How do I install CallChatSyn?

Copy the http config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does CallChatSyn need an API key?

No required environment variable is listed on this record.

What transport does CallChatSyn use?

CallChatSyn is reached over HTTP.

When was CallChatSyn last checked?

Last checked 2026-11-08. Answer small-business customer questions from FAQs, list open appointment times, and book them.

CallChatSyn MCP server

Power your agent

Add this server

The publisher's own URL. Not a PlugMCP endpoint.

Add to Cursor Add in Claude Add to VS Code Run on PlugMCP

Host a copy with our keys and logs.

Server URL

https://callchatsyn.com/api/mcp

The Claude button above opens Claude with the name and URL filled in. You still confirm it there.

shClaude Code

1claude mcp add --transport http com.callchatsyn-callchatsyn https://callchatsyn.com/api/mcp

Run in a terminal.

jsonClaude Desktop

1{2  "mcpServers": {3    "com.callchatsyn-callchatsyn": {4      "command": "npx",5      "args": [6        "-y",7        "mcp-remote",8        "https://callchatsyn.com/api/mcp"9      ]10    }11  }12}

claude_desktop_config.json

Remote · HTTPPublisher installStep-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

Run on PlugMCP

Host a copy with our keys and logs.

A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.

Launch

Server facts

Remote

Transport: http
Version: 0.1.0
Last checked

Tools

No tool list yet. Remote servers get one after the first health check.

FAQ

Questions

CallChatSyn MCP server

Let an AI assistant (Claude, Cursor, any MCP client) answer customer questions and book appointments for a small business, using that business's own FAQs and opening hours on CallChatSyn.

Free for the first 1,000 businesses (founder offer: 100 API calls a day, 2,000 a month).

Tools

Tool	Changes data?	What it does
`answer_customer_question`	No (read-only)	Answers from the business's FAQs and order data (English/Chinese); flags booking and "talk to a person" requests
`list_open_times`	No (read-only)	Next open times (up to 5, next 7 days) in the business's time zone, plus services and locations; from CallChatSyn hours or the business's connected Cal.com
`book_appointment`	Yes, creates a booking	Books one of those times and returns its `id`; the business is notified and, with Cal.com connected, the booking is created there. Not idempotent. Demo key = dry run
`cancel_appointment`	Yes, cancels a booking	Cancels a booking by `id` (also in Cal.com if connected). To reschedule: cancel, then book a new time. Demo key = dry run

Remote server (nothing to install)

Add this URL as a custom connector (Claude: Settings → Connectors → Add custom connector; Cursor and others: a Streamable HTTP server):

https://callchatsyn.com/api/mcp

Without a key it uses the demo business. To act for your own business, send the header Authorization: Bearer ccs_live_.... Also listed in the official MCP Registry as com.callchatsyn/callchatsyn.

Local setup (npx)

Create a CallChatSyn account, add FAQs and opening hours, then Dashboard → Developers → claim founder access → create an API key.

Add to your MCP client config:

{ "mcpServers": { "callchatsyn": { "command": "npx", "args": ["-y", "github:oneappsworld/callchatsyn-mcp"], "env": { "CALLCHATSYN_API_KEY": "ccs_live_..." } } } }

Keep the key private; it acts for one business.

No key yet? Leave CALLCHATSYN_API_KEY out and the server uses the public demo key (ccs_demo_public): answers come from a demo business and bookings are dry runs, so you can try every tool before signing up.

Notes

Answers are rule-based FAQ matching (fast, predictable), not free-form generation.

API docs and OpenAPI spec: https://callchatsyn.com/developers · https://callchatsyn.com/openapi.json

MIT licensed.

Add this server

Host a copy with our keys and logs.

Server facts

Tools

Questions

How do I install CallChatSyn?

Does CallChatSyn need an API key?

What transport does CallChatSyn use?

When was CallChatSyn last checked?

Documentation