Power App Custom API
Power Apps gets your team 80% of the way to the app they need with no code. The last 20% is where standard connectors run out of road — your legacy ERP doesn't have a connector, your internal API needs a custom auth flow, or the connector exists but doesn't expose the endpoints your app actually needs. We build the custom APIs and connectors that close that gap, so your app makers keep moving without hitting walls.
- Custom Connectors
- REST APIs
- Power Automate
- Low-Code
The teams we build connectors for usually come to us with a half-finished Power App that's been stuck for months because one integration was missing. A well-built custom connector unlocks the whole platform for everything that comes after it.
What We Actually Build
Custom connectors in Power Platform are OpenAPI definitions. Your app makers use them exactly like any built-in connector — no code, just drag and drop. The custom part is completely hidden from the end user.
Custom API Development
REST APIs on Azure Functions or API Management that expose exactly the operations your Power App needs — nothing more, nothing less.
Custom Connector Definition
OpenAPI specification, authentication configuration, and action/trigger definitions registered in your Power Platform environment.
Authentication Handling
OAuth 2.0, API Key, or service account auth — including the tricky flows for APIs that use non-standard token patterns.
Data Transformation
Request and response transformation so the API speaks the same language as your canvas app — no JSON wrangling in the formula bar.
How We Work
- 1
Connector Scoping
We map every operation your app needs from the target system — read, write, lookup, trigger — before building anything.
- 2
API Design
Endpoint design, request/response schemas, error codes, and auth flow documented as an OpenAPI spec first.
- 3
Build & Test
Backend API built and tested independently. Custom connector created and tested end-to-end with real Power App user flows.
- 4
Deploy & Document
Connector deployed to your environment, maker documentation written, and your app makers walked through using each action.
What You Get
Custom connector registered in your Power Platform environment
Backend API deployed on Azure Functions or API Management
OpenAPI definition file for the connector
Authentication configuration and connection documentation
Maker documentation showing each action with example inputs and outputs
Demo Power App walking through each connector action
Who This Is For
Power App talking to a legacy system
Your ERP from 2010 has a SOAP API. We wrap it in a clean REST adapter, build a custom connector, and your app maker can query it like any modern API.
Exposing internal services to citizen developers
Your dev team has built solid APIs. We build a custom connector so business teams can create apps on top of them without any developer in the loop.
Power Automate flows that need complex server-side logic
When the standard connector can't do a multi-step lookup or a calculation, we build a custom action that handles it server-side and returns a clean result.
Common Questions
Ready to Get Started?
No sales pitch, no long contracts. Just a free call to understand what you need and whether we're the right fit.
Book a Free Consultation