Willo Participants (Candidates) API

openapi: 3.0.3
info:
  title: Willo Integration API V2
  description: >-
    The Willo Integration API V2 exposes the actions that can be carried out in
    the Willo asynchronous ("one-way") video interviewing platform as a public
    REST API, so you can add video interviewing to a job board, ATS, CRM, or
    staffing platform. Resources include Departments (called "Companies" in the
    UI), Interviews (the set of pre-defined questions a participant answers -
    typically a "job" in an ATS), Participants (candidates - no login or app
    required), their video Responses and identity-verification media, Message
    Templates (invite/reminder/success email and SMS), Users, Webhooks, Interview
    Templates, and Child Organisations. Authentication is by API key ("integration
    key") passed in the Authorization header; each user has their own key from the
    Willo Integrations page. All requests must be made over HTTPS.

    Endpoint paths, HTTP methods, authentication, status codes, webhook triggers,
    and the two host environments below are confirmed from Willo's published
    Postman API reference. Request and response body schemas are modeled from the
    documented resource glossary and are illustrative; confirm exact field names
    and shapes against the live Willo reference before production use.
  version: '2.0'
  contact:
    name: Willo
    url: https://www.willo.video/api
  termsOfService: https://www.willo.video/terms
servers:
  - url: https://api.willotalent.com/api/integrations/v2
    description: Production
  - url: https://api.stage.willotalent.com/api/integrations/v2
    description: Staging
security:
  - apiKeyAuth: []
tags:
  - name: Departments
    description: Sub-divisions of the account (shown as "Companies" in the UI), each with its own branding.
  - name: Interviews
    description: A named set of pre-defined questions a participant answers; typically a "job" in an ATS.
  - name: Participants
    description: Candidates invited to an interview - no download, login, or authentication required.
  - name: Message Templates
    description: Invite, reminder, and success email/SMS templates sent to participants.
  - name: Users
    description: Authenticated team members (Owner, Admin, Standard) with access to interviews and participants.
  - name: Webhooks
    description: Notifications posted to a third-party endpoint on new response, stage change, new comment, or new score.
  - name: Interview Templates
    description: Pre-built interview templates and their categories, used to create interviews quickly.
  - name: Child Organisations
    description: Organisations created under a parent organisation, inheriting its properties but managed independently.
  - name: Reference
    description: Read-only reference data - languages and IDV countries of employment.
paths:
  /departments/:
    get:
      operationId: listDepartments
      tags: [Departments]
      summary: List Departments
      description: Lists the departments (Companies) in the account the API key can access.
      responses:
        '200':
          description: A list of departments.
          content:
            application/json:
              schema:
                type: object
                properties:
                  results:
                    type: array
                    items:
                      $ref: '#/components/schemas/Department'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createDepartment
      tags: [Departments]
      summary: Create Department
      description: Creates a new department (Company), optionally with its own branding.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/DepartmentInput'
      responses:
        '201':
          description: The created department.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Department'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /departments/{key}/:
    parameters:
      - $ref: '#/components/parameters/Key'
    get:
      operationId: getDepartment
      tags: [Departments]
      summary: Department Details
      description: Retrieves a single department by its key.
      responses:
        '200':
          description: The requested department.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Department'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    put:
      operationId: replaceDepartment
      tags: [Departments]
      summary: Update Department (PUT)
      description: Fully replaces a department.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/DepartmentInput'
      responses:
        '200':
          description: The updated department.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Department'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    patch:
      operationId: updateDepartment
      tags: [Departments]
      summary: Update Department (PATCH)
      description: Partially updates a department.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/DepartmentInput'
      responses:
        '200':
          description: The updated department.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Department'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteDepartment
      tags: [Departments]
      summary: Delete Department
      description: Deletes a department.
      responses:
        '204':
          description: The department was deleted.
