openapi: 3.1.0
info:
  title: Customer.io Pipelines API
  description: >-
    The Customer.io Pipelines API is the newer data ingestion interface for
    getting customer and event data into Customer.io. It follows the Segment
    spec and supports identify, track, page, screen, group, and alias calls.
    Customer.io recommends the Pipelines API for new integrations because it
    is easier to use, supports outbound data integrations and
    transformations, and is the focus of ongoing development. It uses a CDP
    API key for authentication and provides a modern alternative to the
    legacy Track API.
  version: '1.0.0'
  contact:
    name: Customer.io Support
    url: https://customer.io/contact
  termsOfService: https://customer.io/legal/terms-of-service
externalDocs:
  description: Pipelines API Documentation
  url: https://docs.customer.io/integrations/data-in/connections/http-api/
servers:
  - url: https://cdp.customer.io/v1
    description: US Production Server
  - url: https://cdp-eu.customer.io/v1
    description: EU Production Server
tags:
  - name: Alias
    description: >-
      Merge two user identities by creating an alias linking a new identity
      to an existing one.
  - name: Batch
    description: >-
      Send multiple API calls in a single request for improved performance.
  - name: Group
    description: >-
      Associate people with groups or organizations.
  - name: Identify
    description: >-
      Identify people and set their profile attributes. The identify call
      tells Customer.io who the current user is and assigns traits to them.
  - name: Page
    description: >-
      Record page views from web applications.
  - name: Screen
    description: >-
      Record screen views from mobile applications.
  - name: Track
    description: >-
      Track events to record actions people take in your app or on your
      website.
security:
  - basicAuth: []
paths:
  /identify:
    post:
      operationId: identifyPerson
      summary: Identify a person
      description: >-
        Identifies a person and sets their profile attributes. Use this call
        when a user creates an account, logs in, or updates their profile.
        Requires at least one of userId or anonymousId. Traits are saved as
        profile attributes.
      tags:
        - Identify
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/IdentifyRequest'
      responses:
        '200':
          description: Person identified successfully.
        '400':
          description: Bad request. Missing required fields.
        '401':
          description: Unauthorized. Invalid CDP API key.
  /track:
    post:
      operationId: trackEvent
      summary: Track an event
      description: >-
        Records an event that a person performed. Every track call requires
        an event name and at least one of userId or anonymousId. Event
        properties provide additional context about the action.
      tags:
        - Track
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TrackRequest'
      responses:
        '200':
          description: Event tracked successfully.
        '400':
          description: Bad request. Missing event name or identifiers.
        '401':
          description: Unauthorized. Invalid CDP API key.
  /page:
    post:
      operationId: trackPageView
      summary: Track a page view
      description: >-
        Records a page view event from a web application. Use this when a
        user views a page on your website. Requires at least one of userId or
        anonymousId.
      tags:
        - Page
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/PageRequest'
      responses:
        '200':
          description: Page view tracked successfully.
        '400':
          description: Bad request. Missing required fields.
        '401':
          description: Unauthorized. Invalid CDP API key.
  /screen:
    post:
      operationId: trackScreenView
      summary: Track a screen view
      description: >-
        Records a screen view event from a mobile application. Use this when
        a user views a screen in your mobile app. Requires at least one of
        userId or anonymousId.
      tags:
        - Screen
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ScreenRequest'
      responses:
        '200':
          description: Screen view tracked successfully.
        '400':
          description: Bad request. Missing required fields.
        '401':
          description: Unauthorized. Invalid CDP API key.
  /group:
    post:
      operationId: groupPerson
      summary: Associate a person with a group
      description: >-
        Associates a person with a group or organization. Requires a groupId
        and at least one of userId or anonymousId. Group traits set
        attributes on the group.
      tags:
        - Group
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/GroupRequest'
      responses:
        '200':
          description: Person grouped successfully.
        '400':
          description: Bad request. Missing groupId.
        '401':
          description: Unauthorized. Invalid CDP API key.
