Clearstream MCP by usefulapi

io.usefulapiPublished by usefulapi.ioOfficial publisherv1.0.1Updated Nov 7, 2026

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

The publisher's own server: Ably MCP by usefulapi

VerifiedStreamable HTTPWeb executableCommunication & CollaborationBusiness & Commerce

Overview

AI-generated overview

Hosted Clearstream MCP server that lets an assistant read SMS lists, subscribers, tags and text history, and send texts or change subscribers.

What you can do
  • Inspect the account, sending numbers, lists, tags and text statistics
  • Search and read subscribers, including opt-in status, lists and tags
  • Browse inbox history of incoming and outgoing texts with paging
  • Send an SMS to one or more numbers
  • Add subscribers, add or remove numbers from lists, and tag up to 100 subscribers
  • Check usage, request a feature, and upgrade or cancel a paid plan
When to use it
Useful when you work with Clearstream for SMS outreach and want an assistant to answer questions about lists, subscribers and text volume, or to carry out consented subscriber changes and sends without opening the Clearstream dashboard.
Requirements
Remote endpoint over streamable HTTP; no local install. Sign-in uses OAuth, and the login page asks for a Clearstream API key created in your Clearstream account, plus an Account ID for a subaccount key. The key is stored per user by the server; no keys go in client config. A free tier allows 50 tool calls per month.
Before you install
Sending texts and changing subscribers are real, irreversible actions on real phones; the server asks for confirmation and requires written consent from every recipient. The login page collects a Clearstream API key, which the hosted service stores per user. Paid plans cost $9/month or $90/year (Pro) and $39/month or $390/year (Pro+), billed through a Stripe checkout link; cancellation has no refund for the current period.

Installation

In SourceWeft

  1. Open Clearstream MCP by usefulapi in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.usefulapi%2Fclearstream/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "clearstream-by-usefulapi": {
      "type": "http",
      "url": "https://clearstream.usefulapi.io/mcp"
    }
  }
}

README

Clearstream MCP by usefulapi

Use your Clearstream account from Claude, Cursor, or any MCP client. It reads lists, subscribers, texts and statistics, and sends texts or changes subscribers only with written consent. Hosted, no local install: connect with your own credentials.

Live endpoint: https://clearstream.usefulapi.io/mcp · Homepage: https://usefulapi.io

Connect

  • Claude (claude.ai, Desktop): open Customize → Connectors, click + Add → Add custom connector, and paste https://clearstream.usefulapi.io/mcp.
  • Claude Code: claude mcp add --transport http clearstream https://clearstream.usefulapi.io/mcp, then run /mcp to log in.
  • VS Code: Add to VS Code.
  • Cursor and other clients: add the URL as a remote MCP server:
json
{  "mcpServers": {    "clearstream": {      "url": "https://clearstream.usefulapi.io/mcp"    }  }}

Add only the URL. Do not add an Authorization header or an API key to the client config: the server signs you in with OAuth, and the login page asks for your Clearstream credentials.

Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/clearstream/

On first connect you provide your Clearstream API key, created inside your Clearstream account, and, for a subaccount key only, the Account ID. The server validates it and stores it per user. No keys go in config files.

Tools

ToolTypeWhat it does
clearstream_get_accountreadGet account
clearstream_list_numbersreadList sending numbers
clearstream_list_listsreadList lists
clearstream_get_listreadGet a list
clearstream_list_subscribers_of_listreadList subscribers in a list
clearstream_list_subscribersreadList subscribers
clearstream_get_subscriberreadGet a subscriber
clearstream_list_tagsreadList tags
clearstream_list_textsreadList texts
clearstream_get_text_statsreadGet text statistics
clearstream_send_textwriteSend a text
clearstream_add_subscriberwriteAdd a subscriber
clearstream_add_subscriber_to_listwriteAdd a subscriber to a list
clearstream_remove_subscriber_from_listwriteRemove a subscriber from a list
clearstream_tag_subscriberswriteTag subscribers
clearstream_usage_statusmetaUsage status (free-tier meter)
clearstream_request_featuremetaRequest a missing feature
clearstream_upgrademetaUpgrade to Pro or Pro+
clearstream_cancel_subscriptionmetaCancel the Pro subscription

read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage, manage your subscription or send a feature request.

