LSEG

LSEG (London Stock Exchange Group) is a leading global financial markets infrastructure and data provider, offering a broad range of services including data & analytics, FTSE Russell indices, trading venues, FX, post‑trade solutions and risk intelligence. It serves customers worldwide, enabling sustainable growth and stability through trusted data and innovative technology platforms.

LSEG is profiled on the APIs.io network. Tagged areas include Company, Finance, Data, Infrastructure, and Markets.

LSEG’s developer surface includes sandbox, support, getting-started guide, documentation, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub
18.5/100 emerging Agent 15/100 agent aware Full breakdown ↓
scored 2026-09-21 · rubric v0.22.0
0 APIs
CompanyFinanceDataInfrastructureMarkets

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-21 · rubric v0.22.0
Composite quality — 18.5/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 8.6 / 20
Access Clarity 4.2 / 20
Operational Transparency 0.7 / 13
Contract Governance 0.0 / 12
Discoverability 5.0 / 10
Agent readiness — 15/100 · agent aware
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 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
Delegated User Identity 6 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 6 / 6
Agentic Commerce Well-Known Document 0 / 5
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.
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/lseg: 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 →

Security Posture 1

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

Lseg Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

Sandbox
Sandbox
 DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

WellKnown
WellKnown

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

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 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: lseg
name: LSEG
image: https://www.lseg.com/content/dam/lseg/en_us/images/logos/thumbnail/lseg-default-social-image.jpg.transform/rect-768/q90/image.jpg
description: LSEG (London Stock Exchange Group) is a leading global financial markets infrastructure and data provider, offering
  a broad range of services including data & analytics, FTSE Russell indices, trading venues, FX, post‑trade solutions and
  risk intelligence. It serves customers worldwide, enabling sustainable growth and stability through trusted data and innovative
  technology platforms.
url: https://raw.githubusercontent.com/api-evangelist/lseg/refs/heads/main/apis.yml
x-type: company
x-source: harvest:news
x-tier: profiled
x-tier-reason: enrichment pass 2026-09-21 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-09-21'
modified: '2026-09-21'
tags:
- Company
- Finance
- Data
- Infrastructure
- Markets
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: WellKnown
  url: well-known/lseg-well-known.yml
- type: Conventions
  url: conventions/lseg-conventions.yml
- type: Sandbox
  url: sandbox/lseg-sandbox.yml
- type: TermsOfService
  url: https://developers.lseg.com/en/terms-of-use
- type: Support
  url: https://support.lseg.com/s/
- type: PrivacyPolicy
  url: https://www.lseg.com/en/policies/privacy-statement
- type: DeveloperPortal
  url: https://developers.lseg.com/en
- type: GettingStarted
  url: https://developers.lseg.com/en/api-catalog/app-studio/app-studio-web-sdk/quickstart
- type: Documentation
  url: https://developers.lseg.com/
- type: GitHubOrganization
  url: https://github.com/LSEG
- type: DomainSecurity
  url: security/lseg-domain-security.yml
- type: Website
  url: https://www.lseg.com/
apis: []
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: Developer portal pages are rendered via JavaScript and provide no machine‑readable OpenAPI or other contract.
  evidence:
  - url: https://developers.lseg.com/en
    status: 200
  checked: 2026-09-21
x-enrichment:
  date: '2026-09-21'
  status: enriched
  artifacts_added: 6
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local

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