openapi: 3.1.0
info:
  title: HeyMilo Public ATS Email Template Groups API
  description: External developer-facing API for HeyMilo. Create interviewers with agentic workflows, ingest candidates, retrieve interview results, and manage workspace resources.
  version: 2.0.0
servers:
- url: https://api.heymilo.ai
  description: Production
security:
- ApiKeyAuth: []
tags:
- name: Email Template Groups
  description: View grouped email template configurations.
paths:
  /api/v2/email-template-groups:
    get:
      tags:
      - Email Template Groups
      summary: List email template groups
      description: Returns all email template groups for the workspace.
      operationId: listEmailTemplateGroups
      parameters:
      - name: limit
        in: query
        required: false
        schema:
          type: integer
          maximum: 100
          minimum: 1
          default: 20
          title: Limit
      - name: starting_after
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Starting After
      - name: search
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          description: Case-insensitive substring filter applied to the group name.
          title: Search
        description: Case-insensitive substring filter applied to the group name.
      - name: X-API-KEY
        in: header
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: X-Api-Key
      - name: Authorization
        in: header
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Authorization
      - name: X-Workspace-Id
        in: header
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: X-Workspace-Id
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ListResponse_EmailTemplateGroupResponse_'
        '401':
          description: Invalid or missing API key.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/APIErrorResponse'
        '429':
          description: Rate limit exceeded.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/APIErrorResponse'
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
  /api/v2/email-template-groups/{group_id}:
    get:
      tags:
      - Email Template Groups
      summary: Get an email template group
      description: Returns a single email template group by ID.
      operationId: getEmailTemplateGroup
      parameters:
      - name: group_id
        in: path
        required: true
        schema:
          type: string
          title: Group Id
      - name: X-API-KEY
        in: header
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: X-Api-Key
      - name: Authorization
        in: header
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Authorization
      - name: X-Workspace-Id
        in: header
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: X-Workspace-Id
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SingleResponse_EmailTemplateGroupResponse_'
        '401':
          description: Invalid or missing API key.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/APIErrorResponse'
        '429':
          description: Rate limit exceeded.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/APIErrorResponse'
        '404':
          description: Email template group not found.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/APIErrorResponse'
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
components:
  schemas:
    APIErrorDetail:
      properties:
        code:
          type: string
          title: Code
          description: Machine-readable error code
          examples:
          - invalid_param
        message:
          type: string
          title: Message
          description: Human-readable explanation
          examples:
          - title must be between 3 and 200 characters
        param:
          anyOf:
          - type: string
          - type: 'null'
          title: Param
          description: Parameter that caused the error
          examples:
          - title
      type: object
      required:
      - code
      - message
      title: APIErrorDetail
    ListResponse_EmailTemplateGroupResponse_:
      properties:
        data:
          items:
            $ref: '#/components/schemas/EmailTemplateGroupResponse'
          type: array
          title: Data
        pagination:
          $ref: '#/components/schemas/PaginationMeta'
      type: object
      required:
      - data
      - pagination
      title: ListResponse[EmailTemplateGroupResponse]
    APIError:
      properties:
        type:
          type: string
          title: Type
          description: Error category
          examples:
          - invalid_request_error
        code:
          type: string
          title: Code
          description: Machine-readable error code
          examples:
          - validation_error
        message:
          type: string
          title: Message
          description: Human-readable summary
          examples:
          - The request body failed validation
        param:
          anyOf:
          - type: string
          - type: 'null'
          title: Param
          description: Top-level parameter that caused the error
        doc_url:
          anyOf:
          - type: string
          - type: 'null'
          title: Doc Url
          description: Link to relevant documentation
        errors:
          items:
            $ref: '#/components/schemas/APIErrorDetail'
          type: array
          title: Errors
          description: Detailed per-field validation errors
      type: object
      required:
      - type
      - code
      - message
      title: APIError
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
            - type: string
            - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
      type: object
      required:
      - loc
      - msg
      - type
      title: ValidationError
    SingleResponse_EmailTemplateGroupResponse_:
      properties:
        data:
          $ref: '#/components/schemas/EmailTemplateGroupResponse'
        meta:
          anyOf:
          - additionalProperties: true
            type: object
          - type: 'null'
          title: Meta
          description: Optional metadata. Shape varies by endpoint.
      type: object
      required:
      - data
      title: SingleResponse[EmailTemplateGroupResponse]
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    EmailTemplateGroupResponse:
      properties:
        object:
          type: string
          const: email_template_group
          title: Object
          description: Object type identifier.
          default: email_template_group
        id:
          type: string
          title: Id
          description: Unique template group identifier.
          examples:
          - E629E33BC4AD
        name:
          type: string
          title: Name
          description: Human-readable group name.
          examples:
          - Engineering Hiring Emails
        template_mappings:
          additionalProperties:
            type: string
          type: object
          title: Template Mappings
          description: Mapping of template_key to template_id. Keys are email types, values are V4EmailTemplate IDs.
          examples:
          - WEB_INTERVIEW_INVITATION: B31EB9E73BEE
            WEB_INTERVIEW_NUDGE: 637CE3438ACA
        sender_email_id:
          anyOf:
          - type: string
          - type: 'null'
          title: Sender Email Id
          description: ID of the sender email address associated with this group.
          examples:
          - 1BF9F7881AC8
        created_at:
          type: number
          title: Created At
          description: Unix timestamp when the group was created.
          examples:
          - 1739612400.0
        updated_at:
          type: number
          title: Updated At
          description: Unix timestamp when the group was last updated.
          examples:
          - 1739617200.0
      type: object
      required:
      - id
      - name
      - template_mappings
      - created_at
      - updated_at
      title: EmailTemplateGroupResponse
      description: 'A group of email templates assigned to a posting.


        Template groups map template keys (e.g. ''WEB_INTERVIEW_INVITATION'')

        to specific template IDs, allowing different postings to use

        different email styles.'
    APIErrorResponse:
      properties:
        error:
          $ref: '#/components/schemas/APIError'
      type: object
      required:
      - error
      title: APIErrorResponse
    PaginationMeta:
      properties:
        has_more:
          type: boolean
          title: Has More
          description: Whether more results exist beyond this page
        total_count:
          anyOf:
          - type: integer
          - type: 'null'
          title: Total Count
          description: Total number of results (if available)
        url:
          anyOf:
          - type: string
          - type: 'null'
          title: Url
          description: URL of this resource
      type: object
      required:
      - has_more
      title: PaginationMeta
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-API-KEY
      description: API key for authentication. Pass your key in the X-API-KEY header.