Claude Chat/Cowork Desktop App LiteLLM Integration

[JumpyWizard404]

Hi everyone i recently started testing the LiteLLM integration with Anthropics Claude Desktop App for chat and cowork i went trough this document https://docs.litellm.ai/docs/tutorials/claude_desktop_cowork enabled third party inference in developer mode set up the key it restarted and logged me out of the Team Subscription account im using to test this and then came back with this error that i added in a sceenshot. From what i gathered that means that the LiteLLM proxy authenticated me fine but that Anthropic is the one that bounced my authentication due to no usable credentials. My question is does this mean that i need the api authentication with the pay as you go token usage for enterprise or do i just have a misconfiguration somewhere, my LiteLLM config is below:

model_list:

• model_name: claude-opus-4-8
  litellm_params:
  model: anthropic/claude-opus-4-8
• model_name: claude-sonnet-4-6
  litellm_params:
  model: anthropic/claude-sonnet-4-6
• model_name: claude-haiku-4-5
  litellm_params:
  model: anthropic/claude-haiku-4-5-20251001

general_settings:
forward_llm_provider_auth_headers: true
forward_client_headers_to_llm_api: true # Required: forwards OAuth token to Anthropic
master_key: "sk-1111111111111111111111111111111111111111111111"
database_url: "postgresql://user:password@localhost:5432/litellm"

litellm_settings:
master_key: "sk-1111111111111111111111111111111111111111111111"

Any assistance on the topic would be greatly appreciated.

[B-Reiter]

Same version of LiteLLM, same issue with Anthropic Claude.

Is this expected to work?

• Claude Desktop App on Windows
• Claude Team Subscription
• Passthrough authentication through LiteLLM towards Anthropic

The idea is to be able to use the cost-efficient Team Subscription instead of Claude Platform API.

Thank you

[omni-front]

Your issue sounds like it might be related to authentication and token management with Anthropic's system. It's important to ensure that your token is correctly configured and that Anthropic allows usage under your current subscription. The document you mentioned might have more details on setting up the API. Also, make sure your forward_client_headers_to_llm_api is correctly configured to pass necessary OAuth tokens. For further troubleshooting, check the litellm/proxy/proxy_server.py file to verify how authentication headers are managed and passed. If the issue persists, consider reviewing any related issues in the project's GitHub issues section for similar problems.

[JumpyWizard404]

So to provide some more information the forward_client_headers_to_llm_api is already set to true and i am testing with a Team Based account rather than an enterprise one, so fixed team license, no pay as you go token usage. Not sure if that makes a difference

[omni-front]

Check if the Team Based account has specific limitations on API usage or token management compared to the enterprise one. It's worth reviewing Anthropic's documentation for any differences in API configurations or permissions between account types.