> ## Documentation Index
> Fetch the complete documentation index at: https://docs.recoupable.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# List Session Chats

> Lists every chat in the given session as a `ChatSummary` (chat row plus per-account `hasUnread` and `isStreaming` flags), along with the caller's default model id. Chats are sorted by `createdAt` ascending.



## OpenAPI

````yaml api-reference/openapi/sessions.json GET /api/sessions/{sessionId}/chats
openapi: 3.1.0
info:
  title: Recoup API - Sessions
  description: >-
    Sessions — sandboxed runs of an LLM-driven agent with tool use, lifecycle
    hooks, and persistence. Each session pairs one Vercel Sandbox with one or
    more chat threads.
  license:
    name: MIT
  version: 1.0.0
servers:
  - url: https://api.recoupable.dev
security:
  - ApiKeyAuth: []
  - BearerAuth: []
paths:
  /api/sessions/{sessionId}/chats:
    get:
      summary: List session chats
      description: >-
        Lists every chat in the given session as a `ChatSummary` (chat row plus
        per-account `hasUnread` and `isStreaming` flags), along with the
        caller's default model id. Chats are sorted by `createdAt` ascending.
      parameters:
        - name: sessionId
          in: path
          required: true
          description: The id of the parent session.
          schema:
            type: string
      responses:
        '200':
          description: Chats retrieved successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ListSessionChatsResponse'
        '401':
          description: Unauthorized — invalid or missing API key / Bearer token.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '403':
          description: Forbidden — the authenticated account does not own this session.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '404':
          description: Not found — no session exists with the given id.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
components:
  schemas:
    ListSessionChatsResponse:
      type: object
      required:
        - chats
        - defaultModelId
      properties:
        chats:
          type: array
          description: Every chat in the session, sorted by `createdAt` ascending.
          items:
            $ref: '#/components/schemas/ChatSummary'
        defaultModelId:
          type: string
          description: >-
            Default model id surfaced to clients with no explicit preference
            (e.g. `openai/gpt-5.4`).
    Error:
      type: object
      required:
        - status
        - error
      properties:
        status:
          type: string
          enum:
            - error
          description: Always `"error"` for error responses.
        error:
          type: string
          description: Human-readable error message.
    ChatSummary:
      type: object
      description: >-
        Chat row enriched with per-account `hasUnread` and computed
        `isStreaming` flags for chat-list rendering.
      required:
        - id
        - sessionId
        - title
        - createdAt
        - updatedAt
        - hasUnread
        - isStreaming
      properties:
        id:
          type: string
        sessionId:
          type: string
        title:
          type: string
        modelId:
          type: string
          nullable: true
        activeStreamId:
          type: string
          nullable: true
        lastAssistantMessageAt:
          type: string
          format: date-time
          nullable: true
        createdAt:
          type: string
          format: date-time
        updatedAt:
          type: string
          format: date-time
        hasUnread:
          type: boolean
          description: >-
            True when `lastAssistantMessageAt` is newer than the caller's
            `chat_reads.last_read_at` (or no read row exists yet).
        isStreaming:
          type: boolean
          description: True when `activeStreamId` is non-null.
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: x-api-key
    BearerAuth:
      type: http
      scheme: bearer

````