The Messages API accepts a top-level `system` parameter, not "system" as an input message role error whe using claude.

[emsi]

When using the CLaude model:

$ uvx --from dolphin-mcp dolphin-mcp-cli --config ./mcp_config.json --model claude-3-7-sonnet-latest "Hi"

the following error cures:

Anthropic error: Error code: 400 - {'type': 'error', 'error': {'type': 'invalid_request_error', 'message': 'messages: Unexpected role "system". The Messages API accepts a top-level system parameter, not "system" as an input message role.'}}

[ehartford]

Thanks! I will check it out

[emsi]

Thanks! I will check it out

If anything I would suggest to use litellm as interoperability library. It saves a lot of work at the minimal flexibility price.

[ehartford]

it's openai provider, set the host to litellm.