Ledgebrook

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.

Ledgebrook is profiled on the APIs.io network. Tagged areas include Company, Insurance, Insurtech, Excess and Surplus, and Specialty Insurance.

Ledgebrook’s developer surface includes support and 14 more developer resources.

🌐 Visit website 📡 Source on GitHub
13.3/100 emerging ▬ flat Agent 4/100 human only Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
0 APIs
CompanyInsuranceInsurtechExcess and SurplusSpecialty InsuranceManaging General AgentReinsuranceCommercial LiabilityCyber InsuranceUnderwriting

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 13.3/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 0.9 / 20
Commercial Clarity 4.2 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 6.9 / 10
Agent readiness — 4/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
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 4 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/ledgebrook: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Security Posture 1

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

Ledgebrook Domain Security

TLSv1.3 · HSTS · DNSSEC

SECURITY

Resources

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

WellKnown
WellKnown
 LLMsTxt
LLMsTxt

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support
Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 5

The organization behind the API

Website
Website
 About
About
 Press
Press
 Careers
Careers
 LinkedIn
LinkedIn

Other 4

Properties that don't map to a standard resource type

Products
Products
 Complaints
Complaints
 Claims
Claims
 SecondaryMarket
SecondaryMarket

Source (apis.yml)

apis.yml Raw ↑ 
aid: ledgebrook
name: Ledgebrook
description: 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.
url: https://raw.githubusercontent.com/api-evangelist/ledgebrook/refs/heads/main/apis.yml
image: https://cdn.prod.website-files.com/63ebe9ba92c291dd8792fe4c/67ea881e9ab2f5f219dbe42a_ledgebrook-og.jpg
x-type: company
x-source: harvest:secondary-market
x-tier: stub
x-tier-reason: harvest
specificationVersion: '0.20'
created: '2026-08-01'
modified: '2026-08-01'
tags:
- Company
- Insurance
- Insurtech
- Excess and Surplus
- Specialty Insurance
- Managing General Agent
- Reinsurance
- Commercial Liability
- Cyber Insurance
- Underwriting
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/ledgebrook-domain-security.yml
- type: WellKnown
  url: well-known/ledgebrook-well-known.yml
- type: LLMsTxt
  url: llms/ledgebrook-llms.txt
- type: Website
  url: https://www.ledgebrook.com/
- type: Products
  url: https://www.ledgebrook.com/products
- type: About
  url: https://www.ledgebrook.com/about
- type: Press
  url: https://www.ledgebrook.com/press
- type: Support
  url: https://www.ledgebrook.com/contact
- type: Careers
  url: https://www.ledgebrook.com/careers
- type: TermsOfService
  url: https://www.ledgebrook.com/terms-of-use
- type: PrivacyPolicy
  url: https://www.ledgebrook.com/privacy
- type: Complaints
  url: https://www.ledgebrook.com/complaints
- type: Claims
  url: https://www.ledgebrook.com/claims
- type: LinkedIn
  url: https://www.linkedin.com/company/ledgebrook-insurance
- type: SecondaryMarket
  url: https://forgeglobal.com/ledgebrook_stock/
x-enrichment:
  date: '2026-08-01'
  status: minimal
  artifacts_added: 3
  pass: local-v1