About the API
Base URL, credentials, and how to use Try it on these pages.
Every page in this section is generated from the same OpenAPI document that describes the API, so the parameters, examples and response shapes match what the server accepts.
Base URL
https://api.usecapstone.com/v1Try it
Each endpoint page has a Send panel. Paste your key into the authorization field, fill in any parameters, and send the request. The request goes straight from your browser to api.usecapstone.com; the key is never sent to this docs site.
There is no sandbox
cap_test_ keys are a label, not a separate environment. Every request reads and writes real data. GET /api/simulations is read-only and safe to try. send_test and assessment.start email a real invitation to the address you enter, so use an inbox you control.