# Centers for Medicare and Medicaid Services Auth API

**Canonical:** https://apis.io/apis/cms-gov/cms-auth-api/  
**Provider:** CMS — Centers for Medicare & Medicaid Services — https://apis.io/providers/cms-gov/  
**Base URL:** https://bcda.cms.gov  
**Documentation:** https://bcda.cms.gov/

Centers for Medicare and Medicaid Services Auth API is one of 62 APIs that [CMS — Centers for Medicare & Medicaid Services](https://apis.io/providers/cms-gov/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Authentication. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, a changelog, a GitHub repository, an API reference, and a support channel.

The auth API from Centers for Medicare and Medicaid Services — 3 operation(s) for auth.

## Operations (3)

| Method | Path | Summary |
|---|---|---|
| GET | `/_auth` | Get details about auth |
| POST | `/auth/token` | Get access token |
| GET | `/auth/welcome` | Test authentication |

## Machine-readable artifacts (13)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/cms-gov/refs/heads/main/openapi/cms-auth-api-openapi.yml
- **Documentation** — https://bcda.cms.gov/api-documentation.html
- **ChangeLog** — https://bcda.cms.gov/announcements.html
- **Deprecation** — https://bcda.cms.gov/v3/welcome-v3
- **Sandbox** — https://sandbox.bcda.cms.gov
- **GitHubRepository** — https://github.com/CMSgov/bcda-app
- **Documentation** — https://ab2d.cms.gov/api-documentation
- **APIReference** — https://sandbox.ab2d.cms.gov/swagger-ui/index.html
- **StatusPage** — https://ab2d.cms.gov/status
- **Sandbox** — https://sandbox.ab2d.cms.gov
- **GitHubRepository** — https://github.com/CMSgov/ab2d
- **Support** — https://groups.google.com/u/0/g/cms-ab2d-api
- **AdvancedGuide** — https://ab2d.cms.gov/advanced-user-guide.html

## Other CMS — Centers for Medicare & Medicaid Services APIs (12)

- [CMS — Centers for Medicare & Medicaid Services Articles API](https://apis.io/apis/cms-gov/cms-gov-articles-api/)
- [CMS — Centers for Medicare & Medicaid Services Auth API](https://apis.io/apis/cms-gov/cms-gov-auth-api/)
- [CMS — Centers for Medicare & Medicaid Services Benchmarks API](https://apis.io/apis/cms-gov/cms-gov-benchmarks-api/)
- [CMS — Centers for Medicare & Medicaid Services Bulk Export API](https://apis.io/apis/cms-gov/cms-gov-bulk-export-api/)
- [CMS — Centers for Medicare & Medicaid Services Catalog API](https://apis.io/apis/cms-gov/cms-gov-catalog-api/)
- [CMS — Centers for Medicare & Medicaid Services Coverage API](https://apis.io/apis/cms-gov/cms-gov-coverage-api/)
- [CMS — Centers for Medicare & Medicaid Services Data API](https://apis.io/apis/cms-gov/cms-gov-data-api/)
- [CMS — Centers for Medicare & Medicaid Services Drugs API](https://apis.io/apis/cms-gov/cms-gov-drugs-api/)
- [CMS — Centers for Medicare & Medicaid Services Eligibility API](https://apis.io/apis/cms-gov/cms-gov-eligibility-api/)
- [CMS — Centers for Medicare & Medicaid Services ExplanationOfBenefit API](https://apis.io/apis/cms-gov/cms-gov-explanationofbenefit-api/)
- [CMS — Centers for Medicare & Medicaid Services Geography API](https://apis.io/apis/cms-gov/cms-gov-geography-api/)
- [CMS — Centers for Medicare & Medicaid Services Group API](https://apis.io/apis/cms-gov/cms-gov-group-api/)

## Tags

Authentication

---

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