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /interviews/:
    get:
      operationId: listInterviews
      tags: [Interviews]
      summary: List Interviews
      description: Lists interviews (jobs) accessible to the API key.
      responses:
        '200':
          description: A list of interviews.
          content:
            application/json:
              schema:
                type: object
                properties:
                  results:
                    type: array
                    items:
                      $ref: '#/components/schemas/Interview'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createInterview
      tags: [Interviews]
      summary: Create Interview
      description: Creates an interview with a list of pre-defined questions.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/InterviewInput'
      responses:
        '201':
          description: The created interview.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Interview'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /interviews/{key}/:
    parameters:
      - $ref: '#/components/parameters/Key'
    get:
      operationId: getInterview
      tags: [Interviews]
      summary: Interview Details
      description: Retrieves a single interview, including its questions.
      responses:
        '200':
          description: The requested interview.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Interview'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    put:
      operationId: replaceInterview
      tags: [Interviews]
      summary: Update Interview (PUT)
      description: Fully replaces an interview.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/InterviewInput'
      responses:
        '200':
          description: The updated interview.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Interview'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    patch:
      operationId: updateInterview
      tags: [Interviews]
      summary: Update Interview (PATCH)
      description: Partially updates an interview.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/InterviewInput'
      responses:
        '200':
          description: The updated interview.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Interview'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteInterview
      tags: [Interviews]
      summary: Delete Interview
      description: Deletes an interview.
      responses:
        '204':
          description: The interview was deleted.
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /participants/:
    get:
      operationId: listParticipants
      tags: [Participants]
      summary: List Participants
      description: Lists participants (candidates) accessible to the API key.
      responses:
        '200':
          description: A list of participants.
          content:
            application/json:
              schema:
                type: object
                properties:
                  results:
                    type: array
                    items:
                      $ref: '#/components/schemas/Participant'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: inviteParticipant
      tags: [Participants]
      summary: Invite Participant
      description: >-
        Invites a participant to an interview. An invite (and optional reminder)
        email/SMS is sent based on the interview's message templates.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ParticipantInput'
      responses:
        '201':
          description: The invited participant.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Participant'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /participants/{key}/:
    parameters:
      - $ref: '#/components/parameters/Key'
    get:
      operationId: getParticipant
      tags: [Participants]
      summary: Participant Details
      description: >-
        Retrieves a single participant, including their video responses when the
        interview has been completed.
      responses:
        '200':
          description: The requested participant.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Participant'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    put:
      operationId: replaceParticipant
      tags: [Participants]
      summary: Update Participant (PUT)
      description: Fully replaces a participant.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ParticipantInput'
      responses:
        '200':
          description: The updated participant.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Participant'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    patch:
      operationId: updateParticipant
      tags: [Participants]
      summary: Update Participant (PATCH)
      description: Partially updates a participant (for example, to change their stage).
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ParticipantInput'
      responses:
        '200':
          description: The updated participant.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Participant'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteParticipant
      tags: [Participants]
      summary: Delete Participant
      description: Deletes a participant.
      responses:
        '204':
          description: The participant was deleted.
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /participants/{key}/idv-info/:
    parameters:
      - $ref: '#/components/parameters/Key'
    get:
      operationId: getParticipantIdvInfo
      tags: [Participants]
      summary: Participant Identity Verification Details
      description: Retrieves the identity-verification (IDV) result and metadata for a participant.
      responses:
        '200':
          description: The participant's IDV details.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/IdvInfo'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /participants/{key}/idv-media/:
    parameters:
      - $ref: '#/components/parameters/Key'
    get:
      operationId: getParticipantIdvMedia
      tags: [Participants]
      summary: Participant Identity Verification Media
      description: Retrieves the identity-verification media (for example, document and selfie images) for a participant.
      responses:
        '200':
          description: The participant's IDV media references.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/IdvMedia'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /message-templates/:
    get:
      operationId: listMessageTemplates
      tags: [Message Templates]
      summary: List Templates
      description: Lists the invite, reminder, and success message templates in the account.
      responses:
        '200':
          description: A list of message templates.
