CMS — Centers for Medicare & Medicaid Services

Centers for Medicare and Medicaid Services 4. Capabilities API

Provide the standard required FHIR capability statement

GitHub OpenAPI

Operations 1

GET /api/v1/fhir/metadata Request the FHIR capability statement detailing what operations this API… #

Documentation

📖
Documentation
https://bcda.cms.gov/api-documentation.html
📖
Documentation
https://ab2d.cms.gov/api-documentation
📖
APIReference
https://sandbox.ab2d.cms.gov/swagger-ui/index.html

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/cms-gov/refs/heads/main/openapi/cms-4-capabilities-api-openapi.yml

SDKs

📦
GitHubRepository
https://github.com/CMSgov/bcda-app
📦
GitHubRepository
https://github.com/CMSgov/ab2d

Other Resources

🔗
ChangeLog
https://bcda.cms.gov/announcements.html
🔗
Deprecation
https://bcda.cms.gov/v3/welcome-v3
🔗
Sandbox
https://sandbox.bcda.cms.gov
🔗
StatusPage
https://ab2d.cms.gov/status
🔗
Sandbox
https://sandbox.ab2d.cms.gov
🔗
Support
https://groups.google.com/u/0/g/cms-ab2d-api
🔗
AdvancedGuide
https://ab2d.cms.gov/advanced-user-guide.html

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/cms-4-capabilities-api"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

cms-4-capabilities-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: AB2D 4. Capabilities API
  description: This API Provides Part A (Hospital Insurance) & B (Medical Insurance) claim data to Part D (Prescription Drug Benefit) sponsors.
servers:
- url: https://sandbox.ab2d.cms.gov
  description: Generated server url
security:
- bearerAuth: []
tags:
- name: 4. Capabilities
  description: Provide the standard required FHIR capability statement
paths:
  /api/v1/fhir/metadata:
    get:
      tags:
      - 4. Capabilities
      summary: Request the FHIR capability statement detailing what operations this API…
      operationId: capabilityStatement_2
      responses:
        '200':
          description: A JSON FHIR capability statement matching  https://www.hl7.org/fhir/STU3/capabilitystatement.html
          headers:
            Content-Type:
              description: application/json
              style: simple
          content:
            application/json:
              schema:
                type: string
components:
  securitySchemes:
    bearerAuth:
      type: http
      name: bearerAuth
      scheme: bearer
      bearerFormat: JWT