Create Claude Message

POST

/v1/messages

Anthropic Claude Messages API format. Use this endpoint to call Claude models
with the native Anthropic request/response format.

Authentication: Use x-api-key header with your CCAPI token (not Authorization).

If anthropic-version header is not provided, it defaults to 2023-06-01.

When stream: true, the response is text/event-stream.

Supports:

Multi-turn conversations

Tool use / function calling

Extended thinking / reasoning (thinking parameter)

Vision (image inputs in content blocks)

Streaming SSE

Request

Authorization

API Key

Add parameter in header

x-api-key

Example:

x-api-key: ********************

Header Params

Body Params application/jsonRequired

Example

{
    "model": "claude-sonnet-4-6",
    "max_tokens": 1024,
    "system": "string",
    "messages": [
        {
            "role": "user",
            "content": null
        }
    ],
    "stream": false,
    "temperature": 0,
    "stop_sequences": [
        "string"
    ],
    "tools": [
        {
            "name": "string",
            "description": "string",
            "input_schema": {}
        }
    ],
    "tool_choice": {
        "type": "auto",
        "name": "string"
    },
    "thinking": {
        "type": "enabled",
        "budget_tokens": 0
    }
}

Request Code Samples

Shell

JavaScript

Java

Swift

PHP

Python

HTTP

Objective-C

Ruby

OCaml

Dart

curl --location --request POST 'https://api.ccapi.ai//v1/messages' \
--header 'anthropic-version;' \
--header 'anthropic-beta;' \
--header 'x-api-key: <api-key>' \
--header 'Content-Type: application/json' \
--data-raw '{
    "model": "claude-sonnet-4-6",
    "max_tokens": 1024,
    "system": "string",
    "messages": [
        {
            "role": "user",
            "content": null
        }
    ],
    "stream": false,
    "temperature": 0,
    "stop_sequences": [
        "string"
    ],
    "tools": [
        {
            "name": "string",
            "description": "string",
            "input_schema": {}
        }
    ],
    "tool_choice": {
        "type": "auto",
        "name": "string"
    },
    "thinking": {
        "type": "enabled",
        "budget_tokens": 0
    }
}'

Responses

🟢200success

application/json

Claude message response

Body

Example

{
    "id": "msg_01ABC",
    "type": "message",
    "role": "assistant",
    "model": "claude-opus-4-6",
    "content": [
        {
            "type": "text",
            "text": "Idempotency prevents duplicate charges, shipments, or accounting entries when payment platform notifications are retried."
        }
    ],
    "stop_reason": "end_turn",
    "usage": {
        "input_tokens": 58,
        "output_tokens": 36
    }
}

🟠400未认证

🟠401

🟠402

🟠429

🔴500

Modified at 2026-03-15 06:56:57

Gemini Stream Generate Content

Create Chat Completion