          content:
            application/json:
              schema:
                type: object
                properties:
                  results:
                    type: array
                    items:
                      $ref: '#/components/schemas/MessageTemplate'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createMessageTemplate
      tags: [Message Templates]
      summary: Create Template
      description: Creates a new message template.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/MessageTemplateInput'
      responses:
        '201':
          description: The created message template.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/MessageTemplate'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /message-templates/{key}/:
    parameters:
      - $ref: '#/components/parameters/Key'
    get:
      operationId: getMessageTemplate
      tags: [Message Templates]
      summary: Template Details
      description: Retrieves a single message template.
      responses:
        '200':
          description: The requested message template.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/MessageTemplate'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    put:
      operationId: replaceMessageTemplate
      tags: [Message Templates]
      summary: Update Message Template (PUT)
      description: Fully replaces a message template.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/MessageTemplateInput'
      responses:
        '200':
          description: The updated message template.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/MessageTemplate'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    patch:
      operationId: updateMessageTemplate
      tags: [Message Templates]
      summary: Update Message Template (PATCH)
      description: Partially updates a message template.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/MessageTemplateInput'
      responses:
        '200':
          description: The updated message template.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/MessageTemplate'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteMessageTemplate
      tags: [Message Templates]
      summary: Delete Message Template
      description: Deletes a message template.
      responses:
        '204':
          description: The message template was deleted.
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /users/:
    get:
      operationId: listUsers
      tags: [Users]
      summary: List Users
      description: Lists the users (Owner, Admin, Standard) in the account.
      responses:
        '200':
          description: A list of users.
          content:
            application/json:
              schema:
                type: object
                properties:
                  results:
                    type: array
                    items:
                      $ref: '#/components/schemas/User'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: inviteUser
      tags: [Users]
      summary: Invite User
      description: Invites a new user to the account with a given role.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/UserInput'
      responses:
        '201':
          description: The invited user.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/User'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /users/{key}/:
    parameters:
      - $ref: '#/components/parameters/Key'
    get:
      operationId: getUser
      tags: [Users]
      summary: User Details
      description: Retrieves a single user.
      responses:
        '200':
          description: The requested user.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/User'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    patch:
      operationId: updateUser
      tags: [Users]
      summary: Update User (PATCH)
      description: Partially updates a user (for example, their role or permissions).
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/UserInput'
      responses:
        '200':
          description: The updated user.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/User'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteUser
      tags: [Users]
      summary: Delete User
      description: Removes a user from the account.
      responses:
        '204':
          description: The user was deleted.
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /webhooks/:
    get:
      operationId: listWebhooks
      tags: [Webhooks]
      summary: List Webhooks
      description: Lists the configured webhook subscriptions.
      responses:
        '200':
          description: A list of webhooks.
          content:
            application/json:
              schema:
                type: object
                properties:
                  results:
                    type: array
                    items:
                      $ref: '#/components/schemas/Webhook'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createWebhook
      tags: [Webhooks]
      summary: Create Webhook
      description: >-
        Subscribes a third-party endpoint to a Willo event trigger - New Response,
        Stage Change, New Comment, or New Score.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/WebhookInput'
      responses:
        '201':
          description: The created webhook.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Webhook'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /webhooks/{key}/:
    parameters:
      - $ref: '#/components/parameters/Key'
    put:
      operationId: replaceWebhook
      tags: [Webhooks]
      summary: Update Webhook (PUT)
      description: Fully replaces a webhook subscription.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/WebhookInput'
      responses:
        '200':
          description: The updated webhook.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Webhook'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    patch:
      operationId: updateWebhook
      tags: [Webhooks]
      summary: Update Webhook (PATCH)
      description: Partially updates a webhook subscription.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/WebhookInput'
      responses:
        '200':
          description: The updated webhook.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Webhook'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteWebhook
      tags: [Webhooks]
      summary: Delete Webhook
      description: Deletes a webhook subscription.
      responses:
        '204':
          description: The webhook was deleted.
