# title: Messages url: https://platform.claude.com/docs/en/api/compliance/apps/chats/messages

# Messages

# Get chat messages

GET /v1/compliance/apps/chats/{claude_chat_id}/messages

Retrieves message history and file metadata for a specific chat.

# Path parameters

claude_chat_id: string

The chat ID (tagged ID, e.g., claude_chat_abc123)

# Query parameters

after_id: optional string

Pagination cursor for retrieving the next page of results. To paginate, pass the last_id value from the most recent response. Clients should treat this value as an opaque string and not attempt to parse or interpret its contents, as the format may change without notice.
before_id: optional string

Pagination cursor for retrieving the previous page of results. To paginate, pass the first_id value from the most recent response. Clients should treat this value as an opaque string and not attempt to parse or interpret its contents, as the format may change without notice.
created_at: optional object
- gt: optional string
  
  Filter messages created after this time (RFC 3339 format)
  
  format: date-time
- gte: optional string
  
  Filter messages created at or after this time (RFC 3339 format)
  
  format: date-time
- lt: optional string
  
  Filter messages created before this time (RFC 3339 format)
  
  format: date-time
- lte: optional string
  
  Filter messages created at or before this time (RFC 3339 format)
  
  format: date-time
limit: optional number

Maximum results (max: 1000). When omitted, the full result set is returned in one response.

maximum: 1000, minimum: 1
order: optional "asc" or "desc"

Sort direction for messages within the response. asc (the default) returns oldest-first; desc returns newest-first.

default: asc
- "asc"
- "desc"
tool_result_max_chars: optional number

Maximum characters returned per tool-result text item. Items longer than this are shortened and the block's truncated field is set. Pass -1 to disable the limit.

default: 10000, minimum: -1
tool_use_input_max_chars: optional number

Maximum characters of JSON-encoded tool input returned per tool_use block. Inputs longer than this are shortened and the block's truncated field is set. Pass -1 to disable the limit.

default: 10000, minimum: -1
updated_at: optional object
- gt: optional string
  
  Filter messages updated after this time (RFC 3339 format)
  
  format: date-time
- gte: optional string
  
  Filter messages updated at or after this time (RFC 3339 format)
  
  format: date-time
- lt: optional string
  
  Filter messages updated before this time (RFC 3339 format)
  
  format: date-time
- lte: optional string
  
  Filter messages updated at or before this time (RFC 3339 format)
  
  format: date-time

# Headers

"x-api-key": optional string

# Returns

id: string

Chat ID
chat_messages: array of object

Array of chat messages in order of created_at
- id: string
  
  Unique identifier for the message e.g. 'claude_chat_msg_abcd1234'
- artifacts: array of object or null
  
  Versioned documents generated or updated by the assistant in this message. Download via GET /v1/compliance/apps/artifacts/{artifact_version_id}/content.
  - id: string
    
    Artifact ID e.g. 'claude_artifact_abc123'
  - artifact_type: string or null
    
    MIME-like artifact type e.g. 'application/vnd.ant.code'
  - title: string or null
    
    Artifact title
  - version_id: string
    
    Artifact version ID e.g. 'claude_artifact_version_abc123'
- content: array of Text or ToolUse or ToolResult
  
  Content blocks within the message
  - Text object
    
    Text content block.
    - type: "text"
      
      default: text
    - text: string
      
      Text content from human or assistant
    - thinking_redacted: boolean
      
      True when content enclosed in the assistant's internal-reasoning tags (or the tag markup itself) was removed from text during export. Removal never occurs with this field false. Always false on human messages, whose text is exported verbatim.
      
      default: false
    - truncated: boolean
      
      True when text was shortened by the server's fixed per-string bound (1 MiB). Always false on chat text blocks.
      
      default: false
  - ToolUse object
    
    Tool invocation requested by the assistant.
    - type: "tool_use"
      
      default: tool_use
    - id: string or null
      
      Tool-use ID, e.g. 'toolu_01AbC...'
    - input: string
      
      Arguments passed to the tool, as a JSON-encoded string. May be shortened — see the truncated field
    - integration_name: string or null
      
