MCP integration. Let coding agents query any SQL database safely. Read-only by default and scoped by your policies.
The published npm package is @valv/mcp, version 0.6.2. Its declared MCP transport is stdio.
The package declares DATABASE_URL (required): Database connection string. PostgreSQL, MySQL, SQLite, CockroachDB, or a ClickHouse HTTP URL.; VALV_PROVIDER: Datasource provider: postgresql, mysql, sqlite, or clickhouse. Inferred from DATABASE_URL when omitted.; VALV_DATABASE: Database name. Required for ClickHouse, whose URL does not carry one.; VALV_TABLES: Comma-separated allow-list of tables. When set, only these are exposed to the agent.; VALV_EXCLUDE: Comma-separated deny-list of tables, applied after the allow-list.; VALV_POLICY_FILE: Path to a policy module that takes full control of access. Without it, the server is read-only across all tables.; VALV_CONTEXT: JSON context object the policy reads, e.g. {"tenant":{"id":"acme"}}.; VALV_HTTP_PORT: Serve over Streamable HTTP on this port instead of stdio..
Check the maintainer’s instructions for account access, authentication and the supported client configuration. Once connected, inspect the tools your client receives and try a small task that matches the server’s stated purpose. The registry description does not include a verified, complete tool list.
View the publisher’s registry entry · Project repository · Project website. This profile uses version 0.6.2 from the registry. Registration identifies the publisher namespace; it does not establish that this is a first-party integration for every service it connects.
Browse related databases MCP servers for tools that cover the same kind of work.
| Variable | Description | Required |
|---|---|---|
| DATABASE_URL | Database connection string. PostgreSQL, MySQL, SQLite, CockroachDB, or a ClickHouse HTTP URL. | Yes |
| VALV_PROVIDER | Datasource provider: postgresql, mysql, sqlite, or clickhouse. Inferred from DATABASE_URL when omitted. | Optional |
| VALV_DATABASE | Database name. Required for ClickHouse, whose URL does not carry one. | Optional |
| VALV_TABLES | Comma-separated allow-list of tables. When set, only these are exposed to the agent. | Optional |
| VALV_EXCLUDE | Comma-separated deny-list of tables, applied after the allow-list. | Optional |
| VALV_POLICY_FILE | Path to a policy module that takes full control of access. Without it, the server is read-only across all tables. | Optional |
| VALV_CONTEXT | JSON context object the policy reads, e.g. {"tenant":{"id":"acme"}}. | Optional |
| VALV_HTTP_PORT | Serve over Streamable HTTP on this port instead of stdio. | Optional |
Inspect PostgreSQL schemas and run read-only queries with the archived MCP reference server. Review its maintenance status before choosing it.
Connect the Notion MCP server to search workspace content and work with pages and databases through Notion’s hosted OAuth service.
Use the Supabase MCP server to inspect database schemas, query project data and retrieve docs through a project-scoped connection.
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.