Messages

POST

/v1/messages

Send a structured list of input messages with text and/or image content, and the model will generate the next message in the conversation.
The Messages API can be used for either single queries or stateless multi-turn conversations.

Request

Header Params

Body Params application/json

Examples

Responses

🟢200Success

application/json

Body

🟠400Bad Request

Request Example

Shell

JavaScript

Java

Swift

curl --location --request POST '/v1/messages' \
--header 'anthropic-beta;' \
--header 'anthropic-version: 2023-06-01' \
--header 'x-api-key: $ANTHROPIC_API_KEY' \
--header 'Content-Type: application/json' \
--data-raw '{
    "model": "claude-3-7-sonnet-20250219",
    "max_tokens": 1024,
    "messages": [
        {
            "role": "user",
            "content": "Hello, world"
        }
    ]
}'

Response Example

200 - Example 1

{
    "content": [
        {
            "text": "Hi! My name is Claude.",
            "type": "text"
        }
    ],
    "id": "msg_013Zva2CMHLNnXjNJJKqJ2EF",
    "model": "claude-3-7-sonnet-20250219",
    "role": "assistant",
    "stop_reason": "end_turn",
    "stop_sequence": null,
    "type": "message",
    "usage": {
        "input_tokens": 2095,
        "output_tokens": 503
    }
}

Modified at 2025-03-25 05:47:01

Streaming Messages

How to Use Apidog for gRPC API Documentation and Testing