Documentation says --headers is an option, code says --header is the option.

[colin-stubbs]

Check Existing Issues

• I have searched the existing issues and discussions.
• I am using the latest version of mcpo.

mcpo Version

latest

Open WebUI Version (if applicable)

No response

Operating System

All

Browser (if applicable)

No response

Confirmation

• I have read and followed all instructions in README.md.
• I am using the latest version of both MCPO and Open WebUI.
• I have included the browser console logs.
• I have included the Docker container logs.
• I have listed steps to reproduce the bug in detail.

Expected Behavior

Documentation should accurately reflect code.

Actual Behavior

Tried to use --headers as described in the README, but I get this error.

user@box ~ % uvx mcpo --port 8000 --api-key "top-secret" --server-type "sse" --headers '{"X-API-Key": "asdf"}' -- http://127.0.0.1:8087/v1/mcp
Usage: mcpo [OPTIONS]
Try 'mcpo --help' for help.
╭─ Error ─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│ No such option: --headers Did you mean --header?                                                                                                            │
╰─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
user@box ~ % 

The actual code only supports --header, as in mcpo/src/mcpo/__init__.py,

    headers: Annotated[
        Optional[str], typer.Option("--header", "-H", help="Headers in JSON format")
    ] = None,

Steps to Reproduce

Use mcpo code, try to use --headers as described by README.md.

Logs & Screenshots

user@box ~ % uvx mcpo --port 8000 --api-key "top-secret" --server-type "sse" --headers '{"X-API-Key": "asdf"}' -- http://127.0.0.1:8087/v1/mcp
Usage: mcpo [OPTIONS]
Try 'mcpo --help' for help.
╭─ Error ─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│ No such option: --headers Did you mean --header?                                                                                                            │
╰─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
user@box ~ % 

Additional Information

No response