London Stock Exchange Group

London Stock Exchange Group plc is a United Kingdom-based stock exchange and financial information company headquartered in the City of London, England. LSEG provides capital markets, data and analytics, risk management, and post-trade services including the World-Check screening platform for KYC and anti-money-laundering due diligence.

London Stock Exchange Group publishes 15 APIs on the APIs.io network, including LSEG World-Check One Case API, LSEG World-Check One Media-Check API, LSEG World-Check One Smart Filter API, and 12 more. Tagged areas include Financial, Stock Exchange, Market Data, KYC, and Compliance.

London Stock Exchange Group’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, signup flow, authentication, and 26 more developer resources.

🌐 Visit website 📡 Source on GitHub

52.8/100 developing ▬ flat Agent 37/100 agent ready Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

AccessFreemiumSelf serve⚡ Free to try

15 APIs 1 MCP Servers

FinancialStock ExchangeMarket DataKYCCompliance

Kin Score

Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0

Composite quality — 52.8/100 · developing

Contract Quality 11.1 / 21

Developer Ergonomics 12.4 / 17

Access Clarity 8.5 / 17

Operational Transparency 1.2 / 11

Contract Governance 1.7 / 10

Discoverability 7.9 / 9

Regulatory Posture 7.8 / 15

Agent readiness — 37/100 · agent ready

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 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 4 / 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/london-stock-exchange-group: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 15

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

Open Collections 16

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

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Rate Limits 1

Documented rate limits and quota policies.

London Stock Exchange Group Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

SignUp

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

WellKnown

MCPServer

LLMsTxt

AgentSkill

AgenticAccess

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Components

Conformance

ErrorCatalog

Lifecycle

Conventions

DataModel

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 4

Status, limits, changes, and where to get help

Support

Community

StatusPage

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

TermsOfService

PrivacyPolicy

Plans

FinOps

Company 3

The organization behind the API

Website

Website

Blog

Blog

LinkedIn

Source (apis.yml)

