Long-Term Stock Exchange

The Long-Term Stock Exchange (LTSE) is a U.S. Securities and Exchange Commission-registered national securities exchange headquartered in New York, built to support companies and investors committed to long-term value creation. LTSE operates a principles-based equities trading platform that accepts order entry over the MEMO FIX and MEMO SBE (Simple Binary Encoding) protocols and distributes real-time market data - depth of book, top of book, and last sale - via the MEMOIR multicast feed. Beyond the exchange it offers private-markets and cap-table software plus long-term listing standards. LTSE does not publish a public REST/OpenAPI developer API; participant connectivity (Direct, Extranet, Telco via NY4) and technical specifications are provided through its Market Operations team.

Long-Term Stock Exchange is profiled on the APIs.io network. Tagged areas include Company, Stock Exchange, Capital Markets, Financial Services, and Market Data.

Long-Term Stock Exchange’s developer surface includes documentation, support, engineering blog, pricing, and 4 more developer resources.

🌐 Visit website 📡 Source on GitHub

18.3/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyStock ExchangeCapital MarketsFinancial ServicesMarket DataTradingSecuritiesFIX Protocol

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 18.3/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 3.0 / 20

Commercial Clarity 6.3 / 20

Operational Transparency 0.0 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

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 0 / 4

Consent & Bot Identity 0 / 3

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/long-term-stock-exchange: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: long-term-stock-exchange
name: Long-Term Stock Exchange
description: The Long-Term Stock Exchange (LTSE) is a U.S. Securities and Exchange Commission-registered national securities
  exchange headquartered in New York, built to support companies and investors committed to long-term value creation. LTSE
  operates a principles-based equities trading platform that accepts order entry over the MEMO FIX and MEMO SBE (Simple Binary
  Encoding) protocols and distributes real-time market data - depth of book, top of book, and last sale - via the MEMOIR multicast
  feed. Beyond the exchange it offers private-markets and cap-table software plus long-term listing standards. LTSE does not
  publish a public REST/OpenAPI developer API; participant connectivity (Direct, Extranet, Telco via NY4) and technical specifications
  are provided through its Market Operations team.
url: https://raw.githubusercontent.com/api-evangelist/long-term-stock-exchange/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
- obvious-ventures
x-tier: stub
x-tier-reason: portfolio-lead
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
image: https://cdn.prod.website-files.com/6462417e8db99f8baa069524/646243a7917deda53e272fee_LTSE%20Desktop.svg
tags:
- Company
- Stock Exchange
- Capital Markets
- Financial Services
- Market Data
- Trading
- Securities
- FIX Protocol
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/long-term-stock-exchange-domain-security.yml
- type: Website
  url: https://ltse.com
- type: Documentation
  url: https://ltse.com/trading/user-guide-technical-specifications
- type: Support
  url: https://ltse.com/contact
- type: Blog
  url: https://ltse.com/insights
- type: Pricing
  url: https://ltse.com/trading/fees-and-incentives
- type: TermsOfService
  url: https://ltse.com/terms-of-use
- type: PrivacyPolicy
  url: https://ltse.com/privacy
x-enrichment:
  date: '2026-07-20'
  status: minimal
  artifacts_added: 2
  pass: local-v1