# Mr. Cooper Group

**Canonical:** https://apis.io/providers/mr-cooper-group/  
**Website:** https://www.mrcooper.com/  
**APIs profiled:** 0

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.

## Kin Score — 10.8 / 100 (minimal)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 10.8).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 14.3 |
| Commercial Clarity | 14.5 |
| Access Clarity | 14.5 |

## Agent readiness — 2.5 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## Security (1)

- **Mr Cooper Group Domain Security** — TLSv1.3 · DNSSEC · DMARC

## Use cases (4)

- **Residential Mortgage Servicing** — Servicing third-party-originated and GSE-owned residential mortgages at scale, including conforming, FHA, VA, and USDA loans.
- **Mortgage Subservicing** — Subservicing arrangements for banks, credit unions, and mortgage investors that own loans but outsource servicing operations.
- **Specialty Servicing** — Servicing of delinquent, non-performing, and re-performing loans through the Rushmore Servicing subsidiary.
- **Real Estate Services** — REO management, valuation, title, and field services historically delivered through the Xome subsidiary.

## Tags

Mortgage, Mortgage Servicing, Financial-Services, Real-Estate, Consumer Finance, Acquired, Rocket Companies

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/mr-cooper-group/). Scores are computed from the provider's own public artifacts under a published rubric.