      Name of the integration that provides this tool, when applicable
    - mcp_server_url: string or null
      
      Base URL (scheme, host, and path only) of the MCP server that provides this tool, when applicable
    - name: string
      
      Name of the tool invoked
    - truncated: boolean
      
      True when input was shortened. Pass the endpoint's tool-use input max parameter as -1 to request full content, subject to any server-side maximum the endpoint enforces.
      
      default: false
  - ToolResult object
    
    Result returned by a tool invocation.
    - type: "tool_result"
      
      default: tool_result
    - content: array of object
      
      Text content returned by the tool. Generated files are surfaced via the message's generated_files list; other non-text item types (including images and links) are omitted.
      - type: "text"
        
        default: text
      - text: string
        
        Text returned by the tool
    - integration_name: string or null
      
      Name of the integration that provides this tool, when applicable
    - is_error: boolean
      
      True when the tool reported an error
    - mcp_server_url: string or null
      
      Base URL (scheme, host, and path only) of the MCP server that provides this tool, when applicable
    - name: string
      
      Name of the tool that produced this result
    - tool_use_id: string or null
      
      ID of the tool_use block this result responds to
    - truncated: boolean
      
      True when one or more text items in content were shortened. Pass the endpoint's tool-result max parameter as -1 to request full content, subject to any server-side maximum the endpoint enforces.
      
      default: false
- created_at: string
  
  Message creation timestamp - For human: when they sent the message, For assistant: when it completed the last content block
  
  format: date-time
- files: array of object or null
  
  Binary file attachments uploaded by the user. Download via GET /v1/compliance/apps/chats/files/{claude_file_id}/content.
  - id: string
    
    File ID
  - created_at: string
    
    File creation timestamp
    
    format: date-time
  - filename: string
    
    Display name of the file
  - md5: string or null
    
    Lowercase hex MD5 of the file's preferred downloadable variant, as recorded at upload time. Null when no stored hash is available.
  - mime_type: string or null
    
    MIME type of the file's preferred downloadable variant (e.g. 'application/pdf')
  - size_bytes: number or null
    
    Size in bytes of the file's preferred downloadable variant, if known. Null for older files uploaded before size was recorded.
- generated_files: array of object or null
  
  Downloadable files the assistant created via tool use (e.g. PDF, spreadsheet, slide deck). Distinct from files, which are uploads attached to the message. Download via GET /v1/compliance/apps/chats/generated-files/{claude_gen_file_id}/content.
  - id: string
    
    Opaque generated-file id, e.g. 'claude_gen_file_abc123'. Treat as an opaque string; the encoding may change without notice.
  - filename: string
    
    Display name of the generated file
  - md5: string or null
    
    Lowercase hex MD5 of the generated file, when available. Null when no stored hash is available.
  - mime_type: string or null
    
    MIME type reported by the tool that produced the file
  - size_bytes: number or null
    
    Size in bytes of the generated file, when available. Null when the file has expired or size is not recorded.
- role: "assistant" or "user"
  
  Message sender (user or assistant)
  - "assistant"
  - "user"
created_at: string

Creation timestamp

format: date-time
deleted_at: string or null

Deletion timestamp if deleted

format: date-time
first_id: string or null

Opaque pagination cursor for the first message in the current result set. Pass as before_id on the next request to page backwards. Clients should treat this value as an opaque string and not attempt to parse or interpret its contents, as the format may change without notice.
has_more: boolean

Whether more chat messages exist beyond the current result set. Use last_id as after_id in a follow-up request to page forward.

default: false
href: string

URL to view this chat in claude.ai
last_id: string or null

Opaque pagination cursor for the last message in the current result set. Pass as after_id on the next request to page forwards. Clients should treat this value as an opaque string and not attempt to parse or interpret its contents, as the format may change without notice.
model: string or null

Model selected for this chat (e.g. 'claude-opus-5'). May be null for legacy chats that never had a model recorded.
name: string

Chat name
organization_uuid: string

Organization UUID this chat belongs to
project_id: string or null

Project ID this chat belongs to
updated_at: string

Last update timestamp

format: date-time
user: object or null

The user who created the chat.

