Ledger Investing

Ledger Investing is a New York-based specialist broking and advisory firm for casualty insurance-linked securities (ILS), connecting insurers, reinsurers and fronting carriers to institutional capital markets investors. The firm originates casualty risk, structures off-balance-sheet solutions, brokes and distributes the resulting securities, and supports secondary trading, having securitized more than $2.5 billion of casualty premium across 170+ transactions since graduating Y Combinator in 2017. Its wholly owned SaaS subsidiary Korra Tech, LLC operates the Korra open data and analytics platform for the reinsurance and ILS market, whose Ledger Analytics API gives actuaries programmatic remote-compute access to Bayesian loss development, tail and forecasting models over insurance loss triangles, alongside the open-source Bermuda (loss triangle manipulation) and BayesBlend (Bayesian model stacking) Python libraries. Other subsidiaries include Ledger Capital Markets, LLC (SEC-registered broker-dealer, FINRA/SIPC member) and Ledger Risk Markets, LLC (licensed reinsurance intermediary).

Ledger Investing publishes 6 APIs on the APIs.io network, including Cashflow Models API, Development Models API, Forecast Models API, and 3 more. Tagged areas include Company, Insurance Tech, Insurance, Reinsurance, and Insurance-Linked Securities.

Ledger Investing’s developer surface includes documentation, API reference, getting-started guide, pricing, signup flow, support, engineering blog, and 31 more developer resources.

🌐 Visit website 📡 Source on GitHub

53.6/100 developing ▬ flat Agent 21/100 agent aware Front door AI 3/6 light open core · MIT Full breakdown ↓
scored 2026-09-19 · rubric v0.22.0

1 APIs

Company Insurance Tech Insurance ReinsuranceInsurance-Linked SecuritiesActuarial Analytics Capital Markets Data Science Financial-Services

Kin Score

Kin Score How this is scored →
scored 2026-09-19 · rubric v0.22.0

Composite quality — 53.6/100 · developing

Contract Quality 8.9 / 16

Developer Ergonomics 8.6 / 13

Access Clarity 7.9 / 13

Operational Transparency 2.4 / 8

Contract Governance 1.4 / 8

Discoverability 4.5 / 7

Regulatory Posture 8.2 / 15

Open Source Surface 2.5 / 10

Create-or-Update Ergonomics 1.1 / 10

Agent readiness — 21/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Insurance regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Open Source Surface applies to this provider. This product is open source and we read its repository directly, so Open Source Surface carries 10 points of the composite. It is scored from what the repository actually publishes — a security policy, a contribution guide, a release history, a code of conduct — read live from the provider rather than inferred from our own catalog pointers. This facet adds; nothing was taken away to make room for it. An open-source project is not excused from the commercial facets, because exemption would strip it of the points it does earn. If we have the wrong repository, or this product is not open source, say so on your provider repo and we will drop the facet rather than have you publish against it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 65 points between them, because both conditional facets apply and carry 35 points together. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 65% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/ledger-investing: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 6

Individual APIs this provider publishes, each with its own machine-readable definition.

Ledger Investing Cashflow Models API

Cashflow models composed from a fitted development model and tail model.

Ledger Investing Development Models API

Bayesian loss development models (ChainLadder, TraditionalChainLadder, ManualATA, MeyersCRC, GMCL).

Ledger Investing Forecast Models API

Forecasting models (AR1, SSM, TraditionalGCC).

Ledger Investing Tail Models API

Tail development models (GeneralizedBondy, Sherman, ClassicalPowerTransformTail).

Ledger Investing Tasks API

Poll the status of asynchronous fit and predict tasks.

Ledger Investing Triangles API

Upload, list, retrieve and delete insurance loss triangles.

Open Collections 7

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Ledger Analytics Cashflow Models API

OPEN COLLECTION

Ledger Analytics Cashflow Models Development Models API

OPEN COLLECTION

Ledger Analytics Cashflow Models Forecast Models API

OPEN COLLECTION

Ledger Analytics Cashflow Models Tail Models API

OPEN COLLECTION

Ledger Analytics Cashflow Models Tasks API

OPEN COLLECTION

Ledger Analytics Cashflow Models Triangles API

OPEN COLLECTION

Scroll for all 7

Security Posture 4

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

Ledger Investing Authentication

apiKey · 1 scheme

SECURITY

Ledger Investing Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Ledger Investing Vulnerability Disclosure

security.txt

SECURITY

Ledger Investing Trust Center

SOC 2 Type 1, SOC 2 Type 2

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Ledger Investing Agentic Access

