openapi: 3.2.0
info:
  title: LiteLLM Anthropic Passthrough API
  description: 'Proxy Server to call 100+ LLMs in the OpenAI format. **Customize Swagger Docs**


    👉 ```LiteLLM Admin Panel on /ui```. Create, Edit Keys with SSO. Having issues? Try ```Fallback Login```


    💸 ```LiteLLM Model Cost Map```.


    🔎 ```LiteLLM Model Hub```. See available models on the proxy. **Docs**'
  version: 1.102.1
tags:
- name: anthropic_passthrough
paths:
  /api/event_logging/batch:
    post:
      description: 'Stubbed endpoint for Anthropic event logging batch requests.


        This endpoint accepts event logging requests but does nothing with them.

        It exists to prevent 404 errors from Claude Code clients that send telemetry.'
      operationId: event_logging_batch_api_event_logging_batch_post
      responses:
        '200':
          content:
            application/json:
              schema: {}
          description: Successful Response
      summary: Event Logging Batch
      tags:
      - anthropic_passthrough
  /v1/messages:
    post:
      description: 'Use `{PROXY_BASE_URL}/anthropic/v1/messages` instead - Docs.


        This was a BETA endpoint that calls 100+ LLMs in the anthropic format.'
      operationId: anthropic_response_v1_messages_post
      responses:
        '200':
          content:
            application/json:
              schema: {}
          description: Successful Response
      security:
      - APIKeyHeader: []
      summary: Anthropic Response
      tags:
      - anthropic_passthrough
  /v1/messages/count_tokens:
    post:
      description: 'Count tokens for Anthropic Messages API format.


        This endpoint follows the Anthropic Messages API token counting specification.

        It accepts the same parameters as the /v1/messages endpoint but returns

        token counts instead of generating a response.


        Example usage:

        ```

        curl -X POST "http://localhost:4000/v1/messages/count_tokens?beta=true" -H "Content-Type: application/json" -H "Authorization: Bearer your-key" -d ''{

        "model": "claude-3-sonnet-20240229",

        "messages": [{"role": "user", "content": "Hello Claude!"}]

        }''

        ```


        Returns: {"input_tokens": }'
      operationId: count_tokens_v1_messages_count_tokens_post
      responses:
        '200':
          content:
            application/json:
              schema: {}
          description: Successful Response
      security:
      - APIKeyHeader: []
      summary: Count Tokens
      tags:
      - anthropic_passthrough
components:
  securitySchemes:
    APIKeyHeader:
      type: apiKey
      description: Bearer token
      in: header
      name: x-litellm-api-key