Secure Power Apps external API integrations
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Protect Power Apps API connections with secure identity, backend controls, DLP, environment boundaries and lifecycle reviews.
TL;DR
Use OAuth 2.0 and Microsoft Entra ID where supported, and keep API keys, client secrets and bearer tokens out of Power Apps formulas, variables, URLs and client-side requests. For privileged APIs, route requests through Azure API Management or an Azure Function, validate authorization at the API boundary, and use DLP as an additional safeguard.
Original by Softchief Author, on Softchief Technologies. Read the original
This is our own summary, not a republication or full translation.
Governance takeaway
- Makers: Do not store API keys, client secrets or bearer tokens in formulas, variables, URLs or client-side requests, because users may inspect them.
- Admins/CoE: Restrict custom connector editing, review connection owners and apply DLP policies, because connector governance does not replace API authorization.
- Security/Compliance: Require API or backend checks for roles, record ownership, inputs and returned fields, because hidden screens and disabled buttons can be bypassed.
- Leadership/Business: Maintain separate development, test and production settings with release reviews, so test credentials and endpoints do not reach live apps.
Frequently asked questions
How should Power Apps store credentials for an external API?
Do not place keys, client secrets or bearer tokens in client-side app content. Use connector-managed authentication or a secured backend for privileged credentials.
When should a Power App use Azure API Management or an Azure Function for an API?
Use a backend when an API requires privileged credentials, request validation, throttling or filtered responses. It can enforce rules before the request reaches the target service.
What does a Power Platform DLP policy protect in an external API integration?
DLP policies control which connectors can work together and share data. They govern data movement, but do not perform API authorization or record-level access checks.