aid: london-stock-exchange-group
name: London Stock Exchange Group
description: London Stock Exchange Group plc is a United Kingdom-based stock exchange and financial information company headquartered
  in the City of London, England. LSEG provides capital markets, data and analytics, risk management, and post-trade services
  including the World-Check screening platform for KYC and anti-money-laundering due diligence.
type: Index
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/london-stock-exchange-group.png
tags:
- Financial
- Stock Exchange
- Market Data
- KYC
- Compliance
url: https://raw.githubusercontent.com/api-evangelist/london-stock-exchange-group/refs/heads/main/apis.yml
created: '2024-04-14'
modified: '2026-07-22'
specificationVersion: '0.23'
apis:
- aid: london-stock-exchange-group:lseg-world-check-one-case-api
  name: LSEG World-Check One Case API
  description: Create, screen, update, archive, assign, link, and search screening cases; review and resolve screening results;
    enable ongoing screening and retrieve ongoing screening updates for KYC and third-party due diligence.
  humanURL: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api
  baseURL: https://api-worldcheck.refinitiv.com/v2
  tags:
  - KYC
  - Screening
  - Compliance
  - Cases
  properties:
  - type: Documentation
    url: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api/documentation
  - type: OpenAPI
    url: openapi/london-stock-exchange-group-case-api-openapi.yml
  - type: Overlay
    url: overlays/london-stock-exchange-group-case-api-overlay.yaml
- aid: london-stock-exchange-group:lseg-world-check-one-media-check-api
  name: LSEG World-Check One Media-Check API
  description: Retrieve MediaCheck adverse-media screening results, article metadata and content, attach or detach articles
    to cases, and mark articles as reviewed.
  humanURL: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api
  baseURL: https://api-worldcheck.refinitiv.com/v2
  tags:
  - KYC
  - Screening
  - Adverse Media
  properties:
  - type: Documentation
    url: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api/documentation
  - type: OpenAPI
    url: openapi/london-stock-exchange-group-media-check-api-openapi.yml
  - type: Overlay
    url: overlays/london-stock-exchange-group-media-check-api-overlay.yaml
- aid: london-stock-exchange-group:lseg-world-check-one-smart-filter-api
  name: LSEG World-Check One Smart Filter API
  description: Enable, disable, and retrieve the MediaCheck smart filter on screening cases.
  humanURL: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api
  baseURL: https://api-worldcheck.refinitiv.com/v2
  tags:
  - KYC
  - Screening
  - Adverse Media
  properties:
  - type: Documentation
    url: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api/documentation
  - type: OpenAPI
    url: openapi/london-stock-exchange-group-smart-filter-api-openapi.yml
  - type: Overlay
    url: overlays/london-stock-exchange-group-smart-filter-api-overlay.yaml
- aid: london-stock-exchange-group:lseg-world-check-one-audit-api
  name: LSEG World-Check One Audit API
  description: Retrieve filtered audit events for screening cases to evidence compliance workflows.
  humanURL: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api
  baseURL: https://api-worldcheck.refinitiv.com/v2
  tags:
  - KYC
  - Audit
  - Compliance
  properties:
  - type: Documentation
    url: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api/documentation
  - type: OpenAPI
    url: openapi/london-stock-exchange-group-audit-api-openapi.yml
  - type: Overlay
    url: overlays/london-stock-exchange-group-audit-api-overlay.yaml
- aid: london-stock-exchange-group:lseg-world-check-one-case-rating-api
  name: LSEG World-Check One Case Rating API
  description: Retrieve and update the risk rating on a screening case.
  humanURL: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api
  baseURL: https://api-worldcheck.refinitiv.com/v2
  tags:
  - KYC
  - Risk
  - Compliance
  properties:
  - type: Documentation
    url: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api/documentation
  - type: OpenAPI
    url: openapi/london-stock-exchange-group-case-rating-api-openapi.yml
  - type: Overlay
    url: overlays/london-stock-exchange-group-case-rating-api-overlay.yaml
- aid: london-stock-exchange-group:lseg-world-check-one-linked-cases-api
  name: LSEG World-Check One Linked Cases API
  description: Create, retrieve, and delete relationships between screening cases.
  humanURL: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api
  baseURL: https://api-worldcheck.refinitiv.com/v2
  tags:
  - KYC
  - Cases
  - Compliance
  properties:
  - type: Documentation
    url: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api/documentation
  - type: OpenAPI
    url: openapi/london-stock-exchange-group-linked-cases-api-openapi.yml
  - type: Overlay
    url: overlays/london-stock-exchange-group-linked-cases-api-overlay.yaml
- aid: london-stock-exchange-group:lseg-world-check-one-group-api
  name: LSEG World-Check One Group API
  description: Retrieve groups, case templates, and resolution toolkits that govern how cases are created and results resolved.
  humanURL: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api
  baseURL: https://api-worldcheck.refinitiv.com/v2
  tags:
  - KYC
  - Administration
  properties:
  - type: Documentation
    url: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api/documentation
  - type: OpenAPI
    url: openapi/london-stock-exchange-group-group-api-openapi.yml
  - type: Overlay
    url: overlays/london-stock-exchange-group-group-api-overlay.yaml
- aid: london-stock-exchange-group:lseg-world-check-one-user-api
  name: LSEG World-Check One User API
  description: List active users in the client account for case assignment.
  humanURL: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api
  baseURL: https://api-worldcheck.refinitiv.com/v2
  tags:
  - KYC
  - Administration
  properties:
  - type: Documentation
    url: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api/documentation
  - type: OpenAPI
    url: openapi/london-stock-exchange-group-user-api-openapi.yml
  - type: Overlay
    url: overlays/london-stock-exchange-group-user-api-overlay.yaml
- aid: london-stock-exchange-group:lseg-world-check-one-reference-api
  name: LSEG World-Check One Reference API
  description: Reference data for screening - countries, nationalities, providers, search filters, World-Check profiles and
    records, and PEP details.
  humanURL: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api
  baseURL: https://api-worldcheck.refinitiv.com/v2
  tags:
  - KYC
  - Reference Data
  properties:
  - type: Documentation
    url: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api/documentation
