A website, mobile app and admin panel need clear rules for exchanging shared information. An API organizes this communication. Before requesting development, describe the customer action and the result the responsible employee should see.

Start with one complete workflow

For example, a customer creates an order in the app, an employee reviews it in the dashboard and the customer sees the updated status. Define required fields, who may change the status and what happens if the connection fails while saving.

Many web integrations use HTTP requests and server responses. MDN explains the HTTP model.

Establish responsibility for data

Identify the authoritative source for each record and the rules for updates. Product information might be maintained in the dashboard while customers create orders in the app. Specify how updates appear, which functions work offline and how repeated submissions are handled.

Area Scope to agree
Accounts Registration, authentication and roles
Orders Creation, editing and state transitions
Files Types, sizes and download permissions
Notifications Trigger and intended recipient
External services Documentation and test access

Define the handover

Request documentation for the agreed operations, fields, successful responses, error cases and testing steps. Review permissions, retries and connection failures for the affected workflows. A separate test environment supports checks using suitable sample data.

Zawid Accounts is a portfolio example combining a mobile app, website and admin panel, with local phone features and website-managed functions.

Prepare an estimate brief

Effort depends on workflow rules, existing API documentation, data migration, external services and testing scope. List the current systems and agree on an initial end-to-end delivery. Explore custom software development and send the workflow, available systems and preferred timeline to discuss the next step.