mcp-postgresql
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| PGSSL | No | Enable SSL/TLS. Alternative: POSTGRES_SSL. | false |
| PGHOST | No | PostgreSQL host. Alternative: POSTGRES_HOST. | localhost |
| PGPORT | No | PostgreSQL port. Alternative: POSTGRES_PORT. | 5432 |
| PGUSER | No | Database user. Alternative: POSTGRES_USER. | |
| PGDATABASE | No | Default database. Alternative: POSTGRES_DB. | postgres |
| PGPASSWORD | No | Database password. Alternative: POSTGRES_PASSWORD. | |
| PGPOOL_MAX | No | Max pool connections. | 10 |
| POSTGRES_DB | No | Alternative for PGDATABASE. | |
| POSTGRES_SSL | No | Alternative for PGSSL. | |
| POSTGRES_HOST | No | Alternative for PGHOST. | |
| POSTGRES_PORT | No | Alternative for PGPORT. | |
| POSTGRES_USER | No | Alternative for PGUSER. | |
| POSTGRES_PASSWORD | No | Alternative for PGPASSWORD. | |
| PGPOOL_IDLE_TIMEOUT_MS | No | Pool idle timeout in milliseconds. | 30000 |
Instructions
Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.
This server publishes no instructions, or was last inspected before Glama recorded them.
Capabilities
Features and capabilities supported by this server
Protocol revision2025-11-25
| Capability | Details |
|---|---|
| tools | {} |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| execute_queryA | Executes a SQL query in PostgreSQL and returns rows or affected row count. |
| list_tablesB | Lists tables in the current database, optionally filtered by schema. |
| describe_tableA | Returns table structure: columns, types, nullability, defaults, and PK markers. |
| list_databasesA | Lists all PostgreSQL databases in the server. |
| get_table_indexesB | Lists indexes for a table with index definition and PK/uniqueness flags. |
| get_foreign_keysB | Lists foreign keys of a table and their referenced targets. |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
TDQS
Scored across 6 tools
Each tool targets a distinct database operation: describe structure, run queries, list foreign keys, list indexes, list databases, and list tables. No overlap in functionality.
All tool names follow a consistent verb_noun pattern with underscores (e.g., describe_table, execute_query). No mixing of conventions.
With 6 tools, the set is well-scoped for a PostgreSQL server, covering essential schema exploration and query execution without being bloated.
Covers core introspection and querying, but lacks tools for DDL operations (create/alter/drop) or listing users/roles. Minor gap for power users.