aid: mr-cooper-group
url: https://raw.githubusercontent.com/api-evangelist/mr-cooper-group/refs/heads/main/apis.yml
name: Mr. Cooper Group
type: Index
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
  - Mortgage
  - Mortgage Servicing
  - Financial Services
  - Real Estate
  - Consumer Finance
  - Acquired
  - Rocket Companies
description: 'Mr. Cooper Group (formerly Nationstar Mortgage, NASDAQ: COOP) was a Coppell, Texas-based mortgage servicer with roughly $1.5T in unpaid principal balance under servicing and more than 4 million customers. It was acquired by Rocket Companies (NYSE: RKT) in an all-stock transaction announced March 31, 2025 (initial value $9.4B) and closed October 1, 2025 (final value approximately $14.2B). Mr. Cooper now operates as a Rocket Companies subsidiary; the corporate site mrcoopergroup.com redirects to rocketcompanies.com and the COOP ticker has been delisted. The consumer brand Mr. Cooper continues at mrcooper.com as one of seven Rocket Companies operating businesses (Rocket Mortgage, Redfin, Mr. Cooper, Rocket Homes, Rocket Close, Rocket Money, Rocket Loans). Mr. Cooper does not publish a public developer API or developer portal.'
created: '2026-05-23'
modified: '2026-05-23'
specificationVersion: '0.19'
apis: []
common:
  - type: DomainSecurity
    url: security/mr-cooper-group-domain-security.yml
  - url: https://www.mrcooper.com/blog/feed/
    type: Blog
  - type: Website
    url: https://www.mrcooper.com/
  - type: ParentCompanyWebsite
    url: https://www.rocketcompanies.com/
  - type: InvestorRelations
    url: https://ir.rocketcompanies.com/home/default.aspx
  - type: LinkedIn
    url: https://www.linkedin.com/company/mrcooper/
  - type: Login
    url: https://www.mrcooper.com/login
  - type: Features
    data:
      - name: Mortgage Servicing
        description: Servicing of residential mortgage loans for approximately 4.3 million customers across the United States, covering payment processing, escrow, customer service, and loss mitigation.
      - name: Mortgage Origination
        description: Origination of home purchase, refinance, cash-out refinance, and home equity loans, now powered by Rocket Mortgage following the acquisition.
      - name: Home Equity Loans
        description: Second-lien home equity products allowing customers to access equity 'without losing the rate on your first mortgage'.
      - name: Online Self-Service
        description: Mr. Cooper consumer portal at mrcooper.com providing account access, payment, statements, escrow management, and loan lookup.
      - name: Mobile App
        description: Mr. Cooper mobile app for iOS and Android offering account management, payments, and document access.
  - type: UseCases
    data:
      - name: Residential Mortgage Servicing
        description: Servicing third-party-originated and GSE-owned residential mortgages at scale, including conforming, FHA, VA, and USDA loans.
      - name: Mortgage Subservicing
        description: Subservicing arrangements for banks, credit unions, and mortgage investors that own loans but outsource servicing operations.
      - name: Specialty Servicing
        description: Servicing of delinquent, non-performing, and re-performing loans through the Rushmore Servicing subsidiary.
      - name: Real Estate Services
        description: REO management, valuation, title, and field services historically delivered through the Xome subsidiary.
  - type: Authentication
    data:
      - name: No Public API
        description: Mr. Cooper does not publish a public developer API, developer portal, OpenAPI specification, or SDK. Consumer-facing mobile and web experiences are powered by private internal APIs not exposed to third parties.
  - type: Compliance
    data:
      - name: CFPB Regulation
        description: Subject to U.S. Consumer Financial Protection Bureau supervision and enforcement as a large mortgage servicer.
      - name: RESPA
        description: Real Estate Settlement Procedures Act compliance governing mortgage servicing disclosures, escrow accounts, and loss mitigation.
      - name: TILA
        description: Truth in Lending Act compliance for periodic statements, ARM disclosures, and payoff statements.
      - name: GLBA
        description: Gramm-Leach-Bliley Act compliance for safeguarding customer financial information.
      - name: State Servicing Licenses
        description: Licensed mortgage servicer across U.S. states with applicable state regulatory oversight.
  - type: Acquisition
    data:
      - name: Acquired By Rocket Companies
        description: "Acquisition by Rocket Companies (NYSE: RKT) announced March 31, 2025 in an all-stock transaction initially valued at $9.4 billion, with a fixed exchange ratio of 11.0 Rocket Class A shares per Mr. Cooper share."
      - name: Deal Closing
        description: Transaction closed October 1, 2025 at a final value of approximately $14.2 billion driven by RKT share-price appreciation between announcement and close. Mr. Cooper became a wholly-owned Rocket Companies subsidiary on the closing date.
      - name: NASDAQ Delisting
        description: COOP common stock ceased trading on Nasdaq on closing. The mrcoopergroup.com corporate domain now redirects to rocketcompanies.com and Mr. Cooper investor relations consolidated under ir.rocketcompanies.com.
      - name: Combined Servicing Scale
        description: The combined Rocket Companies + Mr. Cooper platform is the largest U.S. mortgage servicer, with the Rocket investor narrative referencing approximately $2.1T in combined servicing UPB across more than 10 million clients post-close.
  - type: Subsidiaries
    data:
      - name: Nationstar Mortgage LLC
        description: Operating mortgage servicing and origination subsidiary doing business as Mr. Cooper. The legal entity name predates the 2017 consumer rebrand to Mr. Cooper.
      - name: Xome
        description: Real estate technology subsidiary providing REO disposition, valuations, title, and field services. Mr. Cooper announced sale of the Xome auction business to Voxtur in 2024.
      - name: Rushmore Servicing
        description: Specialty servicing subsidiary focused on non-performing and re-performing residential mortgages.
  - type: Integrations
    data:
      - name: Rocket Mortgage
        description: Mr. Cooper consumer mortgage originations are now branded 'Homeownership Powered by Rocket Mortgage' following the acquisition; mrcooper.com explicitly notes the two are 'separate companies uniting under the same parent organization'.
      - name: Fannie Mae
        description: GSE counterparty for conforming loan servicing, securitization, and subservicing.
      - name: Freddie Mac
        description: GSE counterparty for conforming loan servicing and subservicing.
      - name: Ginnie Mae
        description: Issuer relationship for FHA, VA, and USDA-backed mortgage-backed securities.
  - type: History
    data:
      - name: Founding
        description: Traces origins to 1997 with the founding of Nationstar Mortgage; corporate predecessor entities trace to WMI Holdings (the post-bankruptcy successor to Washington Mutual). Current Mr. Cooper Group corporate structure formed in 2018.
      - name: Brand Change
        description: Rebranded consumer-facing operations from Nationstar Mortgage to Mr. Cooper in August 2017; the parent renamed from Nationstar Mortgage Holdings to Mr. Cooper Group Inc. in 2018.
      - name: 2023 Cyberattack
        description: Suffered a cyberattack on October 31, 2023 that compromised personal information of millions of current and former customers and temporarily took servicing systems offline.
      - name: Headquarters
        description: Coppell, Texas (Dallas-Fort Worth area).
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com