MCP HeartbeatTHE MCP OBSERVATORY
Public workspace

Explore

Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

MCP server · Communication & messaging

Telzio MCP by usefulapi

By usefulapi.io Verified namespace

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

WebsiteSource codeCommunication & social
Connect to Telzio MCP by usefulapi
Checks passed
14 / 22

0 failed · 8 not measured

Median response
63 ms

Median of successful probes over 7 days

30-day uptime
Not measured

Share of countable probes over 30 days, including daily rollups. Auth challenges are excluded.

Discovered tools
14

Tool definitions returned by this server

Independent monitoring

Health & checks

Status history

Outdated check

Last connection measurement is over 24 hours old. Current availability is unknown.

Last checked
Check summary by test group
Test areaPassedFailedUnmeasured
ConnectionCan a client connect and discover tools?
500
Reliability & speedDoes it respond consistently and quickly?
004
Access & authenticationWhat is required to use this server?
102
Tool qualityAre the tool definitions usable by an agent?
400
Publisher identityCan the publisher be traced to its source?
402

Unmeasured means there is not enough evidence to decide. How these checks work

Inspect individual checks 22 recorded

Core

  • Pass
    Reachable

    Latest probe returned HTTP 200 in 63 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-11-25, serverInfo.name telzio-mcp.

  • Pass
    Lists tools

    tools/list returned 14 tools.

  • Pass
    Current protocol

    Negotiated 2025-11-25. The bar is 2025-06-18 or newer.

  • Pass
    HTTPS

    The endpoint URL is https.

Performance

  • Not measured
    Fast (p50)

    Median latency 63 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 63 ms over 1 samples in 7 days. The bar is 3000 ms. Need at least 20 samples.

  • Not measured
    Reliable (uptime)

    1 of 1 attempts returned a tool list in 30 days (100%). The bar is 99%. Need at least 30 samples.

  • Not measured
    Stable tool list

    Fewer than two successful probes in 30 days, so tool-list stability is not measured.

Access

  • Pass
    Open access

    tools/list succeeded with no credential, and the record declares none.

  • Not measured
    Standard auth

    Auth is not required, so the OAuth metadata check does not apply.

  • Not measured
    Free tier cited

    No publisher quote has been checked.

Tools

  • Pass
    Tools described

    Every tool description is at least 20 characters.

  • Pass
    Valid input schemas

    Every inputSchema is a JSON Schema object.

  • Pass
    Parameters documented

    18 of 18 parameters have a description (100%). The bar is 80%.

  • Pass
    Safety hints

    Every tool sets readOnlyHint or destructiveHint.

Publisher

  • Pass
    Verified namespace

    Listed in the Official MCP Registry.

  • Pass
    Website matches publisher

    The website host matches the reverse-domain namespace.

  • Pass
    Source repo linked

    A repository URL is on file.

  • Not measured
    Repo owner matches

    This namespace is not an io.github login, so the owner comparison does not apply.

  • Pass
    Recently updated

    Updated 2026-11-10T23:35:26.436351Z, within 180 days.

  • Not measured
    Open-source licence

    The GitHub licence lookup has not returned an OSI result yet.

Start using Telzio MCP by usefulapi

Connect to this server

Choose your client, copy the configuration, then enable the server in your client’s MCP settings.

Run this command in your terminal, then restart Claude Code.

Claude Code

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

Capabilities

Tools 14

telzio_get_account_balance

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

Discovered
telzio_get_call

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

Discovered
telzio_get_queue

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

Discovered
telzio_hang_up_call

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

Discovered
telzio_list_blacklist

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

Discovered
telzio_list_call_flows

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

Discovered
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.

Discovered
telzio_list_live_calls

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

Discovered
telzio_list_numbers

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

Discovered
telzio_list_queues

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

Discovered
telzio_list_user_groups

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

Discovered
telzio_list_users

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

Discovered
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.

Discovered
telzio_transfer_call

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

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected63 ms14

Related servers

All alternatives

Same function and industry, ranked by checks passed then median latency.

Explore alternatives to Telzio MCP by usefulapi