# CMS — Centers for Medicare & Medicaid Services

**Canonical:** https://apis.io/providers/cms-gov/  
**Website:** https://www.cms.gov/  
**APIs profiled:** 25

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.

## Kin Score — 43.2 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 43.2).

| Facet | Score |
|---|---|
| Discoverability | 68.5 |
| Contract Quality | 60.9 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 26.3 |
| Developer Ergonomics | 45.2 |
| Commercial Clarity | 10.5 |
| Access Clarity | 10.5 |

Regulatory layer — **Government & Public Sector**: 57.4 (matched via tags).

## Agent readiness — 29.1 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (25)

- **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.

## Agentic access (1)

- **Cms Gov Agentic Access** — 71 operations · 14 acting

## Security (2)

- **Cms Gov Authentication** — apiKey/http/mutualTLS/oauth2 · 4 schemes
- **Cms Gov Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Tags

Healthcare, Medicare, Medicaid, FHIR, Bulk Data, Open Data, Government, Federal, Claims, Insurance, ACA, Marketplace, Quality

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/cms-gov/). Scores are computed from the provider's own public artifacts under a published rubric.