  - type: OpenAPI
    url: openapi/london-stock-exchange-group-reference-api-openapi.yml
  - type: Overlay
    url: overlays/london-stock-exchange-group-reference-api-overlay.yaml
- aid: london-stock-exchange-group:lseg-world-check-one-client-watchlist-api
  name: LSEG World-Check One Client Watchlist API
  description: Maintain custom client watchlist sources and records for screening.
  humanURL: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api
  baseURL: https://api-worldcheck.refinitiv.com/v2
  tags:
  - KYC
  - Watchlist
  properties:
  - type: Documentation
    url: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api/documentation
  - type: OpenAPI
    url: openapi/london-stock-exchange-group-client-watchlist-api-openapi.yml
  - type: Overlay
    url: overlays/london-stock-exchange-group-client-watchlist-api-overlay.yaml
- aid: london-stock-exchange-group:lseg-world-check-one-reporting-api
  name: LSEG World-Check One Reporting API
  description: Submit asynchronous case report requests, poll report status, and download completed reports.
  humanURL: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api
  baseURL: https://api-worldcheck.refinitiv.com/v2
  tags:
  - KYC
  - Reporting
  properties:
  - type: Documentation
    url: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api/documentation
  - type: OpenAPI
    url: openapi/london-stock-exchange-group-reporting-api-openapi.yml
  - type: Overlay
    url: overlays/london-stock-exchange-group-reporting-api-overlay.yaml
- aid: london-stock-exchange-group:lseg-world-check-one-upcoming-api
  name: LSEG World-Check One Upcoming API
  description: Report status listing, report error details, and report cancellation operations.
  humanURL: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api
  baseURL: https://api-worldcheck.refinitiv.com/v2
  tags:
  - KYC
  - Reporting
  properties:
  - type: Documentation
    url: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api/documentation
  - type: OpenAPI
    url: openapi/london-stock-exchange-group-upcoming-api-openapi.yml
  - type: Overlay
    url: overlays/london-stock-exchange-group-upcoming-api-overlay.yaml
- aid: london-stock-exchange-group:lseg-world-check-one-passport-check-api
  name: LSEG World-Check One Passport Check API
  description: Generate machine-readable zone (MRZ) data for passport verification.
  humanURL: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api
  baseURL: https://api-worldcheck.refinitiv.com/v2
  tags:
  - KYC
  - Identity Verification
  properties:
  - type: Documentation
    url: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api/documentation
  - type: OpenAPI
    url: openapi/london-stock-exchange-group-passport-check-api-openapi.yml
  - type: Overlay
    url: overlays/london-stock-exchange-group-passport-check-api-overlay.yaml
- aid: london-stock-exchange-group:lseg-world-check-one-zfs-api
  name: LSEG World-Check One Zero Footprint Screening API
  description: Zero Footprint Screening surface - synchronous screening, groups, case templates, reference data, and client
    watchlist maintenance without persisting case data.
  humanURL: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-zero-footprint-screening-api
  baseURL: https://api-worldcheck.refinitiv.com/v2
  tags:
  - KYC
  - Screening
  - Zero Footprint
  properties:
  - type: Documentation
    url: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api/documentation
  - type: OpenAPI
    url: openapi/london-stock-exchange-group-zfs-api-openapi.yml
  - type: Overlay
    url: overlays/london-stock-exchange-group-zfs-api-overlay.yaml
- aid: london-stock-exchange-group:lseg-world-check-one-api-info-api
  name: LSEG World-Check One API Info API
  description: Retrieve information about the public API, including the current API version.
  humanURL: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api
  baseURL: https://api-worldcheck.refinitiv.com/v2
  tags:
  - KYC
  - Metadata
  properties:
  - type: Documentation
    url: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api/documentation
  - type: OpenAPI
    url: openapi/london-stock-exchange-group-api-info-api-openapi.yml
  - type: Overlay
    url: overlays/london-stock-exchange-group-api-info-api-overlay.yaml
common:
- type: Website
  url: https://www.lseg.com/
- type: DeveloperPortal
  url: https://developers.lseg.com/
- type: Documentation
  url: https://developers.lseg.com/en/api-catalog
- type: APIReference
  url: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api/documentation
- type: GettingStarted
  url: https://developers.lseg.com/en/api-catalog/customer-and-third-party-screening/world-check-one-api/quick-start
- type: Support
  url: https://support.lseg.com/
- type: Community
  url: https://community.developers.lseg.com/
- type: Blog
  url: https://developers.lseg.com/en/article-catalog
- type: SignUp
  url: https://developers.lseg.com/en/register
- type: StatusPage
  url: https://liveservice.lseg.com/
- type: TermsOfService
  url: https://www.lseg.com/en/policies/website-terms-of-use
- type: PrivacyPolicy
  url: https://www.lseg.com/en/policies/privacy-statement
- type: GitHubOrganization
  url: https://github.com/LSEG
- type: LinkedIn
  url: https://www.linkedin.com/company/london-stock-exchange-group
- type: Authentication
  url: authentication/london-stock-exchange-group-authentication.yml
- type: Packages
  url: packages/london-stock-exchange-group-packages.yml
- type: SDKs
  url: packages/london-stock-exchange-group-packages.yml
- type: Components
  url: components/london-stock-exchange-group-components.yml
- type: WellKnown
  url: well-known/london-stock-exchange-group-well-known.yml
- type: MCPServer
  url: mcp/london-stock-exchange-group-mcp.yml
- type: LLMsTxt
  url: llms/london-stock-exchange-group-llms.txt
- type: Conformance
  url: conformance/london-stock-exchange-group-conformance.yml
- type: ErrorCatalog
  url: errors/london-stock-exchange-group-problem-types.yml
- type: Lifecycle
  url: lifecycle/london-stock-exchange-group-lifecycle.yml
- type: Sandbox
  url: sandbox/london-stock-exchange-group-sandbox.yml
- type: Conventions
  url: conventions/london-stock-exchange-group-conventions.yml
- type: DataModel
  url: data-model/london-stock-exchange-group-data-model.yml
- type: AgentSkill
  url: skills/_index.yml
- type: RateLimits
  url: rate-limits/london-stock-exchange-group-rate-limits.yml
- type: Plans
  url: plans/london-stock-exchange-group-plans-pricing.yml
- type: FinOps
  url: finops/london-stock-exchange-group-finops.yml
- type: AgenticAccess
  url: agentic-access/london-stock-exchange-group-agentic-access.yml
- type: DomainSecurity
  url: security/london-stock-exchange-group-domain-security.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com