Create Message

Create a message using Anthropic-compatible API.

POST /v1/messages

cURL

curl https://gateway.bud.studio/v1/messages \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -H "anthropic-version: 2023-06-01" \
  -d '{
    "model": "claude-3-5-sonnet-20241022",
    "max_tokens": 1024,
    "messages": [
      {
        "role": "user",
        "content": "Hello, Claude!"
      }
    ]
  }'

200

{
  "id": "msg_abc123",
  "type": "message",
  "role": "assistant",
  "content": [
    {
      "type": "text",
      "text": "Hello! How can I help you today?"
    }
  ],
  "model": "claude-3-5-sonnet-20241022",
  "stop_reason": "end_turn",
  "stop_sequence": null,
  "usage": {
    "input_tokens": 10,
    "output_tokens": 12
  }
}

cURL

curl https://gateway.bud.studio/v1/messages \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -H "anthropic-version: 2023-06-01" \
  -d '{
    "model": "claude-3-5-sonnet-20241022",
    "max_tokens": 1024,
    "messages": [
      {
        "role": "user",
        "content": "Hello, Claude!"
      }
    ]
  }'

200

{
  "id": "msg_abc123",
  "type": "message",
  "role": "assistant",
  "content": [
    {
      "type": "text",
      "text": "Hello! How can I help you today?"
    }
  ],
  "model": "claude-3-5-sonnet-20241022",
  "stop_reason": "end_turn",
  "stop_sequence": null,
  "usage": {
    "input_tokens": 10,
    "output_tokens": 12
  }
}

Headers

Parameter	Type	Required	Description
Authorization	string	Yes	Bearer authentication header
anthropic-version	string	Yes	API version (e.g., 2023-06-01)

Body

Parameter	Type	Required	Description
model	string	Yes	Model identifier (e.g., claude-3-5-sonnet-20241022)
messages	array	Yes	Array of message objects with role and content
max_tokens	integer	Yes	Maximum tokens to generate
temperature	float	No	Sampling temperature (0.0 to 1.0). Default: 1.0
top_p	float	No	Nucleus sampling parameter. Default: 1.0
top_k	integer	No	Top-k sampling parameter
stop_sequences	array	No	Custom stop sequences
stream	boolean	No	Enable streaming response. Default: false
system	string	No	System prompt to guide the assistant
metadata	object	No	Metadata about the request

Supported Providers

Anthropic

Native Claude Messages API with full feature support

AWS Bedrock

Claude models on AWS infrastructure

Google Vertex AI

Claude models on Google Cloud