Add streamable HTTP transport support

[jssmith]

Summary

• Add support for the streamable-http transport option alongside the existing stdio and sse transports
• This addresses the deprecation of SSE transport in favor of streamable HTTP

Changes

• Add streamable-http as a transport choice
• Add --streamable-http-host and --streamable-http-port arguments
• Call mcp.run_streamable_http_async() for streamable-http transport
• Add comprehensive tests for all transport options

Usage

uv run postgres-mcp --transport streamable-http --streamable-http-port 8000

Attribution

Based on work by @ahmedmustahid in #78. This PR extracts just the streamable HTTP functionality with tests, without the signal handling and formatting changes.

Related

• Closes Support for StreamableHttp in the Postgres MCP server #102
• Supersedes Add Streamable HTTP Support and Graceful Shutdown for Postgres MCP Server #78 (streamable HTTP portion only - signal handling will be a separate PR)

Test plan

• All existing tests pass (191 passed)
• New transport tests verify correct method dispatch for stdio/sse/streamable-http
• Host/port argument tests verify settings are applied correctly

🤖 Generated with Claude Code

[EMoeini]

Hello @jssmith ,

Do you have a rough estimate when a new release will be published with the new changes? It'd be great to have a new docker image released with the new changes

[bmomjian]

I believe README.md needs to be updated for this patch. It currently says:

Postgres MCP Pro supports both the Standard Input/Output (stdio) and Server-Sent Events (SSE) transports, for flexibility in different environments.

In my reading of this, "streamable http" is not supported, but it is based on this commit.

[MPeli]

Hi @jssmith,

I was wondering whether you could make a new release.

Thank you.

[HeGuanyuan]

Hi @jssmith,

Following up on this merged PR from January 22, 2026. Do you have an estimate for when the next release will go out with the streamable-http transport support?

This feature is already merged, and it would be very helpful to have it available in a published release / Docker image.

Thanks.