AskNicely In-App Surveys API

openapi: 3.2.0
info:
  title: AskNicely In-App Survey In-App Surveys API
  version: v1
  summary: Negotiate a one-time survey slug so an NPS/CSAT/5-Star survey can be rendered inside a website or mobile app.
  description: The AskNicely in-app survey flow is a three-step process for displaying a survey inside your own web or mobile surface rather than by email or SMS.
  contact:
    name: AskNicely Support
    email: support@asknice.ly
    url: https://asknicely.zendesk.com/hc/en-us
  x-source: https://demo.asknice.ly/help/apidocs/inapp
  x-generated-by: API Evangelist enrichment pipeline
servers:
- url: https://{domain}.asknice.ly
  description: Per-tenant AskNicely host.
  variables:
    domain:
      default: demo
      description: Your AskNicely account subdomain.
tags:
- name: In-App Surveys
  description: Server-to-server negotiation of an in-app survey slug.
paths:
  /service/inapp.php:
    post:
      operationId: requestSurveySlug
      tags:
      - In-App Surveys
      summary: Request an in-app survey slug
      description: Exchanges a signed contact identity for a survey slug. Survey slugs identify who is receiving the survey and record their responses. The `email_hash` is an HMAC-SHA256 of the contact's email address keyed with your account secret key (available in-platform); AskNicely publishes PHP, Ruby, Python, Java and C# examples for producing it, plus a hash verification tool on the docs page.
      x-source: https://demo.asknice.ly/help/apidocs/inapp
      parameters:
      - name: id
        in: query
        required: true
        description: A single-use, dash-free, 16-character UUID that prevents duplicate submissions.
        schema:
          type: string
          maxLength: 16
        example: 2ee42628423611ed
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SurveySlugRequest'
            example:
              domain_key: DEMO
              template_name: default
              name: Erwin Schrodinger
              email: schrodinger@example.com
              email_hash: df462ce404bbae11bd4e5860682db02e86ccace29b1a4d631dc7fbe075e321c5
              created: '1418350105'
              force: true
              a_custom_property: Sample String
      responses:
        '200':
          description: A survey slug that can be used to render the survey to the user.
components:
  schemas:
    SurveySlugRequest:
      type: object
      required:
      - domain_key
      - template_name
      - name
      - email
      - email_hash
      - created
      description: Any number of additional custom properties beyond those listed are supported.
      properties:
        domain_key:
          type: string
          description: The domain you signed up to AskNicely with.
        template_name:
          type: string
          description: The name of the survey template to use.
        name:
          type: string
          description: The name of the person being surveyed.
        email:
          type: string
          format: email
          description: The email address of the person being surveyed.
        email_hash:
          type: string
          description: HMAC-SHA256 hex digest of the contact's email address, keyed with your account secret key.
        created:
          type: string
          description: Unix timestamp (seconds since 01/01/1970) of when this customer joined your service.
        force:
          type: boolean
          description: Force the survey and ignore contact rules. Intended for development testing only; it prevents the survey from triggering workflows and must not be used in production.
      additionalProperties: true