32 operations · 17 acting · 3 human-in-the-loop

32 operations · 17 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

WellKnown

WellKnown

X-MCPServerCandidate

X-MCPServerCandidate

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

SourceCode

Packages

SDKs

Access & Security 6

Authentication, authorization, and security posture

Compliance

Security

Authentication

DomainSecurity

VulnerabilityDisclosure

VulnerabilityDisclosure

TrustCenter

TrustCenter

Operate 4

Status, limits, changes, and where to get help

IssueTracker

Releases

Support

ChangeLog

Commercial 4

Pricing, plans, and the legal terms of use

License

Pricing

TermsOfService

PrivacyPolicy

Company 4

The organization behind the API

Website

Website

Blog

Blog

LinkedIn

Twitter

Twitter

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Source (apis.yml)

aid: ledger-investing
name: Ledger Investing
description: Ledger Investing is a New York-based specialist broking and advisory firm for casualty insurance-linked securities
  (ILS), connecting insurers, reinsurers and fronting carriers to institutional capital markets investors. The firm originates
  casualty risk, structures off-balance-sheet solutions, brokes and distributes the resulting securities, and supports secondary
  trading, having securitized more than $2.5 billion of casualty premium across 170+ transactions since graduating Y Combinator
  in 2017. Its wholly owned SaaS subsidiary Korra Tech, LLC operates the Korra open data and analytics platform for the reinsurance
  and ILS market, whose Ledger Analytics API gives actuaries programmatic remote-compute access to Bayesian loss development,
  tail and forecasting models over insurance loss triangles, alongside the open-source Bermuda (loss triangle manipulation)
  and BayesBlend (Bayesian model stacking) Python libraries. Other subsidiaries include Ledger Capital Markets, LLC (SEC-registered
  broker-dealer, FINRA/SIPC member) and Ledger Risk Markets, LLC (licensed reinsurance intermediary).
url: https://raw.githubusercontent.com/api-evangelist/ledger-investing/refs/heads/main/apis.yml
deliveryModel:
  model: open-core
  license: MIT
  open_source: true
  commercial: true
  callable_host: true
  label: Open core · an OSS project plus a commercial hosted product
  confidence: high
  source:
  - license
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://www.ledgerinvesting.com/apple-touch-icon.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- accel
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Insurance Tech
- Insurance
- Reinsurance
- Insurance-Linked Securities
- Actuarial
- Analytics
- Capital Markets
- Data Science
- Financial-Services
tags_raw:
- Company
- Insurance Tech
- Insurance
- Reinsurance
- Insurance-Linked Securities
- Actuarial
- Analytics
- Capital Markets
- Data Science
- Financial Services
apis:
- aid: ledger-investing:ledger-investing-cashflow-models-api
  name: Ledger Investing Cashflow Models API
  description: Cashflow models composed from a fitted development model and tail model.
  humanURL: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/index.html
  baseURL: https://api.korra.com/analytics/
  tags:
  - Cashflow Models
  properties:
  - type: OpenAPI
    url: openapi/ledger-investing-cashflow-models-api-openapi.yml
  - type: Documentation
    url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/index.html
  - type: APIReference
    url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/api/index.html
  - type: GettingStarted
    url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/quickstart.html
  - type: DataModel
    url: data-model/ledger-investing-data-model.yml
- aid: ledger-investing:ledger-investing-development-models-api
  name: Ledger Investing Development Models API
  description: Bayesian loss development models (ChainLadder, TraditionalChainLadder, ManualATA, MeyersCRC, GMCL).
  humanURL: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/index.html
  baseURL: https://api.korra.com/analytics/
  tags:
  - Development Models
  properties:
  - type: OpenAPI
    url: openapi/ledger-investing-development-models-api-openapi.yml
  - type: Documentation
    url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/index.html
  - type: APIReference
    url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/api/index.html
  - type: GettingStarted
    url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/quickstart.html
  - type: DataModel
    url: data-model/ledger-investing-data-model.yml
- aid: ledger-investing:ledger-investing-forecast-models-api
  name: Ledger Investing Forecast Models API
  description: Forecasting models (AR1, SSM, TraditionalGCC).
  humanURL: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/index.html
  baseURL: https://api.korra.com/analytics/
  tags:
  - Forecast Models
  properties:
  - type: OpenAPI
    url: openapi/ledger-investing-forecast-models-api-openapi.yml
  - type: Documentation
    url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/index.html
  - type: APIReference
    url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/api/index.html
  - type: GettingStarted
    url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/quickstart.html
  - type: DataModel
    url: data-model/ledger-investing-data-model.yml
