Companies API
The Companies API provides access to offices, organizational units and practice groups in the Tracker Company database.
Companies API is one of 324 APIs that Thomson Reuters publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
This API exposes 6 JSON Schema definitions.
Tagged areas include Legal and Legal Tracker. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and 6 JSON Schemas.
This API exposes 1 operation across 1 path, and defines 4 schemas. It is described by OpenAPI 3.2.0, at version 1.0.
Requests are made against 6 base URLs: https://api.thomsonreuters.com/legal-tracker/companylist-api/v1, https://api.thomsonreuters.co.uk/legal-tracker/companylist-api/v1, https://api.thomsonreuters.ca/legal-tracker/companylist-api/v1, https://api.thomsonreuters.com.au/legal-tracker/companylist-api/v1, https://api.thomsonreuters.de/legal-tracker/companylist-api/v1, https://api.thomsonreuters.ae/legal-tracker/companylist-api/v1.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 1
Companies API declares
1 security scheme
for authenticating requests.
It supports OAuth 2.0 (OAuth2) using the clientCredentials flow.
By default, every request must be authenticated.
Paths & Operations 1
Across 1 path, the API surfaces 1 operation — 1 GET. Each is listed below with its method, path, parameters, and response codes.
Use the Companies endpoint to get information about accessible companies.
Schemas 4
The contract defines 4 schemas that model the data the API accepts and returns. The most detailed are Error (5 properties), CompanyInfoModel (4 properties), CompanyInfoCollection (1 property), ErrorResponse (1 property). Each schema is shown below with its type and property counts.
Specification
The full machine-readable OpenAPI contract behind this narrative.
Source
More from Thomson Reuters 12
Other APIs Thomson Reuters publishes across the network.
This is an independent, third-party profile of Companies API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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