# Express Scripts Partner APIs

**Canonical:** https://apis.io/apis/express-scripts-holding/express-scripts-holding-partner-apis/  
**Provider:** Express Scripts Holding — https://apis.io/providers/express-scripts-holding/  
**Base URL:** https://api.express-scripts.io  
**Documentation:** https://developer.express-scripts.com/service-apis

Express Scripts Partner APIs is published by [Express Scripts Holding](https://apis.io/providers/express-scripts-holding/) on the [APIs.io](https://apis.io/) network. Tagged areas include Pharmacy Benefit Management, Prescriptions, Claims, and Healthcare. The published artifact set on APIs.io includes authentication docs.

The partner-facing API estate Express Scripts exposes through its own gateway. The production host api.express-scripts.io and the sandbox host api-sandbox.express-scripts.io both answer HTTP 401 to every anonymous request, including /.well-known/* paths, so the gateway authenticates before it routes. Both hosts were discovered in the developer portal's own deployed runtime configuration, where they are declared as hsGateway.gateway and apiSandbox.url. No OpenAPI, GraphQL SDL, AsyncAPI, Protobuf or WSDL is published for this estate at any anonymously reachable URL.

## Machine-readable artifacts (3)

- **Sandbox** — https://raw.githubusercontent.com/api-evangelist/express-scripts-holding/refs/heads/main/sandbox/express-scripts-holding-sandbox.yml
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/express-scripts-holding/refs/heads/main/authentication/express-scripts-holding-authentication.yml
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/express-scripts-holding/refs/heads/main/apis.yml

## Tags

Pharmacy Benefit Management, Prescriptions, Claims, Healthcare

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/express-scripts-holding/express-scripts-holding-partner-apis/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/express-scripts-holding/.