Claude Native API

Claude Native API supports text generation, multi-turn conversations, image understanding, and multimodal capabilities. Supports both streaming and non-streaming output modes.

Create Message

Create conversation messages with text, images, and multimodal inputs. Control streaming output via the stream parameter.

Note: Requests must include the anthropic-version: 2023-06-01 header.

Create Message

post

Create conversation messages with text, images, and multimodal inputs. Control streaming output via the stream parameter.

Authorizations

BearerAuth

AuthorizationstringRequired

Authenticate using Bearer Token. Get API Key at https://viralapi.ai/api-key

Header parameters

anthropic-versionstring · enumRequired

API version number, must be set to 2023-06-01

Example: 2023-06-01Possible values:

Body

application/json

modelstring · enumRequired

Model name

Example: claude-3-5-sonnet-20241022Possible values:

max_tokensinteger · min: 1 · max: 8192Required

Maximum output tokens (required)

Example: 4096

systemstringOptional

System prompt

Example: You are a professional translation assistant.

temperaturenumber · max: 1Optional

Temperature value (0-1). Higher values produce more random output

Default: 1Example: 0.7

top_pnumber · max: 1Optional

Nucleus sampling parameter

top_kinteger · min: 1Optional

Top-k sampling parameter

streambooleanOptional

Enable streaming output

Default: falseExample: false

stop_sequencesstring[]Optional

Stop sequences

Responses

200

Generation successful

application/json

400

Invalid request parameters

application/json

401

Authentication failed

application/json

403

Insufficient permissions

application/json

500

Internal server error

application/json

post

/v1/messages

HTTPcURLJavaScriptPython

POST /v1/messages HTTP/1.1
Host: viralapi.ai
Authorization: Bearer YOUR_SECRET_TOKEN
anthropic-version: 2023-06-01
Content-Type: application/json
Accept: */*
Content-Length: 228

{
  "model": "claude-3-5-sonnet-20241022",
  "max_tokens": 4096,
  "messages": [
    {
      "role": "user",
      "content": [
        {
          "type": "image",
          "source": {
            "type": "url",
            "url": "https://example.com/image.jpg"
          }
        },
        {
          "type": "text",
          "text": "Please describe this image"
        }
      ]
    }
  ]
}

{
  "id": "msg_01XFDUDYJgAACzvnptvVoYEL",
  "type": "message",
  "role": "assistant",
  "content": [
    {
      "type": "text",
      "text": "Hello! I'm Claude, an AI assistant developed by Anthropic. I can help you with various tasks, including answering questions, analyzing content, writing code, and more. How can I assist you today?"
    }
  ],
  "model": "claude-3-5-sonnet-20241022",
  "stop_reason": "end_turn",
  "usage": {
    "input_tokens": 12,
    "output_tokens": 85
  }
}