Build on HAL. Or let your AI agent do it.

A REST API, signed webhooks, a JavaScript API in the widget, native mobile SDKs and a hosted MCP server with more than 130 tools. Wire HAL into your product, or hand it to Claude, Cursor or your own agent.

Start free Read the docs

Your MCP client

hal · get_conversationLena Fischer · “Do you offer private sessions for beginners?”

hal · find_relevant_articlesPrivate sessions · 60 min · €45

hal · reply_to_conversationReply sent to Lena

Done. I answered Lena from the Private sessions article.

# Webhook from HAL
POST /hooks/hal  200 OK
X-HAL-Signature: t=1793452800,v1=9f2c…e41a

{
  "event": "message.created",
  "conversation_id": "conv_8x2k…",
  "sender": "agent",
  "content": "Yes! Private sessions are 60 minutes…"
}

app.chatwithhal.com/inbox

LFLena FischerSnoozeClose

Do you offer private sessions for beginners?08:31

Agent is typing…

Yes! Private sessions are 60 minutes, one-to-one with a teacher, and a good way to start. They cost €45 and you can book online.via MCP · 08:33

Demo data · Harbor Yoga Studio is not a real customer

MCP

MCP: HAL as a tool for AI agents.

Connect the hosted MCP endpoint to Claude, Cursor or any MCP client. Agents can read and answer conversations, update the CRM, write articles, build workflows and broadcasts, and import history from other tools. Give each agent a key for one project, with only the permissions it needs.

Account key or per-project keys, hosted over HTTP
Conversations, CRM and deals, articles, tours, workflows and email
Import conversation history through MCP, without notifying anyone

REST and webhooks

APIs for everything else.

Use the REST API to manage contacts, companies, deals and conversations, push events from your server and get webhooks when things change. The incoming message API turns your own forms into conversations.

REST API v1 with API keys
22 webhook events, signed, with retries
Incoming message API for lead forms

Plays well with your stack.

JavaScript API: identify(), track(), set(), setStage(), setDeal(), trigger() and showGuide() in the widget.
Identity verification: Sign identify() calls with HMAC so nobody can pose as a user.
Content API: Release and promote help content from your own repo or docs pipeline.
iOS and Android SDKs: Native chat for your app: Swift Package Manager (iOS 15+) and JitPack (Android 7+).
Incoming message API: Send form submissions into the inbox as conversations, on every plan.
OAuth apps: Let a partner app install the widget into a customer's project.

Better together

The same data, from your code.

IntegrationsSlack, Google Calendar and the other ready-made connections.Learn more → CRM & pipelineContacts, companies and deals your code keeps current.Learn more → Live chat widgetThe widget your JavaScript talks to.Learn more →

Pricing

Which plans include this

Feature	Free€0	Starter€29/mo	Pro€89/mo	Business€229/mo
JavaScript widget API and mobile SDKs	Included	Included	Included	Included
Webhooks	Included	Included	Included	Included
Incoming message API	Included	Included	Included	Included
REST API, MCP server and Content API	—	Included	Included	Included

Prices in EUR, excluding VAT. Pay yearly and get two months free. Compare all plans and add-ons

Put HAL on your site today.

Install the widget in five minutes, point HAL at your help content, and let the AI take the first pass at every question.

Start free See pricing

Free plan · No credit card · Hosted in the EU