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /categories/:
    get:
      operationId: listCategories
      tags: [Interview Templates]
      summary: List Categories
      description: Lists the categories used to organise Willo's interview templates.
      responses:
        '200':
          description: A list of categories.
          content:
            application/json:
              schema:
                type: object
                properties:
                  results:
                    type: array
                    items:
                      $ref: '#/components/schemas/Category'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /interview-templates/:
    get:
      operationId: listInterviewTemplates
      tags: [Interview Templates]
      summary: List Templates
      description: Lists the available pre-built interview templates.
      responses:
        '200':
          description: A list of interview templates.
          content:
            application/json:
              schema:
                type: object
                properties:
                  results:
                    type: array
                    items:
                      $ref: '#/components/schemas/InterviewTemplate'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /interview-templates/{key}/:
    parameters:
      - $ref: '#/components/parameters/Key'
    get:
      operationId: getInterviewTemplate
      tags: [Interview Templates]
      summary: Get Template Details
      description: Retrieves a single interview template, including its questions.
      responses:
        '200':
          description: The requested interview template.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/InterviewTemplate'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /interview-templates/{key}/interviews/:
    parameters:
      - $ref: '#/components/parameters/Key'
    post:
      operationId: createInterviewFromTemplate
      tags: [Interview Templates]
      summary: Create Interview from Template
      description: Creates a new interview pre-populated from the given interview template.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/InterviewInput'
      responses:
        '201':
          description: The created interview.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Interview'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /children/:
    get:
      operationId: listChildOrganisations
      tags: [Child Organisations]
      summary: List Children
      description: Lists organisations created under the parent organisation.
      responses:
        '200':
          description: A list of child organisations.
          content:
            application/json:
              schema:
                type: object
                properties:
                  results:
                    type: array
                    items:
                      $ref: '#/components/schemas/ChildOrganisation'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createChildOrganisation
      tags: [Child Organisations]
      summary: Create Child Organisation
      description: Creates a new organisation under the parent organisation.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ChildOrganisationInput'
      responses:
        '201':
          description: The created child organisation.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ChildOrganisation'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /languages/:
    get:
      operationId: listLanguages
      tags: [Reference]
      summary: List Languages
      description: Lists the languages supported for interviews and participant communications.
      responses:
        '200':
          description: A list of languages.
          content:
            application/json:
              schema:
                type: object
                properties:
                  results:
                    type: array
                    items:
                      $ref: '#/components/schemas/Language'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /idv-counties/:
    get:
      operationId: listIdvCountries
      tags: [Reference]
      summary: List Countries
      description: Lists the countries of employment supported for identity verification (IDV).
      responses:
        '200':
          description: A list of IDV countries of employment.
          content:
            application/json:
              schema:
                type: object
                properties:
                  results:
                    type: array
                    items:
                      $ref: '#/components/schemas/Country'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  securitySchemes:
    apiKeyAuth:
      type: apiKey
      in: header
      name: Authorization
      description: >-
        The integration key ("API key") available on the Willo Integrations page
        at https://app.willotalent.com/integrations, sent in the Authorization
        header. Each user has their own key carrying that user's permissions.
  parameters:
    Key:
      name: key
      in: path
      required: true
      description: The unique key of the resource.
      schema:
        type: string
  responses:
    BadRequest:
      description: The request was unacceptable, often due to a missing required parameter.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: No valid API key was provided.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    NotFound:
      description: The requested resource does not exist.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  schemas:
    Department:
      type: object
      description: A sub-division of the account, shown as a "Company" in the UI.
      properties:
        key:
          type: string
        name:
          type: string
        is_global:
          type: boolean
          description: When true, all users have access to this department by default.
        branding:
          type: object
          description: Optional branding overrides for this department.
    DepartmentInput:
      type: object
      required: [name]
      properties:
        name:
          type: string
        is_global:
          type: boolean
        branding:
          type: object
    Interview:
      type: object
      description: A named set of pre-defined questions; typically a "job" in an ATS.
      properties:
        key:
          type: string
        title:
          type: string
        department:
          type: string
          description: Key of the department the interview belongs to.
        language:
          type: string
        questions:
          type: array
          items:
            $ref: '#/components/schemas/Question'
        created:
          type: string
          format: date-time
    InterviewInput:
      type: object
      requir

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