usefulapiVoodoo SMS MCP server
Read Voodoo SMS credits, reports, inbox and lists; send one SMS; manage the opt-out blacklist. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
What can I ask?
Turn on the Voodoo SMS connector, then ask in plain words. The AI picks the tools.
- How many SMS credits do I have left on my account today?
- Show delivery reports for the texts I sent recently.
- Which phone numbers are currently on my opt-out blacklist?
- What replies have come into my inbox this week?
What you can do with Voodoo SMS in Claude and ChatGPT
For businesses that send text messages with Voodoo SMS.
Check how many SMS credits are left
The AI reads the credit balance of the account. One credit pays for one SMS part.
Check if sent texts were delivered
The AI lists delivery reports with recipient, sent and delivered time, price and status, optionally filtered by date.
Read the replies that came into your inbox
The AI lists SMS received on your virtual mobile numbers, such as replies and keyword messages, and shows your numbers.
Send an SMS or cancel a scheduled one
The AI sends one SMS to one recipient, which uses credits, or validates and prices it first in sandbox mode. It can list and cancel scheduled messages.
Changes dataCheck or add numbers on the opt-out blacklist
The AI lists the blacklisted numbers or looks up one number, and adds a number of someone who asked to stop. It cannot remove a number again.
Changes dataCreate or update contact lists
The AI lists contact lists and their contacts, creates a list, renames a list or adds contacts to it. It sends nothing.
Changes dataHow do I connect Voodoo SMS?
Before you connect
The login page asks for your Voodoo SMS API key.
Create it in the Voodoo SMS portal under Send SMS → API SMS → RESTful API → Create New API Key and copy it when it is shown (it is shown only once). Choose Read-only if you only want reports and lists, or Read-write to let the AI send SMS (which uses your credits). Do not lock the key to an IP address. Your key is used only to call the Voodoo SMS API on your behalf; it is never shown to anyone.
Claude claude.ai · Desktop
- Open Customize → Connectors, then click + Add → Add custom connector.
- Enter the name Voodoo SMS and this URL, then click Add:https://
voodoo-sms. usefulapi. io/ mcp - Claude opens the login page: enter your Voodoo SMS API key.
- In a chat, click + → Connectors and turn on Voodoo SMS.
Team and Enterprise: an Owner adds the connector for the organization first.
ChatGPT chatgpt.com
- Open Plugins, click +, then Add custom MCP server.
- Enter the name Voodoo SMS and this URL, choose OAuth as the authentication, confirm the warning and create it:https://
voodoo-sms. usefulapi. io/ mcp - ChatGPT opens the login page: enter your Voodoo SMS API key.
- In Plugins, install Voodoo SMS, then choose it in a chat.
No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.
Claude Code
Run this command, then run /mcp in Claude Code to log in:
Cursor
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"voodoo-sms": {
"url": "https://voodoo-sms.usefulapi.io/mcp"
}
}
} VS Code
Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"voodoo-sms": {
"type": "http",
"url": "https://voodoo-sms.usefulapi.io/mcp"
}
}
} Codex
Run these commands. The second one opens the login page:
Other clients
Windsurf, Cline, Zed and other MCP clients: add this URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser.
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: the login page asks for your Voodoo SMS API key. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
Pricing
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 tool calls / month |
| Proper user | $9/mo · $90/yr | 10,000 tool calls / month |
| Pro+per user | $39/mo · $390/yr | 100,000 tool calls / month |
Each paid plan covers this Voodoo SMS server only. Ask your AI to run voodoosms_upgrade and choose Pro or Pro+, billed monthly or yearly (it returns a Stripe Checkout link). If you already have Pro, ask to change it to Pro+. The change requires your confirmation, keeps your billing interval and charges the price difference for the rest of the period immediately. Cancel any time with voodoosms_cancel_subscription: your paid plan continues to the end of the paid period, with no refund for the current period, and asking to resume the same plan with voodoosms_upgrade before then undoes the cancel. Or write to support@usefulapi.io.
