# Callchatsyn MCP server

Source: https://glimind.com/server/mcp-registry%2Fcom.callchatsyn%2Fcallchatsyn
Registry id: `mcp-registry/com.callchatsyn/callchatsyn`
Status: live (checked 2026-10-27T04:28:40.897Z)

## Verdict

Callchatsyn MCP server answered 100% of Glimind's liveness checks over 30 days, better than 42% of MCP servers, with 891 ms median handshake and 0 outages in 90 days. Its agent-readiness grade is A (96/100) across 4 tools, costing an agent about 1,132 tokens to load. Checked every few minutes; no tool is ever called.

## Measurements (30 days)

| Metric | Value | Better than |
|---|---|---|
| Uptime, 30 days | 100% | 42% of MCP servers |
| Median handshake latency | 891 ms | 23% of MCP servers |
| p95 handshake latency | 3254 ms | — |
| Checks in 30 days | 3,887 | — |
| Outages, 90 days | 0 | — |
| Median recovery | — | — |
| Agent-readiness score | 96/100 (A) | 82% of MCP servers |
| Tools | 4 | — |
| Tool-list size for an agent | ~1,132 tokens | 70% of MCP servers |
| Days observed | 20 | — |

## Install

```json
{
  "mcpServers": {
    "callchatsyn-mcp-server": {
      "type": "http",
      "url": "https://callchatsyn.com/api/mcp"
    }
  }
}
```

Claude Code:

```sh
claude mcp add --transport http callchatsyn-mcp-server https://callchatsyn.com/api/mcp
```

## Tools (4)

- `answer_customer_question`: Answer a customer's message for one small business using only that business's own FAQs and order records. Rule-based, not generated, so it never invents prices 
- `book_appointment`: Book one appointment for a customer. This creates a real booking: the business is notified, and if it has connected Cal.com the booking is created there too. Wi
- `cancel_appointment`: Cancel one of the business's bookings by the 'id' that book_appointment returned. This changes data: the time becomes free again, and if the business has connec
- `list_open_times`: List the business's next open appointment times: up to 5, soonest first, within the next 7 days, labelled in the business's time zone, plus its services and loc

Measured by Glimind (https://glimind.com): MCP handshake + tool list only, no tool is ever called. CC BY 4.0.