Claude · Schema

MessageParam

An input message in the conversation.

Artificial IntelligenceChatbotConversational AIGenerative AILarge Language ModelsMachine LearningNatural Language Processing

Properties

Name	Type	Description
role	string	The role of the message author.
content	object	The content of the message. Can be a string or array of content blocks.

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JSON Schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/MessageParam",
  "title": "MessageParam",
  "type": "object",
  "description": "An input message in the conversation.",
  "required": [
    "role",
    "content"
  ],
  "properties": {
    "role": {
      "type": "string",
      "description": "The role of the message author.",
      "enum": [
        "user",
        "assistant"
      ],
      "example": "user"
    },
    "content": {
      "description": "The content of the message. Can be a string or array of content blocks.",
      "oneOf": [
        {
          "type": "string"
        },
        {
          "type": "array",
          "items": {
            "$ref": "#/components/schemas/ContentBlockParam"
          }
        }
      ],
      "example": "example_value"
    }
  }
}