- aid: ledger-investing:ledger-investing-tail-models-api
  name: Ledger Investing Tail Models API
  description: Tail development models (GeneralizedBondy, Sherman, ClassicalPowerTransformTail).
  humanURL: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/index.html
  baseURL: https://api.korra.com/analytics/
  tags:
  - Tail Models
  properties:
  - type: OpenAPI
    url: openapi/ledger-investing-tail-models-api-openapi.yml
  - type: Documentation
    url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/index.html
  - type: APIReference
    url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/api/index.html
  - type: GettingStarted
    url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/quickstart.html
  - type: DataModel
    url: data-model/ledger-investing-data-model.yml
- aid: ledger-investing:ledger-investing-tasks-api
  name: Ledger Investing Tasks API
  description: Poll the status of asynchronous fit and predict tasks.
  humanURL: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/index.html
  baseURL: https://api.korra.com/analytics/
  tags:
  - Task
  tags_raw:
  - Tasks
  properties:
  - type: OpenAPI
    url: openapi/ledger-investing-tasks-api-openapi.yml
  - type: Documentation
    url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/index.html
  - type: APIReference
    url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/api/index.html
  - type: GettingStarted
    url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/quickstart.html
  - type: DataModel
    url: data-model/ledger-investing-data-model.yml
- aid: ledger-investing:ledger-investing-triangles-api
  name: Ledger Investing Triangles API
  description: Upload, list, retrieve and delete insurance loss triangles.
  humanURL: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/index.html
  baseURL: https://api.korra.com/analytics/
  tags:
  - Triangles
  properties:
  - type: OpenAPI
    url: openapi/ledger-investing-triangles-api-openapi.yml
  - type: Documentation
    url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/index.html
  - type: APIReference
    url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/api/index.html
  - type: GettingStarted
    url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/quickstart.html
  - type: DataModel
    url: data-model/ledger-investing-data-model.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: CapabilityMap
  url: capabilities/ledger-investing-capability-edges.yml
  name: Ledger Investing Business Capability Map
- type: Overlay
  url: overlays/ledger-investing-analytics-overlay.yaml
- type: IssueTracker
  url: https://github.com/LedgerInvesting/ledger-analytics/issues
- type: Releases
  url: https://github.com/LedgerInvesting/ledger-analytics/releases
- type: License
  name: MIT
  url: https://github.com/LedgerInvesting/ledger-analytics/blob/main/LICENSE
- type: AgenticAccess
  url: agentic-access/ledger-investing-agentic-access.yml
- type: Website
  url: https://www.ledgerinvesting.com/
- type: DeveloperPortal
  url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/index.html
- type: Documentation
  url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/index.html
- type: APIReference
  url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/api/index.html
- type: GettingStarted
  url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/quickstart.html
- type: Pricing
  url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/pricing.html
- type: SignUp
  url: https://ledger-investing-ledger-analytics.readthedocs-hosted.com/en/stable/apikeys.html
- type: Support
  url: https://www.ledgerinvesting.com/contact-us
- type: Blog
  url: https://www.ledgerinvesting.com/news
- type: GitHubOrganization
  url: https://github.com/LedgerInvesting
- type: SourceCode
  url: https://github.com/LedgerInvesting/ledger-analytics
- type: TermsOfService
  url: https://www.ledgerinvesting.com/terms-of-use
- type: PrivacyPolicy
  url: https://www.ledgerinvesting.com/privacy
- type: Compliance
  url: https://trust.korra.com
- type: Security
  url: https://trust.korra.com
- type: LinkedIn
  url: https://www.linkedin.com/company/ledger-investing
- type: Twitter
  url: https://x.com/LedgerInvesting
- type: Packages
  url: packages/ledger-investing-packages.yml
- type: SDKs
  url: packages/ledger-investing-packages.yml
- type: Authentication
  url: authentication/ledger-investing-authentication.yml
- type: Conventions
  url: conventions/ledger-investing-conventions.yml
- type: ErrorCatalog
  url: errors/ledger-investing-problem-types.yml
- type: Lifecycle
  url: lifecycle/ledger-investing-lifecycle.yml
- type: Conformance
  url: conformance/ledger-investing-conformance.yml
- type: WellKnown
  url: well-known/ledger-investing-well-known.yml
- type: DomainSecurity
  url: security/ledger-investing-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/ledger-investing-vulnerability-disclosure.yml
- type: TrustCenter
  url: security/ledger-investing-trust-center.yml
- type: X-MCPServerCandidate
  url: mcp/ledger-investing-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: LLMsTxt
  url: llms/ledger-investing-llms.txt
- type: AgentSkill
  url: skills/_index.yml
- type: ChangeLog
  url: changelog/ledger-investing-changelog.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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