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.
Mr. Cooper Group is profiled on the APIs.io network. Tagged areas include Mortgage, Mortgage Servicing, Financial Services, Real Estate, and Consumer Finance.
Mr. Cooper Group’s developer surface includes engineering blog, authentication, and 5 more developer resources.
Servicing of residential mortgage loans for approximately 4.3 million customers across the United States, covering payment processing, escrow, customer service, and loss mitigat...
Mortgage Origination
Origination of home purchase, refinance, cash-out refinance, and home equity loans, now powered by Rocket Mortgage following the acquisition.
Home Equity Loans
Second-lien home equity products allowing customers to access equity 'without losing the rate on your first mortgage'.
Online Self-Service
Mr. Cooper consumer portal at mrcooper.com providing account access, payment, statements, escrow management, and loan lookup.
Mobile App
Mr. Cooper mobile app for iOS and Android offering account management, payments, and document access.
Pre-built integrations with other platforms and tools.
Rocket Mortgage
Mr. Cooper consumer mortgage originations are now branded 'Homeownership Powered by Rocket Mortgage' following the acquisition; mrcooper.com explicitly notes the two are 'separa...
Fannie Mae
GSE counterparty for conforming loan servicing, securitization, and subservicing.
Freddie Mac
GSE counterparty for conforming loan servicing and subservicing.
Ginnie Mae
Issuer relationship for FHA, VA, and USDA-backed mortgage-backed securities.
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
accessModel:
pricing: unknown
onboarding: unknown
trial: false
try_now: false
public: false
label: Unknown
confidence: low
source: []
generated: '2026-07-22'
method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/mr-cooper-group.png
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