CMS — Centers for Medicare & Medicaid Services
The Centers for Medicare & Medicaid Services (CMS) is the U.S. federal agency within the Department of Health and Human Services that administers Medicare, Medicaid, the Children's Health Insurance Program (CHIP), the Health Insurance Marketplace, and the broader CMS open-data program. CMS operates one of the largest collections of HL7 FHIR APIs in the U.S. federal government — Blue Button 2.0, BCDA, AB2D, DPC, and the upstream BFD server — alongside the Marketplace API, the data.cms.gov open-data catalog, the Provider Data Catalog, the Quality Payment Program API, and the Medicare Coverage Database.
CMS — Centers for Medicare & Medicaid Services publishes 25 APIs on the APIs.io network, including Articles API, Auth API, Benchmarks API, and 22 more. Tagged areas include Healthcare, Medicare, Medicaid, FHIR, and Bulk Data.
The CMS — Centers for Medicare & Medicaid Services catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.
CMS — Centers for Medicare & Medicaid Services’ developer surface includes authentication, developer portal, support, sandbox, engineering blog, privacy policy, documentation, and 20 more developer resources.
Kin Score
APIs 25
Individual APIs this provider publishes, each with its own machine-readable definition.
CMS — Centers for Medicare & Medicaid Services Articles API
The Articles API from CMS — Centers for Medicare & Medicaid Services — 1 operation(s) for articles.
CMS — Centers for Medicare & Medicaid Services Auth API
The Auth API from CMS — Centers for Medicare & Medicaid Services — 2 operation(s) for auth.
CMS — Centers for Medicare & Medicaid Services Benchmarks API
The Benchmarks API from CMS — Centers for Medicare & Medicaid Services — 1 operation(s) for benchmarks.
CMS — Centers for Medicare & Medicaid Services Bulk Export API
The Bulk Export API from CMS — Centers for Medicare & Medicaid Services — 10 operation(s) for bulk export.
CMS — Centers for Medicare & Medicaid Services Catalog API
The Catalog API from CMS — Centers for Medicare & Medicaid Services — 4 operation(s) for catalog.
CMS — Centers for Medicare & Medicaid Services Coverage API
The Coverage API from CMS — Centers for Medicare & Medicaid Services — 2 operation(s) for coverage.
CMS — Centers for Medicare & Medicaid Services Data API
The Data API from CMS — Centers for Medicare & Medicaid Services — 4 operation(s) for data.
CMS — Centers for Medicare & Medicaid Services Drugs API
The Drugs API from CMS — Centers for Medicare & Medicaid Services — 1 operation(s) for drugs.
CMS — Centers for Medicare & Medicaid Services Eligibility API
The Eligibility API from CMS — Centers for Medicare & Medicaid Services — 1 operation(s) for eligibility.
CMS — Centers for Medicare & Medicaid Services ExplanationOfBenefit API
The ExplanationOfBenefit API from CMS — Centers for Medicare & Medicaid Services — 2 operation(s) for explanationofbenefit.
CMS — Centers for Medicare & Medicaid Services Geography API
The Geography API from CMS — Centers for Medicare & Medicaid Services — 1 operation(s) for geography.
CMS — Centers for Medicare & Medicaid Services Group API
The Group API from CMS — Centers for Medicare & Medicaid Services — 2 operation(s) for group.
CMS — Centers for Medicare & Medicaid Services Issuers API
The Issuers API from CMS — Centers for Medicare & Medicaid Services — 1 operation(s) for issuers.
CMS — Centers for Medicare & Medicaid Services LCD API
The LCD API from CMS — Centers for Medicare & Medicaid Services — 2 operation(s) for lcd.
CMS — Centers for Medicare & Medicaid Services Measurements API
The Measurements API from CMS — Centers for Medicare & Medicaid Services — 1 operation(s) for measurements.
CMS — Centers for Medicare & Medicaid Services MEDCAC API
The MEDCAC API from CMS — Centers for Medicare & Medicaid Services — 1 operation(s) for medcac.
CMS — Centers for Medicare & Medicaid Services Metadata API
The Metadata API from CMS — Centers for Medicare & Medicaid Services — 2 operation(s) for metadata.
CMS — Centers for Medicare & Medicaid Services NCD API
The NCD API from CMS — Centers for Medicare & Medicaid Services — 2 operation(s) for ncd.
CMS — Centers for Medicare & Medicaid Services Organization API
The Organization API from CMS — Centers for Medicare & Medicaid Services — 2 operation(s) for organization.
CMS — Centers for Medicare & Medicaid Services Patient API
The Patient API from CMS — Centers for Medicare & Medicaid Services — 2 operation(s) for patient.
CMS — Centers for Medicare & Medicaid Services Plans API
The Plans API from CMS — Centers for Medicare & Medicaid Services — 2 operation(s) for plans.
CMS — Centers for Medicare & Medicaid Services Practitioner API
The Practitioner API from CMS — Centers for Medicare & Medicaid Services — 2 operation(s) for practitioner.
CMS — Centers for Medicare & Medicaid Services Providers API
The Providers API from CMS — Centers for Medicare & Medicaid Services — 1 operation(s) for providers.
CMS — Centers for Medicare & Medicaid Services Scoring API
The Scoring API from CMS — Centers for Medicare & Medicaid Services — 1 operation(s) for scoring.
CMS — Centers for Medicare & Medicaid Services Submissions API
The Submissions API from CMS — Centers for Medicare & Medicaid Services — 2 operation(s) for submissions.
Scroll for all 25
Open Collections 10
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
CMS AB2D API
OPEN COLLECTIONCMS Beneficiary Claims Data API (BCDA)
OPEN COLLECTIONCMS Beneficiary FHIR Data Server (BFD)
OPEN COLLECTIONCMS Blue Button 2.0 API
OPEN COLLECTIONCMS Data at the Point of Care API (DPC)
OPEN COLLECTIONCMS Marketplace API
OPEN COLLECTIONCMS Medicare Coverage Database API
OPEN COLLECTIONCMS Open Data API (data.cms.gov)
OPEN COLLECTIONCMS Provider Data Catalog API
OPEN COLLECTIONCMS Quality Payment Program API
OPEN COLLECTIONScroll for all 10
Rate Limits 1
Documented rate limits and quota policies.
Cms Gov Rate Limits
RATE LIMITSSemantic Vocabularies 1
JSON-LD contexts and semantic vocabularies used across these APIs.
Cms Gov Context
JSON-LDSpectral Rules 2
Spectral governance rulesets for linting and validating these APIs.
JSON Schema 3
Standalone JSON Schema definitions for this provider's data models.
Examples 4
Example request and response payloads for these APIs.
Cms Gov Bcda Job Example
EXAMPLECms Gov Patient Example
EXAMPLESecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Scopes 1
OAuth scopes governing access to this provider's APIs.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 6
Portal, sign-up, and the first successful call
Documentation 4
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 5
Authentication, authorization, and security posture
Operate 6
Status, limits, changes, and where to get help
Commercial 1
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API
Other 1
Properties that don't map to a standard resource type