Conversation history

Returns a summary list of the authenticated user’s most recent causal chat sessions, each with a preview of the last message. Use this endpoint to populate history panels or session pickers in your integration.

To retrieve the full message list for a specific session, use GET /api/causal-chat/sessions/.

Endpoint

GET /api/causal-chat/history

Authentication

Required. Include a session cookie or Authorization: Bearer <token> header. Unauthenticated requests return 401 Unauthorized.

Request

This endpoint accepts no query parameters or request body.

Headers

Authorization

string

required

Bearer token for API authentication. Format: Bearer <token>.

Response

Status: 200 OK
Content-Type: application/json Returns a list of recent sessions, each containing metadata and a preview of the last message. Sessions are ordered by most recently updated first.

sessions

object[]

required

Array of recent session objects.

Hide session properties

string

required

UUID identifying the session. Pass this as sessionId in subsequent POST /api/causal-chat requests to continue the conversation.

title

string

required

Title of the session, derived from the first question asked.

updated_at

string

required

ISO 8601 timestamp of the most recent message in the session.

domain_classified

string

Primary domain label for the session, e.g. "neuroscience" or "economics". May be null if the first message has not yet been classified.

last_message

object

Preview of the most recent message in the session.

Show last_message properties

role

string

required

Role of the last message author: "user" or "assistant".

content_preview

string

required

Truncated content of the last message, suitable for display in a list view.

created_at

string

required

ISO 8601 timestamp when the last message was created.

Examples

curl --request GET \
  --url https://wuweism.com/api/causal-chat/history \
  --header 'Authorization: Bearer <token>'

const response = await fetch('https://wuweism.com/api/causal-chat/history', {
  headers: {
    'Authorization': 'Bearer <token>',
  },
});
const data = await response.json();
console.log(data.sessions);

import requests

response = requests.get(
    'https://wuweism.com/api/causal-chat/history',
    headers={'Authorization': 'Bearer <token>'},
)
data = response.json()
print(data['sessions'])

200

{
  "sessions": [
    {
      "id": "3f2504e0-4f89-11d3-9a0c-0305e82c3301",
      "title": "Does cortisol exposure causally increase hippocampal volume reduction?",
      "updated_at": "2026-04-05T14:32:00Z",
      "domain_classified": "neuroscience",
      "last_message": {
        "role": "assistant",
        "content_preview": "Yes. The causal pathway from elevated cortisol to hippocampal volume reduction is well-supported...",
        "created_at": "2026-04-05T14:32:00Z"
      }
    },
    {
      "id": "6ba7b810-9dad-11d1-80b4-00c04fd430c8",
      "title": "What is the causal effect of sleep deprivation on reaction time?",
      "updated_at": "2026-04-04T09:15:00Z",
      "domain_classified": "cognitive_science",
      "last_message": {
        "role": "user",
        "content_preview": "Can you break down the adjustment set used in that analysis?",
        "created_at": "2026-04-04T09:15:00Z"
      }
    }
  ]
}

Error responses

Status	Description
`401`	Missing or invalid authentication credentials.

​Endpoint

​Authentication

​Request

​Headers

​Response

​Examples

​Error responses

Endpoint

Authentication

Request

Headers

Response

Examples

Error responses