Create Chat Completion With File | Captain API Documentation

OpenAI-compatible chat completions with file upload for large contexts.

This endpoint accepts multipart/form-data to handle contexts larger than 1 MB. The context file is automatically uploaded to S3 and processed.

Form fields:

file: The context file (text file)
messages: JSON string of chat messages
model: Model name (default: captain-voyager-latest)
stream: Enable streaming (default: true)
temperature: Sampling temperature (default: 0.7)

OpenAI-compatible chat completions with file upload for large contexts. This endpoint accepts multipart/form-data to handle contexts larger than 1 MB. The context file is automatically uploaded to S3 and processed. Form fields: - file: The context file (text file) - messages: JSON string of chat messages - model: Model name (default: captain-voyager-latest) - stream: Enable streaming (default: true) - temperature: Sampling temperature (default: 0.7)

Request

This endpoint expects a multipart form containing a file.

filefileRequired

Context file to upload

messagesstringRequired

JSON-encoded list of chat messages

modelstringOptionalDefaults to captain-voyager-latest

streambooleanOptionalDefaults to true

temperaturedouble or nullOptionalDefaults to 0.7

max_tokensinteger or nullOptional

toolsstring or nullOptional

JSON-encoded list of tool definitions

tool_choicestring or nullOptional

Tool choice strategy

Response

Successful Response

1	curl -X POST https://api.runcaptain.com/v1/chat/completions/upload \
2	-H "Content-Type: multipart/form-data" \
3	-F file=@string \
4	-F messages="string"

Request

Response

Errors