---
title: "API Request / Call"
url: "https://docs.unified.to/concepts/glossary/api_request_call"
description: "Unified.to documentation"
generated_at: "2026-05-21T18:12:26.874Z"
---
# Glossary: API Request / Call[Glossary](/concepts/glossary)

An **API request** — also known as an **API call** — is a message sent by a client application to an API to retrieve, update, or interact with the resources provided by the API. The request is typically made over HTTP or HTTPS and follows a predefined format and protocol. APIs (Application Programming Interfaces) enable communication between different software systems by exposing endpoints that the client can interact with.