Null when the API key is restricted to one organization and the creator is no longer a member of it (for example, after they were removed from it).

A key for the whole parent organization returns the creator's id and current email_address for every chat; on the list endpoint, pass organization_ids[] to keep the results to one organization. For the email address the creator had when the chat was created, query GET /v1/compliance/activities with activity_types[]=claude_chat_created and a created_at window around the chat's created_at, find the event whose claude_chat_id matches this chat's id, and read actor.email_address. These events exist only for chats created after compliance logging was enabled for the organization.
- id: string
  
  User identifier
- email_address: string
  
  User's email address
organization_id: string

Deprecated

Organization ID this chat belongs to

# Example

bash

curl https://api.anthropic.com/v1/compliance/apps/chats/$CLAUDE_CHAT_ID/messages \
    -H 'anthropic-version: 2023-06-01' \
    -H "Authorization: Bearer $ANTHROPIC_COMPLIANCE_API_KEY"

# Response (200)

json

{
  "id": "claude_chat_abc123",
  "name": "Product Requirements Discussion",
  "created_at": "2025-06-07T08:09:10Z",
  "updated_at": "2025-06-07T08:09:11Z",
  "organization_id": "org_abc123",
  "organization_uuid": "abcdef01-2345-6789-abcd-ef0123456789",
  "project_id": "claude_proj_xyz789",
  "model": "claude-opus-5",
  "user": {
    "id": "user_xyz456",
    "email_address": "user@example.com"
  },
  "href": "https://claude.ai/chat/abcdef01-2345-6789-abcd-ef0123456789",
  "chat_messages": [
    {
      "id": "claude_chat_msg_abc123",
      "role": "user",
      "created_at": "2025-06-07T08:09:10Z",
      "content": [
        {
          "type": "text",
          "text": "Can you help me draft requirements for our new dashboard feature?"
        }
      ],
      "files": [
        {
          "id": "claude_file_xyz789",
          "filename": "dashboard_mockup_v1.pdf",
          "mime_type": "application/pdf",
          "size_bytes": 12345,
          "md5": "5d41402abc4b2a76b9719d911017c592",
          "created_at": "2025-06-07T08:09:10Z"
        }
      ]
    },
    {
      "id": "claude_chat_msg_def456",
      "role": "assistant",
      "created_at": "2025-06-07T08:09:11Z",
      "content": [
        {
          "type": "text",
          "text": "I'd be happy to help you draft requirements for your dashboard feature..."
        }
      ],
      "artifacts": [
        {
          "id": "claude_artifact_abc123",
          "version_id": "claude_artifact_version_xyz789",
          "title": "Dashboard Requirements Draft",
          "artifact_type": "text/markdown"
        }
      ]
    }
  ],
  "has_more": false,
  "first_id": "eyJtc2dfdXVpZCI6ICIwZjcwYjA2Ni0uLi4ifQ==",
  "last_id": "eyJtc2dfdXVpZCI6ICJhNGUwYjE3Mi0uLi4ifQ=="
}

# Domain types

# Message List Response

MessageListResponse object

A single message in a chat conversation.
- id: string
  
  Unique identifier for the message e.g. 'claude_chat_msg_abcd1234'
- artifacts: array of object or null
  
  Versioned documents generated or updated by the assistant in this message. Download via GET /v1/compliance/apps/artifacts/{artifact_version_id}/content.
  - id: string
    
    Artifact ID e.g. 'claude_artifact_abc123'
  - artifact_type: string or null
    
    MIME-like artifact type e.g. 'application/vnd.ant.code'
  - title: string or null
    
    Artifact title
  - version_id: string
    
    Artifact version ID e.g. 'claude_artifact_version_abc123'
- content: array of Text or ToolUse or ToolResult
  
