CMS Marketplace API
Delivers data that helps users find and evaluate health care insurance plans, providers, and coverage information on the ACA Health Insurance Marketplace. Powers Healthcare.gov and third-party services with plan search, eligibility estimates, drug and provider coverage lookups, and out-of-pocket cost calculations.
Documentation
Documentation
https://developer.cms.gov/marketplace-api/
Authentication
https://developer.cms.gov/marketplace-api/key-request.html