API (Application Programming Interface)
3 min read
Definition
An API (Application Programming Interface) is a set of rules and protocols that allows different software applications to communicate with each other. It defines the methods and data formats that programs can use to request and exchange information.
How APIs Work
Think of an API as a waiter in a restaurant. You (the client) make a request from the menu (API documentation), the waiter carries it to the kitchen (the server), and brings back the dish (the response).
Client → Request → API Endpoint → Server → Response → Client
Most modern APIs use REST (Representational State Transfer) architecture with JSON data format, though GraphQL and gRPC are growing alternatives.
Why It Matters for Forms and Surveys
Form builders with robust APIs let you:
- Programmatically create forms: generate forms on the fly based on your application logic.
- Retrieve submissions: pull form responses into your own database, CRM, or analytics pipeline.
- Prefill fields: pass user data via URL parameters or API calls to reduce friction.
- Integrate with any tool: connect forms to Slack, email, spreadsheets, or custom workflows.
Common HTTP Methods
| Method | Purpose |
|---|---|
| GET | Retrieve data (e.g., fetch form submissions) |
| POST | Create new data (e.g., submit a form response) |
| PUT / PATCH | Update existing data (e.g., edit a form field) |
| DELETE | Remove data (e.g., delete a submission) |
Related Terms