Thomson Reuters

Thomson Reuters provides over 137 APIs across legal, tax and accounting, risk and fraud, and trade and supply industries through their global developer portal. APIs cover Westlaw legal research, Checkpoint tax content, ONESOURCE tax software, HighQ document management, Legal Tracker matter management, and risk and fraud solutions including identity verification and adverse media screening.

Thomson Reuters publishes 6 APIs on the APIs.io network. Tagged areas include Legal, Tax, Finance, Risk, and Fraud.

The Thomson Reuters catalog on APIs.io includes 1 JSON-LD context.

Thomson Reuters’ developer surface includes documentation, engineering blog, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub

13.8/100 emerging ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-08-21 · rubric v0.12.0

AccessFreemium

6 APIs

Legal Tax Finance Risk Fraud Compliance Data

Kin Score

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

Composite quality — 13.8/100 · emerging

Contract Quality 2.8 / 25

Developer Ergonomics 0.0 / 20

Access Clarity 3.2 / 20

Operational Transparency 1.4 / 13

Contract Governance 0.0 / 12

Discoverability 6.5 / 10

Agent readiness — 3/100 · 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 7 / 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

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/thomson-reuters: 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 6

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

Rate Limits 1

Documented rate limits and quota policies.

Thomson Reuters Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Get Started 1

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LlmsText

LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

aid: thomson-reuters
name: Thomson Reuters
description: Thomson Reuters provides over 137 APIs across legal, tax and accounting, risk and fraud, and trade and supply
  industries through their global developer portal. APIs cover Westlaw legal research, Checkpoint tax content, ONESOURCE tax
  software, HighQ document management, Legal Tracker matter management, and risk and fraud solutions including identity verification
  and adverse media screening.
type: Index
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
position: Consumer
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/thomson-reuters.png
tags:
- Legal
- Tax
- Finance
- Risk
- Fraud
- Compliance
- Data
created: '2026-03-16'
modified: '2026-05-03'
url: https://raw.githubusercontent.com/api-evangelist/thomson-reuters/refs/heads/main/apis.yml
specificationVersion: '0.23'
apis:
- aid: thomson-reuters:westlaw-api
  name: Thomson Reuters Westlaw API
  description: Access Westlaw legal research content including case law, statutes, regulations, and secondary sources. Includes
    SEC Filings API, Dockets API, and Litigation Analytics providing structured legal data for integration into knowledge
    management and legal workflow systems.
  humanURL: https://developers.thomsonreuters.com/
  tags:
  - Legal
  - Research
  - Case Law
  - Litigation
  - Westlaw
  properties:
  - type: Documentation
    url: https://developers.thomsonreuters.com/
  - type: GitHubOrganization
    url: https://github.com/thomsonreuters
- aid: thomson-reuters:checkpoint-api
  name: Thomson Reuters Checkpoint API
  description: Checkpoint Search API provides access to Thomson Reuters Checkpoint tax and accounting research content including
    tax regulations, guidance, and analytical tools for tax professionals and accountants.
  humanURL: https://developers.thomsonreuters.com/
  tags:
  - Tax
  - Accounting
  - Check Point
  - Research
  tags_raw:
  - Tax
  - Accounting
  - Checkpoint
  - Research
  properties:
  - type: Documentation
    url: https://developers.thomsonreuters.com/
- aid: thomson-reuters:onesource-api
  name: Thomson Reuters ONESOURCE API
  description: ONESOURCE APIs provide integration with Thomson Reuters tax compliance software including income tax, indirect
    tax, transfer pricing, and global trade management. Enables workflow automation for tax calculations, filings, and reporting.
  humanURL: https://developers.thomsonreuters.com/
  tags:
  - Tax
  - Compliance
  - ONESOURCE
  - Workflows
  tags_raw:
  - Tax
  - Compliance
  - ONESOURCE
  - Workflow
  properties:
  - type: Documentation
    url: https://developers.thomsonreuters.com/
- aid: thomson-reuters:highq-api
  name: Thomson Reuters HighQ API
  description: HighQ APIs support document synchronization between HighQ and external document management systems, enabling
    integration with legal matter management, client collaboration, and document automation workflows.
  humanURL: https://developers.thomsonreuters.com/
  tags:
  - Legal
  - Document-Management
  - HighQ
  - Collaboration
  tags_raw:
  - Legal
  - Document Management
  - HighQ
  - Collaboration
  properties:
  - type: Documentation
    url: https://developers.thomsonreuters.com/
- aid: thomson-reuters:legal-tracker-api
  name: Thomson Reuters Legal Tracker API
  description: Legal Tracker API enables users to create and manage legal matters, invoices, budgets, and vendor relationships
    programmatically, supporting e-billing and legal spend management integrations.
  humanURL: https://developers.thomsonreuters.com/
  tags:
  - Legal
  - Matter Management
  - E-Billing
  - Legal Tracker
  tags_raw:
  - Legal
  - Matter Management
  - E-billing
  - Legal Tracker
  properties:
  - type: Documentation
    url: https://developers.thomsonreuters.com/
- aid: thomson-reuters:risk-fraud-api
  name: Thomson Reuters Risk and Fraud API
  description: Risk and Fraud APIs automate customer onboarding, identity verification, risk assessments, adverse media screening,
    investigations, and compliance monitoring. Includes tools for KYC, AML, and third-party risk management.
  humanURL: https://developers.thomsonreuters.com/
  tags:
  - Risk
  - Fraud
  - KYC
  - AML
  - Identity Verification
  - Compliance
  properties:
  - type: Documentation
    url: https://developers.thomsonreuters.com/
common:
- type: DomainSecurity
  url: security/thomson-reuters-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/thomson-reuters
- type: Website
  url: https://www.thomsonreuters.com/
- type: Documentation
  url: https://developers.thomsonreuters.com/
- type: DeveloperPortal
  url: https://developers.thomsonreuters.com/
- type: GitHubOrganization
  url: https://github.com/thomsonreuters
- type: Blog
  url: https://www.thomsonreuters.com/en/technology/technology-blog.html
- type: Integrations
  url: https://www.thomsonreuters.com/en/apps#t=plp-products&sort=relevancy&layout=card&f:@tr_plp_producttype=[Apps]
- type: LlmsText
  url: https://developers.thomsonreuters.com/llms.txt
integrations:
- name: Waypoint graphic
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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Thomson Reuters

Kin Score

APIs 6

Thomson Reuters Westlaw API

Thomson Reuters Checkpoint API

Thomson Reuters ONESOURCE API

Thomson Reuters HighQ API

Thomson Reuters Legal Tracker API

Thomson Reuters Risk and Fraud API

Pricing Plans 1

Thomson Reuters Plans Pricing