openapi: 3.0.3
info:
  title: Encompass Developer Connect Authentication Milestones API
  description: 'Encompass Developer Connect is the ICE Mortgage Technology (formerly Ellie Mae) REST API platform for the Encompass loan origination system (LOS). It lets partners and lenders configure, customize, and administer loan information and resources programmatically - loan manufacturing, loan pipeline, borrower pairs, contacts, eFolder documents and attachments, milestones, conditions, users, and event webhooks.


    Access is partner/tenant-gated: every call is authenticated with an OAuth 2.0 bearer token issued for a specific Encompass instance. Credentials (Client ID and secret / API key) are provisioned in the developer portal and distributed by an Encompass user with the super administrator persona. The data and features a token can reach are governed by the caller''s assigned Encompass persona.


    Versioning is path-based; v3 is current and v1/v2 are deprecated. This document grounds endpoints in the public API reference at developer.icemortgagetechnology.com. Endpoints tagged x-endpoint-status "confirmed" are read directly from the public reference; those tagged "modeled" follow Encompass''s documented, consistent path conventions but were authored behind the login-gated request builder and should be verified against the live reference before use.'
  version: '2026-07-04'
  contact:
    name: ICE Mortgage Technology - Encompass Developer Connect
    url: https://developer.icemortgagetechnology.com/developer-connect/docs/welcome
  x-lineage: Encompass is a product of ICE Mortgage Technology, formerly Ellie Mae, acquired by Intercontinental Exchange (ICE) in 2020. The API host api.elliemae.com reflects the Ellie Mae lineage.
servers:
- url: https://api.elliemae.com
  description: Encompass Developer Connect production API host (Ellie Mae lineage)
security:
- oAuth2: []
- bearerAuth: []
tags:
- name: Milestones
  description: Loan workflow milestones and associates (modeled).
paths:
  /encompass/v3/loans/{loanId}/milestones:
    get:
      operationId: listMilestones
      tags:
      - Milestones
      summary: List loan milestones
      description: List the milestones marking a loan's progress through origination.
      x-endpoint-status: modeled
      parameters:
      - $ref: '#/components/parameters/LoanId'
      responses:
        '200':
          description: A list of milestones.
        '401':
          $ref: '#/components/responses/Unauthorized'
  /encompass/v3/loans/{loanId}/milestones/{milestoneId}:
    patch:
      operationId: updateMilestone
      tags:
      - Milestones
      summary: Update / complete a milestone
      description: Finish or update a milestone and its assigned associate.
      x-endpoint-status: modeled
      parameters:
      - $ref: '#/components/parameters/LoanId'
      - $ref: '#/components/parameters/MilestoneId'
      responses:
        '200':
          description: The updated milestone.
        '401':
          $ref: '#/components/responses/Unauthorized'
  /encompass/v3/loans/{loanId}/associates:
    get:
      operationId: listLoanAssociates
      tags:
      - Milestones
      summary: List loan associates
      description: List the associates (loan team members) assigned to a loan's milestones.
      x-endpoint-status: modeled
      parameters:
      - $ref: '#/components/parameters/LoanId'
      responses:
        '200':
          description: A list of associates.
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  parameters:
    MilestoneId:
      name: milestoneId
      in: path
      required: true
      description: The milestone identifier.
      schema:
        type: string
    LoanId:
      name: loanId
      in: path
      required: true
      description: The loan GUID.
      schema:
        type: string
  responses:
    Unauthorized:
      description: Missing or invalid OAuth 2.0 bearer token.
  securitySchemes:
    oAuth2:
      type: oauth2
      description: OAuth 2.0 client credentials / authorization code issued per Encompass instance.
      flows:
        clientCredentials:
          tokenUrl: https://api.elliemae.com/oauth2/v1/token
          scopes: {}
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT