Get Response

Get a response by ID.

Supports both:

• Polling IDs (litellm_poll_*): Returns cumulative cached content from background responses
• Provider response IDs: Passes through to provider API

Follows the OpenAI Responses API spec: https://platform.openai.com/docs/api-reference/responses/get

# Get polling response
curl -X GET http://localhost:4000/v1/responses/litellm_poll_abc123     -H "Authorization: Bearer sk-1234"

# Get provider response
curl -X GET http://localhost:4000/v1/responses/resp_abc123     -H "Authorization: Bearer sk-1234"