# Black Knight (Acquired by ICE — Now ICE Mortgage Technology)

**Canonical:** https://apis.io/providers/black-knight/  
**Website:** https://mortgagetech.ice.com  
**APIs profiled:** 9

Black Knight, Inc. was a Jacksonville-based mortgage technology and data provider whose core franchises were MSP (the dominant US loan-servicing platform), LoanSphere (default, document, and decisioning suites), Empower LOS (mid-market loan origination), and the Optimal Blue secondary marketing / product-and-pricing engine. Intercontinental Exchange (NYSE: ICE) acquired Black Knight in September 2023 for approximately $11.7B (down from the originally-announced $13.1B in May 2022) after divesting Optimal Blue to Constellation Software's Perseus Operating Group as a condition of FTC clearance. Black Knight's product lines now sit inside ICE Mortgage Technology alongside Encompass (the ex-Ellie Mae LOS). The blackknightinc.com domain redirects to mortgagetech.ice.com, and developer surfaces have migrated to developer.ice.com (MSP DX APIs, Servicing Vault, Loss Mitigation, Payoffs, Promise To Pay) and developer.icemortgagetechnology.com (Encompass Developer Connect). Optimal Blue's APIs are now hosted at digitalmarketplace.optimalblue.com under independent Constellation Software ownership. This profile documents the API surfaces as they existed under Black Knight and tracks the post-acquisition fate of each product line.

## Kin Score — 26.5 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 26.5).

| Facet | Score |
|---|---|
| Discoverability | 59.3 |
| Contract Quality | 29.6 |
| Governance | 25.0 |
| Contract Governance | 25.0 |
| Operational Transparency | 2.6 |
| Developer Ergonomics | 9.5 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

## Agent readiness — 3.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium — onboarding: unknown, pricing: freemium, trial: no (confidence: medium).

## APIs (9)

- **MSP DX (Direct Exchange) APIs** — MSP (Mortgage Servicing Platform) was Black Knight's flagship product — the mainframe-rooted system of record that services the majority of US first-mortgage loans. MSP DX (Dire...
- **Servicing Digital / Promise To Pay APIs** — Borrower-facing servicing capabilities including the Promise To Pay API, which enables clients to document borrower payment promises along with reason codes, supporting collecti...
- **LoanSphere Default, Document & Decisioning Suite** — LoanSphere was Black Knight's umbrella brand for default management (foreclosure, bankruptcy, loss-mitigation case management), document services (eClosing, eVault, eRecording v...
- **Empower LOS APIs** — Empower was Black Knight's mid-to-enterprise loan origination system. After the ICE acquisition, Empower coexists with ICE's larger Encompass LOS (from the 2020 Ellie Mae acquis...
- **Encompass Developer Connect (sibling product under ICE)** — Although Encompass came to ICE via the 2020 Ellie Mae acquisition (not Black Knight), it is now the canonical LOS API surface under ICE Mortgage Technology and effectively super...
- **Optimal Blue Product & Pricing APIs (divested to Constellation)** — Optimal Blue's Product & Pricing Engine (PPE) generates eligible products and pricing for any user in any format and automates loan creation, locking, post-lock management, and ...
- **Optimal Blue Loan Trading APIs (Resitrader)** — Workflow and data APIs for the Resitrader loan-trading application — execute trades, manage data modules, centralize trading operations. Now operated by Optimal Blue under Const...
- **Optimal Blue Business Intelligence APIs** — Data tools including 16 Mortgage Market Rate Indices, integrable into dashboards. Successor to Black Knight's Originations Market Monitor and Mortgage Monitor data products at t...
- **Optimal Blue Broker Pricing APIs (Loansifter)** — Loansifter is the turnkey PPE for mortgage brokers — generate and display eligible products and pricing across borrower scenarios. Originally a Black Knight (via Optimal Blue) p...

## Security (1)

- **Black Knight Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Plans (1)

- **Black Knight Plans Pricing**

## Use cases (5)

- **Investor Loan Reporting** — Servicers report loan-level activity to GSE and private investors via MSP DX investor-reporting APIs.
- **Default Workflow Automation** — Default servicers automate foreclosure, bankruptcy, and loss-mitigation case management via Loss Mitigation and Collections APIs.
- **Secondary Marketing Rate Lock** — Originators lock rates and price loans through Optimal Blue PPE APIs.
- **Whole Loan Trading** — Aggregators trade whole loans through Resitrader APIs.
- **Borrower Promise To Pay** — Servicers document borrower payment commitments through the Promise To Pay API for collection workflows.

## Tags

Mortgage Technology, Loan Servicing, Loan Origination, Secondary Marketing, Default Management, Investor Reporting, Product Pricing Engine, Real Estate Data, Fintech, Acquired Company, ICE Mortgage Technology

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