# Capstack

**Canonical:** https://apis.io/providers/capstack/  
**Website:** https://capstack.ai  
**APIs profiled:** 0

Capstack Technologies operates a digital bank-to-bank marketplace that lets banks, credit unions, and other financial institutions trade whole loans and loan participations, access liquidity, and manage portfolio concentration risk. Founded in 2023 and headquartered in Miami, FL, the SaaS platform integrates with originating banks' core banking systems and loan-origination systems (LOS) to surface loans available for syndication, then lets participating institutions search by criteria, ask questions live, and submit bids. It adds loan servicing (payment processing, remittance reporting, loan status tracking) and real-time portfolio analytics, specializing in commercial real estate, multifamily residential, and farmland loans. The marketplace has featured over $2B in assets across 200+ registered banks and credit unions. Capstack is backed by Cowboy Ventures and Citi Ventures. This is a private enterprise platform accessed via a demo/onboarding flow; no public developer API, SDKs, or documentation are published at this time.

## Kin Score — 9.0 / 100 (minimal)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 9.0).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 2.4 |
| Commercial Clarity | 27.6 |
| Access Clarity | 27.6 |

Regulatory layer — **Banking & Open Finance**: 17.7 (matched via tags).

## Agent readiness — 0.0 (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 | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

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

## Security (1)

- **Capstack Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Company, Fintech, Banking, Loan Marketplace, Loan Trading, Loan Servicing, Portfolio Analytics, Credit Unions, Capital Markets

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