IAB Tech Lab

IAB Tech Lab Sessions API

Multi-turn buyer conversation sessions

Documentation GitHub OpenAPI

Operations 5

POST /sessions Create Session #

GET /sessions List Sessions #

GET /sessions/{session_id} Get Session #

POST /sessions/{session_id}/messages Send Session Message #

POST /sessions/{session_id}/close Close Session Endpoint #

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OpenAPI Specification

openapi: 3.2.0
info:
  title: Ad Seller System Sessions API
  description: IAB OpenDirect 2.1 compliant seller agent for programmatic advertising. Supports product discovery, tiered pricing, proposal evaluation, multi-round negotiation, deal execution, order management, and change requests.
  contact:
    name: IAB Tech Lab
    url: https://iabtechlab.com/
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
  version: 1.0.0
tags:
- name: Sessions
  description: Multi-turn buyer conversation sessions
paths:
  /sessions:
    post:
      tags:
      - Sessions
      summary: Create Session
      description: Create a new buyer conversation session.
      operationId: create_session_sessions_post
      parameters:
      - name: authorization
        in: header
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Authorization
      - name: X-Api-Key
        in: header
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: X-Api-Key
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateSessionRequest'
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
    get:
      tags:
      - Sessions
      summary: List Sessions
      description: List sessions, optionally filtered by buyer identity or status.
      operationId: list_sessions_sessions_get
      parameters:
      - name: buyer_key
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Buyer Key
      - name: status
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Status
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
  /sessions/{session_id}:
    get:
      tags:
      - Sessions
      summary: Get Session
      description: Get session details and conversation history.
      operationId: get_session_sessions__session_id__get
      parameters:
      - name: session_id
        in: path
        required: true
        schema:
          type: string
          title: Session Id
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
  /sessions/{session_id}/messages:
    post:
      tags:
      - Sessions
      summary: Send Session Message
      description: Send a message within a session and get a response.
      operationId: send_session_message_sessions__session_id__messages_post
      parameters:
      - name: session_id
        in: path
        required: true
        schema:
          type: string
          title: Session Id
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SessionMessageRequest'
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
  /sessions/{session_id}/close:
    post:
      tags:
      - Sessions
      summary: Close Session Endpoint
      description: Close a session.
      operationId: close_session_endpoint_sessions__session_id__close_post
      parameters:
      - name: session_id
        in: path
        required: true
        schema:
          type: string
          title: Session Id
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
components:
  schemas:
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
            - type: string
            - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
      - loc
      - msg
      - type
      title: ValidationError
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    CreateSessionRequest:
      properties:
        seat_id:
          anyOf:
          - type: string
          - type: 'null'
          title: Seat Id
        agency_id:
          anyOf:
          - type: string
          - type: 'null'
          title: Agency Id
        advertiser_id:
          anyOf:
          - type: string
          - type: 'null'
          title: Advertiser Id
        is_authenticated:
          type: boolean
          title: Is Authenticated
          default: false
        agent_url:
          anyOf:
          - type: string
          - type: 'null'
          title: Agent Url
      type: object
      title: CreateSessionRequest
      description: Request to create a new session.
    SessionMessageRequest:
      properties:
        message:
          type: string
          title: Message
      type: object
      required:
      - message
      title: SessionMessageRequest
      description: Request to send a message within a session.

IAB Tech Lab Sessions API

Operations 5

Documentation

Specifications

Schemas & Data

Other Resources