  /alias:
    post:
      operationId: aliasPerson
      summary: Alias a person
      description: >-
        Creates an alias linking a new identity to an existing one. This
        merges two user identities so all future events from either identity
        are associated with the same person. Requires a previousId and a
        userId.
      tags:
        - Alias
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AliasRequest'
      responses:
        '200':
          description: Alias created successfully.
        '400':
          description: Bad request. Missing previousId.
        '401':
          description: Unauthorized. Invalid CDP API key.
  /batch:
    post:
      operationId: batchCalls
      summary: Send a batch of API calls
      description: >-
        Sends multiple API calls in a single HTTP request. Each item in the
        batch array is a standard identify, track, page, screen, group, or
        alias call. The batch request must be smaller than 1MB.
      tags:
        - Batch
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/BatchRequest'
      responses:
        '200':
          description: Batch processed successfully.
        '400':
          description: Bad request. Invalid payload or exceeds size limit.
        '401':
          description: Unauthorized. Invalid CDP API key.
components:
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
      description: >-
        Basic authentication using your CDP API key as the username with a
        blank password.
  schemas:
    IdentifyRequest:
      type: object
      description: >-
        An identify call that assigns traits to a person.
      properties:
        userId:
          type: string
          description: >-
            The unique user identifier in your system.
        anonymousId:
          type: string
          description: >-
            An anonymous identifier for the user.
        traits:
          type: object
          description: >-
            Attributes to set on the person profile. Common traits include
            email, name, and plan.
          additionalProperties: true
          properties:
            email:
              type: string
              format: email
              description: >-
                The person email address.
            name:
              type: string
              description: >-
                The person full name.
            first_name:
              type: string
              description: >-
                The person first name.
            last_name:
              type: string
              description: >-
                The person last name.
            phone:
              type: string
              description: >-
                The person phone number.
            created_at:
              type: string
              format: date-time
              description: >-
                When the person account was created.
        context:
          $ref: '#/components/schemas/Context'
        timestamp:
          type: string
          format: date-time
          description: >-
            ISO 8601 timestamp of when the identify call was made.
        messageId:
          type: string
          description: >-
            A unique identifier for this message for deduplication.
    TrackRequest:
      type: object
      required:
        - event
      description: >-
        A track call that records an event.
      properties:
        userId:
          type: string
          description: >-
            The unique user identifier in your system.
        anonymousId:
          type: string
          description: >-
            An anonymous identifier for the user.
        event:
          type: string
          description: >-
            The name of the event to track.
        properties:
          type: object
          description: >-
            Additional properties associated with the event.
          additionalProperties: true
        context:
          $ref: '#/components/schemas/Context'
        timestamp:
          type: string
          format: date-time
          description: >-
            ISO 8601 timestamp of when the event occurred.
        messageId:
          type: string
          description: >-
            A unique identifier for this message for deduplication.
    PageRequest:
      type: object
      description: >-
        A page call that records a page view.
      properties:
        userId:
          type: string
          description: >-
            The unique user identifier in your system.
        anonymousId:
          type: string
          description: >-
            An anonymous identifier for the user.
        name:
          type: string
          description: >-
            The name of the page viewed.
        properties:
          type: object
          description: >-
            Properties of the page such as URL, title, and referrer.
          additionalProperties: true
          properties:
            url:
              type: string
              format: uri
              description: >-
                The full URL of the page.
            title:
              type: string
              description: >-
                The page title.
            referrer:
              type: string
              format: uri
              description: >-
                The referrer URL.
            path:
              type: string
              description: >-
                The URL path.
        context:
          $ref: '#/components/schemas/Context'
        timestamp:
          type: string
          format: date-time
          description: >-
            ISO 8601 timestamp of when the page view occurred.
        messageId:
          type: string
          description: >-
            A unique identifier for this message for deduplication.
