generated: '2026-06-20'
method: searched
source: https://developer.microsoft.com/en-us/microsoft-365/dev-program + https://developer.microsoft.com/en-us/graph/graph-explorer
sandbox:
  model: developer-tenant
  note: >-
    Microsoft does not use test-vs-live API keys. Instead it provides a free, isolated
    Microsoft 365 developer tenant pre-provisioned with sample users, mail, files, and
    SharePoint content, plus a browser console (Graph Explorer) with a shared sample
    tenant for zero-setup calls.
developer_program:
  name: Microsoft 365 Developer Program
  url: https://developer.microsoft.com/en-us/microsoft-365/dev-program
  provides:
  - A free, renewable Microsoft 365 E5 developer subscription (sandbox tenant).
  - Option to auto-provision sample data (users, groups, mail, Word/Excel/PowerPoint files, SharePoint sites).
  - Up to 25 user licenses for building and testing.
console:
  name: Graph Explorer
  url: https://developer.microsoft.com/en-us/graph/graph-explorer
  provides:
  - Sign in with your own tenant OR use the built-in sample data tenant (no sign-in) to run read requests.
  - Pre-populated sample queries including OneDrive/SharePoint DriveItem calls.
  - Access-token inspection, permission consent UI, and code snippets in C#/JS/Java/Go/PHP/PowerShell.
addins_testing:
  note: >-
    Word add-ins built on the Office JavaScript API are sideloaded for local testing;
    the Yeoman generator scaffolds a project that runs against a local dev server before
    publishing to AppSource.
  docs: https://learn.microsoft.com/en-us/office/dev/add-ins/testing/test-debug-office-add-ins
test_values: none-published