sqlens-mcp
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| DEVDB_URL | No | Database URL for the default connection. Supports postgres://, mysql://, sqlite:// or .db/.sqlite path. Example: postgres://localhost/myapp |
Capabilities
Features and capabilities supported by this server
| Capability | Details |
|---|---|
| tools | {
"listChanged": true
} |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| list_connectionsA | List all configured database connections and their dialects. Call this first to see what databases are available. |
| list_tablesA | List all tables and views in a database with row counts and sizes. |
| describe_tableA | Show columns (types, nullability, defaults, primary keys), indexes, and foreign keys for a table or view. |
| run_queryA | Execute a read-only SELECT query and return results as a formatted table. Only SELECT and WITH statements are permitted. |
| explain_queryA | Run EXPLAIN ANALYZE (Postgres) or EXPLAIN (MySQL/SQLite) on a SELECT query to show the execution plan. Useful for diagnosing slow queries. |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
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