Clearstream MCP by usefulapi MCP Server

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answering

Clearstream MCP by usefulapi is answering right now. Last checked 3 min ago. It exposes 15 tools. Last commit 8 Nov 2026.

Read lists, subscribers, tags and texts; send texts and change subscribers in Clearstream.

Uptime history 13 hours of history

13 hours agonow

100.0%

Uptime 24h

45 of 45 checks

Tools

read from the server

255 ms

Response time

average over 24h

Stars

last commit 8 Nov 2026

Nothing serious here today

Today is the operative word: we check Clearstream 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 3 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

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

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

https://clearstream.usefulapi.io/mcp

~/.codex/config.toml

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

.cursor/mcp.json

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

.vscode/mcp.json

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

Available tools 15

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

clearstream

clearstream_add_subscriber

Create or add one subscriber, with optional lists and tags. By default the subscriber must confirm opt-in by text. The customer must hold explicit written consent from every recipient before you use this tool (Clearstream terms, section 4G). Clearstream API: POST /v1/subscribers.

clearstream_add_subscriber_to_list

Add one mobile number to a subscriber list. Locked lists cannot change. The customer must hold explicit written consent from every recipient before you use this tool (Clearstream terms, section 4G). Clearstream API: POST /v1/lists/{id}/subscribers.

clearstream_get_account

Get the Clearstream account behind the API key: name, plan and settings. Good first call to confirm which account is connected. Clearstream API: GET /v1/account.

clearstream_get_list

Get one subscriber list: name, subscriber count, active texting subscriber count and sync status. Clearstream API: GET /v1/lists/{id}.

clearstream_get_subscriber

Get one subscriber by mobile number: name, opt-in status, lists and tags. Clearstream API: GET /v1/subscribers/{number}.

clearstream_get_text_stats

Get text volume statistics for a date range (YYYY-MM-DD, inclusive). Clearstream API: GET /v1/stats/texts.

clearstream_list_lists

List the subscriber lists (groups) in the account, with subscriber counts. Filter by name or locked state. Clearstream API: GET /v1/lists.

clearstream_list_numbers

List the shortcodes and longcodes this account can send texts from, and which one is the default. Clearstream API: GET /v1/numbers.

clearstream_list_subscribers

Search the account's subscribers by name or mobile number. Clearstream API: GET /v1/subscribers.

clearstream_list_subscribers_of_list

List the subscribers in one list, with optional name filters. Clearstream API: GET /v1/lists/{id}/subscribers.

clearstream_list_tags

List the subscriber tags in the account. Clearstream API: GET /v1/tags.

clearstream_list_texts

List texts in the account's inbox history, incoming or outgoing, optionally for one number. Use the cursor from a previous reply for the next page. Clearstream API: GET /v1/texts.

clearstream_remove_subscriber_from_list

Remove one mobile number from a subscriber list. The subscriber's opt-in status does not change. Locked lists cannot change. Clearstream API: DELETE /v1/lists/{id}/subscribers/{number}.

clearstream_send_text

Send one SMS to one or more numbers. This sends real messages to real phones and cannot be undone. The customer must hold explicit written consent from every recipient before you use this tool (Clearstream terms, section 4G). Opted-out numbers are skipped (for a list of numbers) or cause an error (for one number). Clearstream API: POST /v1/texts.

clearstream_tag_subscribers

Add a tag to up to 100 subscribers by mobile number. The customer must hold explicit written consent from every recipient before you use this tool (Clearstream terms, section 4G). Clearstream API: POST /v1/tags/{id}/subscribers.

Endpoints

URL	Transport	State	Latency	Checked
https://clearstream.usefulapi.io/mcp	streamable-http	answering	297 ms	3 min ago

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Clearstream MCP by usefulapi — questions

Answers built from our own checks of this server.

What can Clearstream MCP by usefulapi do?

It exposes 15 tools, read directly from the server on our last check. Among them: clearstream_add_subscriber, clearstream_add_subscriber_to_list, clearstream_get_account, clearstream_get_list, clearstream_get_subscriber, clearstream_get_text_stats and 9 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 Clearstream MCP by usefulapi working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 45 of 45 checks got a reply (100.0%), average response time 255 ms. The bar chart above shows every period we have measured.

How do I connect Clearstream 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 Clearstream MCP by usefulapi need an API key?

No. Clearstream MCP by usefulapi completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 15 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Clearstream MCP by usefulapi?

It answers our handshake in 255 ms on average, which is faster than 54% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Clearstream 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 clearstream.usefulapi.io, which runs on its operator's own terms.