Telzio MCP by usefulapi MCP Server

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answering

Telzio MCP by usefulapi is answering right now. Last checked 13 min ago. It exposes 14 tools. Last commit 11 Nov 2026.

Read calls, queues and users; hang up or transfer live calls and send SMS in Telzio.

Uptime history 18 hours of history

18 hours agonow

100.0%

Uptime 24h

65 of 65 checks

Tools

read from the server

259 ms

Response time

average over 24h

Stars

last commit 11 Nov 2026

Nothing serious here today

Today is the operative word: we check Telzio MCP by usefulapi every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 13 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add telzio --transport http https://telzio.usefulapi.io/mcp

Settings → Connectors → Add custom connector, then paste this address

https://telzio.usefulapi.io/mcp

~/.codex/config.toml

[mcp_servers.telzio]
url = "https://telzio.usefulapi.io/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "telzio": {
      "url": "https://telzio.usefulapi.io/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "telzio": {
      "type": "http",
      "url": "https://telzio.usefulapi.io/mcp"
    }
  }
}

Available tools 14

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

telzio

telzio_get_account_balance

Get the current Telzio account balance in USD. Telzio API: GET /account/balance.

telzio_get_call

Get one call with its legs, price, hang-up causes, spam score and event timeline. Telzio API: GET /calls/details/{CallUUID}.

telzio_get_queue

Get one call queue with its agents, their current status and the callers now waiting. Telzio API: GET /queue/{QueueId}/view.

telzio_hang_up_call

Hang up a live call now. This ends the call for everyone on it. Telzio API: POST /calls/{CallUUID}/hangup.

telzio_list_blacklist

List the numbers on the account's blacklist (blocked callers). Telzio API: GET /blacklist.

telzio_list_call_flows

List all call flows on the account. Telzio API: GET /flows.

telzio_list_call_log

List calls from the call log, newest first. Returns at most MaxResults calls per page (default 20); use Offset to page. Telzio API: GET /calls/log.

telzio_list_live_calls

List the calls in progress now, with their CallUUIDs. Telzio API: GET /calls/live.

telzio_list_numbers

List the phone numbers on the account (NumberID and E.164). Telzio API: GET /numbers.

telzio_list_queues

List all call queues on the account (QueueId and QueueName). Telzio API: GET /queue/all.

telzio_list_user_groups

List all user groups on the account. Telzio API: GET /groups.

telzio_list_users

List all users on the account with their extension, number, admin flag, groups and call-recording setting. Telzio API: GET /users.

telzio_send_sms

Send one SMS from a Telzio number to one recipient. Use only for the account's own direct messages: no bulk or unsolicited sends. Each call sends a new message. Telzio API: POST /sms/send.

telzio_transfer_call

Transfer a live call to another user, extension or external number. Telzio API: POST /calls/{CallUUID}/transfer.

Endpoints

URL	Transport	State	Latency	Checked
https://telzio.usefulapi.io/mcp	streamable-http	answering	219 ms	13 min ago

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Telzio MCP by usefulapi — questions

Answers built from our own checks of this server.

What can Telzio MCP by usefulapi do?

It exposes 14 tools, read directly from the server on our last check. Among them: telzio_get_account_balance, telzio_get_call, telzio_get_queue, telzio_hang_up_call, telzio_list_blacklist, telzio_list_call_flows and 8 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Telzio MCP by usefulapi working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 65 of 65 checks got a reply (100.0%), average response time 259 ms. The bar chart above shows every period we have measured.

How do I connect Telzio MCP by usefulapi?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Telzio MCP by usefulapi need an API key?

No. Telzio MCP by usefulapi completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 14 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Telzio MCP by usefulapi?

It answers our handshake in 259 ms on average, which is faster than 52% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Telzio MCP by usefulapi open source?

The code is open source: it is published under the MIT licence, written in JavaScript, 1 stars on GitHub and 1 open issue. The licence covers the code in the repository, not the hosted service at telzio.usefulapi.io, which runs on its operator's own terms.