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

12.9/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-08-21 · rubric v0.12.0

0 APIs

Company Stock Exchange Capital Markets Financial-Services Market Data Trading Securities FIX Protocol

Kin Score

Kin Score How this is scored →
scored 2026-08-21 · rubric v0.12.0

Composite quality — 12.9/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 2.8 / 17

Access Clarity 5.4 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.3 / 9

Regulatory Posture 3.5 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Regulatory Posture applies to this provider. Its tags matched the Securities & Market Data 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.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% 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/. 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: '0.23'
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
tags_raw:
- 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

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