Files
genai-toolbox/docs/en/resources/sources/postgres.md
isaurabhuttam 0d7d8ab516 feat (tools/postgres-list-available-extensions, tools/postgres-list-installed-extensions): add tool types postgres-list-available-extensions and postgres-list-installed-extensions (#1401)
## Description

This PR adds two read-only, PostgreSQL tool kinds to MCPToolbox that
standardize discovery of extensions:

- `postgres-list-installed-extensions` – lists extensions installed in
the current database with: `name`, `version`, `schema`, `owner`
`description`.

- `postgres-list-available-extensions` – lists extensions available to
install on the cluster with: `name`, `default_version`, `description`.

Both are safe by default, and return well-typed JSON suitable for UIs,
agents, and automation.

**Test Output**
- `list_installed_extensions`

<img width="1414" height="781" alt="image"
src="https://github.com/user-attachments/assets/aab102a7-90ab-4516-9bc2-bcbfdab02bb1"
/>

- `list_available_extensions`

<img width="1421" height="774" alt="image"
src="https://github.com/user-attachments/assets/a4f80f22-bb2e-4350-acb2-12eb020d88cb"
/>



---
> Should include a concise description of the changes (bug or feature),
it's
> impact, along with a summary of the solution

## PR Checklist

---
> Thank you for opening a Pull Request! Before submitting your PR, there
are a
> few things you can do to make sure it goes smoothly:

- [x] Make sure you reviewed

[CONTRIBUTING.md](https://github.com/googleapis/genai-toolbox/blob/main/CONTRIBUTING.md)
- [x] Make sure to open an issue as a

[bug/issue](https://github.com/googleapis/genai-toolbox/issues/new/choose)
before writing your code! That way we can discuss the change, evaluate
  designs, and agree on the general idea
- [x] Ensure the tests and linter pass
- [x] Code coverage does not decrease (if any source code was changed)
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🛠️ Fixes #<issue_number_goes_here>
2025-09-17 02:24:18 +00:00

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3.1 KiB
Markdown

---
title: "PostgreSQL"
type: docs
weight: 1
description: >
PostgreSQL is a powerful, open source object-relational database.
---
## About
[PostgreSQL][pg-docs] is a powerful, open source object-relational database
system with over 35 years of active development that has earned it a strong
reputation for reliability, feature robustness, and performance.
[pg-docs]: https://www.postgresql.org/
## Available Tools
- [`postgres-sql`](../tools/postgres/postgres-sql.md)
Execute SQL queries as prepared statements in PostgreSQL.
- [`postgres-execute-sql`](../tools/postgres/postgres-execute-sql.md)
Run parameterized SQL statements in PostgreSQL.
- [`postgres-list-tables`](../tools/postgres/postgres-list-tables.md)
List tables in a PostgreSQL database.
- [`postgres-list-active-queries`](../tools/postgres/postgres-list-active-queries.md)
List active queries in a PostgreSQL database.
- [`postgres-list-available-extensions`](../tools/postgres/postgres-list-available-extensions.md)
List available extensions for installation in a PostgreSQL database.
- [`postgres-list-installed-extensions`](../tools/postgres/postgres-list-installed-extensions.md)
List installed extensions in a PostgreSQL database.
### Pre-built Configurations
- [PostgreSQL using MCP](https://googleapis.github.io/genai-toolbox/how-to/connect-ide/postgres_mcp/)
Connect your IDE to PostgreSQL using Toolbox.
## Requirements
### Database User
This source only uses standard authentication. You will need to [create a
PostgreSQL user][pg-users] to login to the database with.
[pg-users]: https://www.postgresql.org/docs/current/sql-createuser.html
## Example
```yaml
sources:
my-pg-source:
kind: postgres
host: 127.0.0.1
port: 5432
database: my_db
user: ${USER_NAME}
password: ${PASSWORD}
```
{{< notice tip >}}
Use environment variable replacement with the format ${ENV_NAME}
instead of hardcoding your secrets into the configuration file.
{{< /notice >}}
## Reference
| **field** | **type** | **required** | **description** |
|-------------|:------------------:|:------------:|------------------------------------------------------------------------|
| kind | string | true | Must be "postgres". |
| host | string | true | IP address to connect to (e.g. "127.0.0.1") |
| port | string | true | Port to connect to (e.g. "5432") |
| database | string | true | Name of the Postgres database to connect to (e.g. "my_db"). |
| user | string | true | Name of the Postgres user to connect as (e.g. "my-pg-user"). |
| password | string | true | Password of the Postgres user (e.g. "my-password"). |
| queryParams | map[string]string | false | Raw query to be added to the db connection string. |