# Firms API

**Canonical:** https://apis.io/apis/thomson-reuters/firms-api/  
**Provider:** Thomson Reuters — https://apis.io/providers/thomson-reuters/  
**Base URL:** https://api.thomsonreuters.com/legal-tracker/firms-api/v2  
**Documentation:** https://developers.thomsonreuters.com/pages/api-catalog/332f4a37-ea21-4132-8647-853ca160461f

Firms API is one of 324 APIs that [Thomson Reuters](https://apis.io/providers/thomson-reuters/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Legal and Legal Tracker. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

The Firms API provides access to Firms metadata in the Tracker Company and TrackerMaster databases.

## Operations (17)

| Method | Path | Summary |
|---|---|---|
| GET | `/Firms` | Get entities from Firms |
| GET | `/Firms('{FirmId}')` | Get entity from Firms by key |
| GET | `/Firms('{FirmId}')/Invoices` | Get entities from related Invoices |
| GET | `/Firms('{FirmId}')/Budgets` | Get entities from related Budgets |
| GET | `/Firms('{FirmId}')/Accruals` | Get entities from related Accruals |
| GET | `/Firms('{FirmId}')/InvoiceLines` | Get entities from related InvoiceLines |
| GET | `/Firms('{FirmId}')/Timekeepers` | Get entities from related Timekeepers |
| GET | `/Firms('{FirmId}')/MatterFirms` | Get entities from related MatterFirms |
| GET | `/Firms('{FirmId}')/TimekeeperRateSheets` | Get entities from related TimekeeperRateSheets |
| GET | `/Firms('{FirmId}')/MatterParticipants` | Get entities from related MatterParticipants |
| GET | `/Firms('{FirmId}')/InvoiceReductions` | Get entities from related InvoiceReductions |
| GET | `/Firms('{FirmId}')/InvoiceTaxes` | Get entities from related InvoiceTaxes |
| GET | `/firms` | Get firms connected to the company |
| GET | `/firms/{id}` | Get a firm profile |
| PATCH | `/firms/{id}` | Update a firm profile |
| GET | `/firms/{id}/offices/{officeId}` | Get an office profile |
| PATCH | `/firms/{id}/offices/{officeId}` | Update an office profile |

## Machine-readable artifacts (3)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/thomson-reuters/refs/heads/main/openapi/thomson-reuters-firms-api-openapi.yml
- **OpenAPI** — https://api.thomsonreuters.com/developer-experience/content/v1/documents/api-reference/333dd2b4-bb0d-45ac-8c5c-389ffe8b38fe
- **Documentation** — https://developers.thomsonreuters.com/pages/api-catalog/332f4a37-ea21-4132-8647-853ca160461f

## Other Thomson Reuters APIs (12)

- [Thomson Reuters Westlaw API](https://apis.io/apis/thomson-reuters/westlaw-api/)
- [Thomson Reuters Checkpoint API](https://apis.io/apis/thomson-reuters/checkpoint-api/)
- [Thomson Reuters Risk and Fraud API](https://apis.io/apis/thomson-reuters/risk-fraud-api/)
- [Datasets API](https://apis.io/apis/thomson-reuters/datasets-api/)
- [Exports API](https://apis.io/apis/thomson-reuters/exports-api/)
- [Tax Return Import/Export API](https://apis.io/apis/thomson-reuters/tax-return-import-export-api/)
- [Companies API](https://apis.io/apis/thomson-reuters/companies-api/)
- [Prints API](https://apis.io/apis/thomson-reuters/prints-api/)
- [Reports API](https://apis.io/apis/thomson-reuters/reports-api/)
- [Matters API](https://apis.io/apis/thomson-reuters/matters-api/)
- [Users API](https://apis.io/apis/thomson-reuters/users-api/)
- [Thomson Reuters Account API](https://apis.io/apis/thomson-reuters/thomson-reuters-account-api/)

## Tags

Legal, Legal Tracker

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/thomson-reuters/firms-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/thomson-reuters/.