Pricing

PlanPriceLimit
Free$050 tool calls / month
Pro (per user)$9/mo or $90/yr (2 months free)Unlimited*

*Pro has a fair use limit of 10,000 tool calls a month on this server. For more, write to [email protected].

Pro covers this server only. Subscribe with clearstream_upgrade (it returns a Stripe Checkout link). Cancel any time with clearstream_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running clearstream_upgrade before then undoes the cancel. Or write to [email protected].

License

MIT — see LICENSE. Documentation only; the server is hosted.

Source: servers/clearstream/README.md at commit 2450437

Tools

15

clearstream_get_account

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.

Takes no parameters.

clearstream_list_numbers

List sending numbers

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

Takes no parameters.

clearstream_list_lists

List lists

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

Parametersnamepagelimitlocked

clearstream_get_list

Get a list

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

Parameterslist_idrequired

clearstream_list_subscribers_of_list

List subscribers in a list

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

Parameterspagefirstlimitlist_idrequiredfull_name

clearstream_list_subscribers

List subscribers

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

Parameterslastpagefirstlimitfull_namemobile_number

clearstream_get_subscriber

Get a subscriber

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

Parametersmobile_numberrequired

clearstream_list_tags

List tags

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

Takes no parameters.

clearstream_list_texts

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.

Parameterslimitcursordirectionmobile_number

clearstream_get_text_stats

Get text statistics

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

Parametersendrequiredstartrequiredtimezone

clearstream_send_text

Send a 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.

Parameterstorequiredfrommedia_urltext_bodyrequiredtext_headeruse_default_header

clearstream_add_subscriber

Add a 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.

Parameterslasttagsemailfirstlistsdouble_optinmobile_numberrequired

clearstream_add_subscriber_to_list

Add a subscriber to a 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.

Parameterslist_idrequiredmobile_numberrequired

clearstream_remove_subscriber_from_list

Remove a subscriber from a 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}.

Parameterslist_idrequiredmobile_numberrequired

clearstream_tag_subscribers

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.

Parameterstag_idrequiredmobile_numbersrequired

Version history

1
  1. v1.0.1LatestNov 7, 2026

Score

100% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

Other Usefulapi integrations

Ably MCP by usefulapi

io.usefulapiOfficial publisher

Ably MCP by usefulapi's hosted MCP server, published by usefulapi.io; no sign-in required; Streamable HTTP; 15 tools.

Streamable HTTPWeb executable
Communication & Collaboration15 toolsNov 7, 2026

Woffu MCP by usefulapi

io.usefulapiOfficial publisher

Woffu MCP by usefulapi's hosted MCP server, published by usefulapi.io; no sign-in required; Streamable HTTP; 5 tools.

Streamable HTTPWeb executable
5 toolsNov 7, 2026

White Label Loyalty MCP by usefulapi

io.usefulapiOfficial publisher

White Label Loyalty MCP by usefulapi's hosted MCP server, published by usefulapi.io; no sign-in required; Streamable HTTP; 5 tools.

Streamable HTTPWeb executable
5 toolsNov 7, 2026

Weekdone MCP by usefulapi

io.usefulapiOfficial publisher

Weekdone MCP by usefulapi's hosted MCP server, published by usefulapi.io; no sign-in required; Streamable HTTP; 15 tools.

Streamable HTTPWeb executable
15 toolsNov 7, 2026

WebinarKit MCP by usefulapi

io.usefulapiOfficial publisher

WebinarKit MCP by usefulapi's hosted MCP server, published by usefulapi.io; no sign-in required; Streamable HTTP; 5 tools.

Streamable HTTPWeb executable
5 toolsNov 7, 2026