Nationstar Mortgage Holdings website screenshot

Nationstar Mortgage Holdings

Nationstar Mortgage Holdings was a non-bank residential mortgage loan originator and servicer in the United States that was rebranded as Mr. Cooper Group.

Nationstar Mortgage Holdings is profiled on the APIs.io network. Tagged areas include Mortgage, Financial-Services, Loan Servicing, and Fortune 1000.

Nationstar Mortgage Holdings’ developer surface includes engineering blog and 5 more developer resources.

🌐 Visit website 📡 Source on GitHub
4.0/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
0 APIs
MortgageFinancial-ServicesLoan ServicingFortune 1000

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 4.0/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 0.5 / 20
Access Clarity 0.0 / 20
Operational Transparency 0.3 / 13
Contract Governance 0.0 / 12
Discoverability 3.2 / 10
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/nationstar-mortgage-holdings: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Nationstar Mortgage Holdings Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Press 5

Recent news and press coverage referencing this provider.

Rocket Companies Announces Delivery of Conditional ...

2026-05-25

Mr. Cooper Launches New Mobile App to Bring the Power of AI ...

2026-05-25

Research Update: Mr. Cooper Group Inc. Ratings Ra

2026-05-25

Mr. Cooper announces new AI-driven mobile app for ...

2026-05-25

Hail to the Chief: Nationstar COO Tony Ebers ...

2026-05-25

Resources

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Other 1

Properties that don't map to a standard resource type

Successor
Successor

Source (apis.yml)

apis.yml Raw ↑ 
aid: nationstar-mortgage-holdings
name: Nationstar Mortgage Holdings
description: Nationstar Mortgage Holdings was a non-bank residential mortgage loan originator and servicer in the United States
  that was rebranded as Mr. Cooper Group.
type: Index
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
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/nationstar-mortgage-holdings.png
tags:
- Mortgage
- Financial-Services
- Loan Servicing
- Fortune 1000
tags_raw:
- Mortgage
- Financial Services
- Loan Servicing
- Fortune 1000
url: https://raw.githubusercontent.com/api-evangelist/nationstar-mortgage-holdings/refs/heads/main/apis.yml
created: '2026-03-24'
modified: '2026-05-02'
specificationVersion: '0.23'
apis: []
common:
- type: DomainSecurity
  url: security/nationstar-mortgage-holdings-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/Nationstar
- type: LinkedIn
  url: https://www.linkedin.com/company/nationstar-mortgage
- url: https://www.mrcooper.com
  type: Website
- url: https://www.mrcooper.com
  type: Successor
- type: Blog
  url: https://www.mrcooper.com/blog/feed/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-parent: mr-cooper-group
x-relationship: rebrand-predecessor

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