> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.joincandidhealth.com/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.joincandidhealth.com/_mcp/server.

## Environments Overview

We have two different environments that you can integrate with:

* Production ([https://api.joincandidhealth.com](https://api.joincandidhealth.com))
* Sandbox ([https://api-staging.joincandidhealth.com](https://api-staging.joincandidhealth.com))

When you are getting onboarded to Candid, you will receive a pair of client ID and client secret for each environment.

> **Warning**
>
> Trying to use one pair of credentials in the other environment will result in an error.

## Using Sandbox

You can use the Sandbox environment to test your integration before going live. Although be aware that:

1. PHI is **not allowed** in Sandbox. Please use fake data when testing.
2. Not all functionality is available in the Sandbox environment:

* Eligibility checks are sample data only provided through the clearinghouse Change Healthcare.
* Claims submitted are not run through the full rules engine. In particular, claims will not be submitted and therefore not adjudicated.

> **Info**
>
> In the API documentation, all of the examples will use the production URL `api`.
>
> If you are using the sandbox environment, you will need to replace this with `api-staging`.