# Ledgebrook

**Canonical:** https://apis.io/providers/ledgebrook/  
**Website:** https://www.ledgebrook.com/  
**APIs profiled:** 0

Ledgebrook is a technology-enabled excess and surplus (E&S) lines managing general agent (MGA) and reinsurance platform headquartered in Massachusetts and founded by Gage Caligaris. It underwrites specialty commercial casualty risk — general liability, professional liability, and cyber — exclusively through wholesale brokers, competing on quote speed rather than direct-to-consumer distribution. Its stack pairs a proprietary underwriting workbench with machine-learning models applied across submission intake, triage, data architecture, and pricing, backed by an engineering, data-science and product organization of 70+ people, with policy administration running on Socotra. Ledgebrook Re extends the business into delegated-authority reinsurance with London and Dubai operations. The company closed an oversubscribed Series C funding round in June 2025 and has appeared on the CB Insights 50 Most Innovative Insurtech Startups list. As of this profiling pass Ledgebrook publishes no public developer portal, API documentation, or machine-readable API contract — its broker quoting platform is a private, credentialed surface.

## Kin Score — 9.3 / 100 (minimal)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (-0.7 from 10.0).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 4.8 |
| Commercial Clarity | 21.1 |
| Access Clarity | 21.1 |

Regulatory layer — **Insurance**: 21.2 (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 |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Security (1)

- **Ledgebrook Domain Security** — TLSv1.3 · HSTS · DNSSEC

## Tags

Company, Insurance, Insurtech, Excess and Surplus, Specialty Insurance, Managing General Agent, Reinsurance, Commercial Liability, Cyber Insurance, Underwriting

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