Centers for Medicare and Medicaid Services · Authentication Profile

Cms Authentication

Authentication

Centers for Medicare and Medicaid Services secures its APIs with apiKey across 3 declared security schemes, as derived from its OpenAPI definitions.

MedicareMedicaidHealthcareHealth InsuranceFHIRFederal GovernmentDrug SpendingProvider DataQuality MeasuresClaims Data
Methods: apiKey Schemes: 3 OAuth flows: API key in: header, query

Security Schemes

API Key apiKey
· in: query (apikey)
apiKey apiKey
· in: header (apiKey)
amaLicense apiKey
· in: header (amaLicense)

Source

Authentication Profile

Raw ↑ 
generated: '2026-07-11'
method: derived
source: openapi/marketplace-openapi.json, openapi/ppl-openapi.json
summary:
  types:
  - apiKey
  api_key_in:
  - header
  - query
schemes:
- name: API Key
  type: apiKey
  in: query
  parameter: apikey
  description: Your API key should be included as a query parameter with the request. You can
    [fill out this form](https://cms.gov1.qualtrics.com/jfe/form/SV_4N2GHCJfNuX7n8x) to request
    an API key.
  sources:
  - openapi/marketplace-openapi.json
- name: apiKey
  type: apiKey
  in: header
  parameter: apiKey
  description: All requests must include the `apiKey` header containing your API Key.
  sources:
  - openapi/ppl-openapi.json
- name: amaLicense
  type: apiKey
  in: header
  parameter: amaLicense
  description: All requests must include the `amaLicense` header containing your AMA License.
  sources:
  - openapi/ppl-openapi.json