Gateway

Gateway is an open-source server that lets businesses handle AI agents over HTTP for services, prices, booking and messaging.

Gateway is an open-source server that lets a business deal with AI agents directly over HTTP. Agents find the server through llms.txt, look up services and prices, manage bookings, and leave messages for the owner. The software features a modular architecture with connectors for Google Calendar, Square Appointments, experimental GlossGenius, Twilio SMS, and Slack. A built-in setup wizard helps configure the server and connect your accounts. It runs on Node.js and requires macOS, Linux, or Windows via WSL.

Gateway at a glance

Best for: Founder
Runs on: macOS, Windows, Linux, API, self-hosted, open source
Pricing: Free
Released: October 2026
Category: AI agent tool
Website: github.com/mudroom-ai/gateway

Key features

Exposes an HTTP API with OpenAPI specification
Supports agent discovery via llms.txt
Handles service booking, cancellation, and rescheduling
Integrates with Google Calendar and Square Appointments
Sends owner notifications and two-way Slack communication
Includes an interactive setup wizard

Use it for

Allow AI agents to check service slots and prices
Enable automated agent booking and rescheduling
Receive agent messages and owner replies through Slack
Send SMS booking notices to merchants via Twilio

Alternatives to Gateway

OpenBot — Runs entirely on your own infrastructure with strict document permissions and custom.
BrowserOS — Runs entirely locally and lets AI agents use real user logins to complete tasks.
Hermes Agent — It features persistent memory, self-created skills, and isolated sandboxing.
WebBrain — Runs locally or in the cloud with your choice of LLM and zero telemetry.
FastGPT — It uses hybrid retrieval and auto-cleansed data to prevent hallucinations.
Activepieces — Unifies AI agents, chat, flows, tables, and 760+ apps with open-source core and self-hosting options.
53AI Hub — Aggregates AI agents from multiple platforms into one operational portal.
Sierra — Enterprise support agents with outcome-based pricing
Open Interface — It uses visual screenshots to self-correct its actions while navigating GUIs.
ARBR — Unifies routing, budgets, and governance behind one OpenAI-compatible endpoint.
AionUi — Auto-detects and runs local CLI agents like Claude Code and Codex in parallel.
Keiki — Deploy one AI agent across multiple messaging channels with built-in tools and memory.

All Gateway alternatives