Anthropic Messages
POST
https://api.cometapi.com/v1/messages
Maintainer:Not configured
Overview
Important Notes
This endpoint exclusively supports Claude models. For other models (GPT, Gemini, etc.), please use the Chat Completions endpoint.
When using
thinking parameter, the minimum budget is 1,024 tokens. Extended thinking tokens count towards your max_tokens limit.Reference Documentation
Request
Header Params
Body Params application/json
Responses
Request Request Example
Shell
JavaScript
Java
Swift
cURL
curl --location --request POST 'https://api.cometapi.com/v1/messages' \
--header 'Authorization: Bearer ' \
--header 'Content-Type: application/json' \
--data-raw '{
"max_tokens": 1024,
"system": "You are a helpful assistant.",
"messages": [
{
"content": "Hello, world",
"role": "user"
}
],
"model": "claude-sonnet-4-5-20250929"
}'Response Response Example
{
"id": "chatcmpl-a1568ee22c7a4f31848f3dc16c2f3",
"type": "message",
"role": "assistant",
"content": [
{
"type": "text",
"text": "Hello! It's nice to meet you. I'm Claude, an AI assistant. How can I help you today? Feel free to ask me anything you'd like - I'm happy to assist with a wide range of topics and tasks."
}
],
"model": "claude-3-5-sonnet-20240620",
"stop_reason": "end_turn",
"stop_sequence": null,
"usage": {
"input_tokens": 3,
"output_tokens": 52,
"cache_creation_input_tokens": 0,
"cache_read_input_tokens": 0
}
}Modified atĀ 2026-01-20 09:40:03