  Content blocks within the message
  - Text object
    
    Text content block.
    - type: "text"
      
      default: text
    - text: string
      
      Text content from human or assistant
    - thinking_redacted: boolean
      
      True when content enclosed in the assistant's internal-reasoning tags (or the tag markup itself) was removed from text during export. Removal never occurs with this field false. Always false on human messages, whose text is exported verbatim.
      
      default: false
    - truncated: boolean
      
      True when text was shortened by the server's fixed per-string bound (1 MiB). Always false on chat text blocks.
      
      default: false
  - ToolUse object
    
    Tool invocation requested by the assistant.
    - type: "tool_use"
      
      default: tool_use
    - id: string or null
      
      Tool-use ID, e.g. 'toolu_01AbC...'
    - input: string
      
      Arguments passed to the tool, as a JSON-encoded string. May be shortened — see the truncated field
    - integration_name: string or null
      
      Name of the integration that provides this tool, when applicable
    - mcp_server_url: string or null
      
      Base URL (scheme, host, and path only) of the MCP server that provides this tool, when applicable
    - name: string
      
      Name of the tool invoked
    - truncated: boolean
      
      True when input was shortened. Pass the endpoint's tool-use input max parameter as -1 to request full content, subject to any server-side maximum the endpoint enforces.
      
      default: false
  - ToolResult object
    
    Result returned by a tool invocation.
    - type: "tool_result"
      
      default: tool_result
    - content: array of object
      
      Text content returned by the tool. Generated files are surfaced via the message's generated_files list; other non-text item types (including images and links) are omitted.
      - type: "text"
        
        default: text
      - text: string
        
        Text returned by the tool
    - integration_name: string or null
      
      Name of the integration that provides this tool, when applicable
    - is_error: boolean
      
      True when the tool reported an error
    - mcp_server_url: string or null
      
      Base URL (scheme, host, and path only) of the MCP server that provides this tool, when applicable
    - name: string
      
      Name of the tool that produced this result
    - tool_use_id: string or null
      
      ID of the tool_use block this result responds to
    - truncated: boolean
      
      True when one or more text items in content were shortened. Pass the endpoint's tool-result max parameter as -1 to request full content, subject to any server-side maximum the endpoint enforces.
      
      default: false
- created_at: string
  
  Message creation timestamp - For human: when they sent the message, For assistant: when it completed the last content block
  
  format: date-time
- files: array of object or null
  
  Binary file attachments uploaded by the user. Download via GET /v1/compliance/apps/chats/files/{claude_file_id}/content.
  - id: string
    
    File ID
  - created_at: string
    
    File creation timestamp
    
    format: date-time
  - filename: string
    
    Display name of the file
  - md5: string or null
    
    Lowercase hex MD5 of the file's preferred downloadable variant, as recorded at upload time. Null when no stored hash is available.
  - mime_type: string or null
    
    MIME type of the file's preferred downloadable variant (e.g. 'application/pdf')
  - size_bytes: number or null
    
    Size in bytes of the file's preferred downloadable variant, if known. Null for older files uploaded before size was recorded.
- generated_files: array of object or null
  
  Downloadable files the assistant created via tool use (e.g. PDF, spreadsheet, slide deck). Distinct from files, which are uploads attached to the message. Download via GET /v1/compliance/apps/chats/generated-files/{claude_gen_file_id}/content.
  - id: string
    
    Opaque generated-file id, e.g. 'claude_gen_file_abc123'. Treat as an opaque string; the encoding may change without notice.
  - filename: string
    
    Display name of the generated file
  - md5: string or null
    
    Lowercase hex MD5 of the generated file, when available. Null when no stored hash is available.
  - mime_type: string or null
    
    MIME type reported by the tool that produced the file
  - size_bytes: number or null
    
    Size in bytes of the generated file, when available. Null when the file has expired or size is not recorded.
- role: "assistant" or "user"
  
  Message sender (user or assistant)
  - "assistant"
  - "user"

spb doc-api

# title: Messages url: https://platform.claude.com/docs/en/api/compliance/apps/chats/messages

# Messages

# Get chat messages

# Path parameters

# Query parameters

# Headers

# Returns

# Example

# Response (200)

# Domain types

# Message List Response

Theme