# Centers for Medicare and Medicaid Services API Reference API

**Canonical:** https://apis.io/apis/cms/cms-api-reference-api/  
**Provider:** Centers for Medicare and Medicaid Services — https://apis.io/providers/cms/  
**Base URL:** https://marketplace.api.healthcare.gov/api/v1  
**Documentation:** https://developer.cms.gov/marketplace-api/

Centers for Medicare and Medicaid Services API Reference API is one of 41 APIs that [Centers for Medicare and Medicaid Services](https://apis.io/providers/cms/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include API Reference. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, authentication docs, and a GitHub repository.

Information about the state of Marketplace API.

## Machine-readable artifacts (7)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/cms/refs/heads/main/openapi/cms-api-reference-api-openapi.yml
- **Documentation** — https://developer.cms.gov/marketplace-api/
- **Authentication** — https://developer.cms.gov/marketplace-api/key-request.html
- **Documentation** — https://bluebutton.cms.gov/api-documentation
- **Sandbox** — https://sandbox.bluebutton.cms.gov/v1/accounts/login
- **GitHubRepository** — https://github.com/CMSgov/bluebutton-web-server
- **Documentation** — https://developer.cms.gov/ppl-api/

## Other Centers for Medicare and Medicaid Services APIs (12)

- [CMS Data at the Point of Care (DPC) API](https://apis.io/apis/cms/cms-data-at-the-point-of-care-dpc-api/)
- [CMS Finder API](https://apis.io/apis/cms/cms-finder-api/)
- [CMS Quality Payment Program (QPP) Submissions API](https://apis.io/apis/cms/cms-quality-payment-program-qpp-submissions-api/)
- [Centers for Medicare and Medicaid Services Bulk Data API](https://apis.io/apis/cms/cms-bulk-data-api/)
- [Centers for Medicare and Medicaid Services Code Search API](https://apis.io/apis/cms/cms-code-search-api/)
- [Centers for Medicare and Medicaid Services Cost Search API](https://apis.io/apis/cms/cms-cost-search-api/)
- [Centers for Medicare and Medicaid Services Enrollments API](https://apis.io/apis/cms/cms-enrollments-api/)
- [Centers for Medicare and Medicaid Services Geography API](https://apis.io/apis/cms/cms-geography-api/)
- [Centers for Medicare and Medicaid Services Households & Eligibility API](https://apis.io/apis/cms/cms-households-eligibility-api/)
- [Centers for Medicare and Medicaid Services Insurance Issuers API](https://apis.io/apis/cms/cms-insurance-issuers-api/)
- [Centers for Medicare and Medicaid Services Insurance Plans API](https://apis.io/apis/cms/cms-insurance-plans-api/)
- [Centers for Medicare and Medicaid Services Plans API](https://apis.io/apis/cms/cms-plans-api/)

## Tags

API Reference

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