Callingly vs Telephony MCP Server
A side-by-side look at the Callingly and Telephony MCP Server MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
C
CallinglyCommunication · Remote HTTP/SSELets AI agents get leads on the phone: call, send SMS, and schedule callbacks for sales teams.43FairAuth: oauth 2.0Verdict: choose Callingly for communication work over a hosted endpoint; choose Telephony MCP Server for communication over a hosted endpoint. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
CChoose Callingly when
- You need dedicated capabilities in the Communication domain.
- You prefer a remote HTTP/SSE transport.
- Its auth model fits you: OAuth 2.0.
Choose Telephony MCP Server when
- You need dedicated capabilities in the Communication domain.
- You prefer a remote HTTP/SSE transport.
- You have the keys it needs:
VONAGE_API_KEY, VONAGE_API_SECRET, VONAGE_APPLICATION_ID, VONAGE_PRIVATE_KEY_PATH, VONAGE_LVN, VONAGE_API_URL, VONAGE_SMS_URL, CALLBACK_SERVER_URL.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | C Callingly | |
|---|---|---|
| Category | Communication | Communication |
| Quality signal | 43/100 · Fair | 48/100 · Fair |
| Install command | Confirmed | Confirmed |
| Transport | Remote HTTP/SSE | Remote HTTP/SSE |
| Auth | OAuth 2.0 | Not declared |
| Pricing | Not declared | Not declared |
| Required env vars | None listed | VONAGE_API_KEYVONAGE_API_SECRETVONAGE_APPLICATION_IDVONAGE_PRIVATE_KEY_PATHVONAGE_LVNVONAGE_API_URLVONAGE_SMS_URLCALLBACK_SERVER_URL |
| Verified owner | Community listing | Community listing |
| GitHub stars | — | 14 |
| Directory activity | 2 views 0 installs 0 upvotes | 1 views 0 installs 0 upvotes |
| Tools | Not listed | Not listed |
| Full listing | View Callingly | View Telephony MCP Server |
Tools & capabilities
Callingly tools
No tool names declared yet. Check the project README from the listing page.
Telephony MCP Server tools
No tool names declared yet. Check the project README from the listing page.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Callingly
{
"mcpServers": {
"callingly": {
"url": "https://callingly.com/features/mcp/"
}
}
}
Telephony MCP Server
{
"mcpServers": {
"khan2a-telephony-mcp-server": {
"url": "https://api.nexmo.com/v1/calls"
}
}
}
Frequently asked questions
Callingly is categorized under Communication and uses a remote HTTP/SSE transport. Telephony MCP Server belongs to Communication and uses a remote HTTP/SSE transport. Pick Callingly for communication work and Telephony MCP Server for communication.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
Callingly has no declared pricing — check the project's own site. Auth: oauth 2.0. Telephony MCP Server has no declared pricing — check the project's own site. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add callingly and khan2a-telephony-mcp-server as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Callingly has a quality signal of 43/100 (Fair) with 2 views, 0 installs and 0 GitHub stars. Telephony MCP Server has 48/100 (Fair) with 1 views, 0 installs and 14 GitHub stars.