    ScreenRequest:
      type: object
      description: >-
        A screen call that records a mobile screen view.
      properties:
        userId:
          type: string
          description: >-
            The unique user identifier in your system.
        anonymousId:
          type: string
          description: >-
            An anonymous identifier for the user.
        name:
          type: string
          description: >-
            The name of the screen viewed.
        properties:
          type: object
          description: >-
            Properties of the screen view.
          additionalProperties: true
        context:
          $ref: '#/components/schemas/Context'
        timestamp:
          type: string
          format: date-time
          description: >-
            ISO 8601 timestamp of when the screen view occurred.
        messageId:
          type: string
          description: >-
            A unique identifier for this message for deduplication.
    GroupRequest:
      type: object
      required:
        - groupId
      description: >-
        A group call that associates a person with a group.
      properties:
        userId:
          type: string
          description: >-
            The unique user identifier in your system.
        anonymousId:
          type: string
          description: >-
            An anonymous identifier for the user.
        groupId:
          type: string
          description: >-
            The unique group identifier.
        traits:
          type: object
          description: >-
            Attributes to set on the group.
          additionalProperties: true
          properties:
            name:
              type: string
              description: >-
                The group name.
            industry:
              type: string
              description: >-
                The group industry.
            plan:
              type: string
              description: >-
                The group subscription plan.
        context:
          $ref: '#/components/schemas/Context'
        timestamp:
          type: string
          format: date-time
          description: >-
            ISO 8601 timestamp of when the group call was made.
        messageId:
          type: string
          description: >-
            A unique identifier for this message for deduplication.
    AliasRequest:
      type: object
      required:
        - previousId
        - userId
      description: >-
        An alias call that links two user identities.
      properties:
        userId:
          type: string
          description: >-
            The new user identifier.
        previousId:
          type: string
          description: >-
            The previous user identifier to merge with the new one.
        context:
          $ref: '#/components/schemas/Context'
        timestamp:
          type: string
          format: date-time
          description: >-
            ISO 8601 timestamp of when the alias was created.
        messageId:
          type: string
          description: >-
            A unique identifier for this message for deduplication.
    BatchRequest:
      type: object
      required:
        - batch
      description: >-
        A batch of API calls. The request must be smaller than 1MB. Individual
        calls in the batch are limited to 64KB each.
      properties:
        batch:
          type: array
          description: >-
            An array of API calls. Each item should include a type field
            indicating the call type (identify, track, page, screen, group,
            or alias) along with the standard fields for that call type.
          items:
            type: object
            required:
              - type
            properties:
              type:
                type: string
                description: >-
                  The type of API call.
                enum:
                  - identify
                  - track
                  - page
                  - screen
                  - group
                  - alias
            additionalProperties: true
    Context:
      type: object
      description: >-
        Contextual information about the API call. Contains information about
        the device, library, and other environmental details.
      properties:
        ip:
          type: string
          description: >-
            The IP address of the user.
        locale:
          type: string
          description: >-
            The locale of the user.
        timezone:
          type: string
          description: >-
            The timezone of the user.
        userAgent:
          type: string
          description: >-
            The user agent string.
        library:
          type: object
          description: >-
            Information about the library making the call.
          properties:
            name:
              type: string
              description: >-
                The library name.
            version:
              type: string
              description: >-
                The library version.
        device:
          type: object
          description: >-
            Information about the user device.
          properties:
            id:
              type: string
              description: >-
                The device identifier.
            manufacturer:
              type: string
              description: >-
                The device manufacturer.
            model:
              type: string
              description: >-
                The device model.
            type:
              type: string
              description: >-
                The device type.
        os:
          type: object
          description: >-
            Information about the user operating system.
          properties:
            name:
              type: string
              description: >-
                The operating system name.
            version:
              type: string
              description: >-
                The operating system version.
        page:
          type: object
          description: >-
            Information about the current page for web contexts.
          properties:
            url:
              type: string
              format: uri
              description: >-
                The page URL.
            title:
              type: string
              description: >-
                The page title.
            referrer:
              type: string
              format: uri
              description: >-
                The referring URL.
            path:
              type: string
              description: >-
                The page path.