Slack’s API-era integrations didn’t appear out of nowhere. In 1995–1998, CGI scripts, HTML forms, early JavaScript, and intranet dashboards established the core patterns—requests, responses, automation triggers, and human-in-the-loop workflows—that later became familiar in Slack apps and webhooks.
Twilio arrived much later, but the API patterns it popularized—parameterized requests, server-side endpoints, and callback-driven workflows—were prototyped on the early web via CGI scripts, HTML forms, and browser scripting between 1995 and 1998.
Stripe feels modern, but its developer-first approach has deep roots in 1995–1998: HTML forms, CGI scripts, early JavaScript, and the first mainstream patterns for integrating dynamic services on the web.
From CGI scripts and HTML forms to early JavaScript and server callbacks, 1995–1998 quietly introduced the integration patterns that later evolved into modern webhooks.
Slack’s API feels modern, but its core ideas—URLs as interfaces, stateless requests, simple payloads, and predictable responses—trace back to the Web’s earliest HTTP experiments from 1990 to 1994.
From the earliest HTTP requests to CGI-driven endpoints, the Web’s 1990–1994 interface ideas quietly shaped the patterns that power today’s GitHub API automation—webhooks, CI triggers, and machine-to-machine workflows.
Long before “webhooks” became a common term, the early Web (1990–1994) introduced patterns—HTTP endpoints, CGI scripts, gateways, and server-generated callbacks—that made event-driven integration possible.