Tools 17
Show all 17 tools (the AI picks them for you)
Read only · 8
- Get credit balance
voodoosms_get_creditsGet the SMS credit balance of the account. One credit pays for one 160-character SMS part (153 characters per part in a long message). - List delivery reports
voodoosms_list_delivery_reportsList delivery reports of sent messages (message_id, sender_id, to, sent_at, delivered_at, price, status), optionally filtered. Use it to check whether a message was delivered. Dates accept a UNIX timestamp, ISO 8601 (2026-10-01T09:00:00+00:00) or plain English ('yesterday', '2 weeks'). - List scheduled messages
voodoosms_list_scheduled_messagesList SMS that were scheduled through the send API and are still waiting to go out (messages scheduled in the portal's Web SMS are not shown). - List received SMS
voodoosms_list_inboxList SMS received on the account's Virtual Mobile Numbers (replies and keyword messages). Needs a purchased number; an empty inbox returns an empty result. Dates accept a UNIX timestamp, ISO 8601 or plain English. - List virtual mobile numbers
voodoosms_list_numbersList the Virtual Mobile Numbers (VMNs) the account has purchased, used to receive SMS. Returns an empty result if there are none. - List contact lists
voodoosms_list_contact_listsList the account's contact lists (id, name, status, size, created/updated times) without their contacts. Returns an empty result if there are none. - Get contacts in a list
voodoosms_get_contact_listGet one contact list including its contacts (id, number, status, dynamic_data, created_at). - List blacklisted numbers
voodoosms_list_blacklistList the numbers on the account's opt-out blacklist (no SMS is ever sent to them), or look up one number (`{empty: true}` means it is not on the list). Returns an empty result when the blacklist is empty.
Changes data · 5
- Send an SMS to one recipient
voodoosms_send_smsWRITE: SENDS A REAL SMS to ONE recipient and USES THE ACCOUNT'S CREDITS (1 credit per message part, charged whether or not it is delivered; it cannot be undone). `sandbox` is required: true validates and prices the message without sending or charging, false sends it for real. Optional `schedule` queues it for later (cancel with cancel_scheduled_message). Do not retry after an error or timeout without checking list_delivery_reports / list_scheduled_messages, or the recipient may get it twice. One recipient per call; there is no bulk or list send. - Cancel a scheduled SMS
voodoosms_cancel_scheduled_messageWRITE: cancels one SMS that was scheduled through the send API, so it will not be sent. A message that has already gone out cannot be cancelled. Whether credits are refunded for a cancelled message is not documented by the vendor. - Add a number to the blacklist
voodoosms_add_to_blacklistWRITE: adds one number to the account's opt-out blacklist; from then on no SMS is sent to it (sends to it fail with error 20). Use it for a recipient who asked to stop. This tool cannot remove a number again. - Create a contact list
voodoosms_create_contact_listWRITE: creates a new contact list with up to 500 contacts (the list name must be unique, at most 32 characters). It does not send anything. - Rename a contact list or add contacts
voodoosms_update_contact_listWRITE: renames a contact list and/or adds up to 500 contacts to it (existing contacts are not removed). Adding dynamic data needs a list created as dynamic. It does not send anything.
Your usefulapi plan · 4
- Usage status (free-tier meter)
voodoosms_usage_statusReport the caller's current usage: the plan, calls used this month, the limit of the plan (the free monthly cap or the Pro fair use limit), remaining, and whether the limit is reached. Read-only; does not count against the meter. - Request a missing feature
voodoosms_request_featureTell usefulapi that the user needs something the Voodoo SMS tools cannot do yet (a missing tool, field or filter). Call it only when the user asks for something none of the tools can do, and tell the user that you send the request. Do not call it for errors or for normal requests. Do not include personal data, credentials or customer records. Stored with the product name and the client type (for example Claude or Cursor), without the user's account. At most 5 requests per day. Does not count against the meter. - Upgrade to Pro or Pro+
voodoosms_upgradeGet a paid plan for Voodoo SMS (the free tier caps monthly usage). Pro: 10,000 tool calls a month, for normal use — plan "monthly" ($9/month) or "yearly" ($90/year, 2 months free). Pro+: 100,000 tool calls a month, for automations and heavy use — plan "plus" ($39/month) or "plus_yearly" ($390/year). Without a plan it returns both Pro and Pro+, each with a payment link, for the user to choose; with a plan, one link. An existing Pro subscription changes to Pro+ in place: call without confirm first, as the reply states the exact charge for this account (the price difference for the rest of the period, or in a free Pro trial the full Pro+ price, as the trial ends); then call with confirm: true. Cancel any time: the plan then runs to the end of the paid period, so it also suits a one-time job. A link opens Stripe Checkout in the browser; after payment the account upgrades automatically. Does not count against the meter. - Cancel the Pro subscription
voodoosms_cancel_subscriptionCancel the caller's Voodoo SMS Pro subscription at the end of the paid period (no refund for the current period; Pro continues until then, then the free tier applies). Requires confirm: true. Run voodoosms_upgrade later to undo the cancel before the period ends. Does not count against the meter.
FAQ
What can I do with Voodoo SMS in Claude or ChatGPT?
Check how many SMS credits are left. Check if sent texts were delivered. Read the replies that came into your inbox. Send an SMS or cancel a scheduled one. Check or add numbers on the opt-out blacklist. Create or update contact lists. See what you can do for the details.
Is this an official Voodoo SMS product?
No. usefulapi is an independent service. It is not affiliated with or endorsed by Voodoo SMS. The server calls the Voodoo SMS API with your own Voodoo SMS access, so it sees only the data that your account can see.
Can I connect Voodoo SMS to Claude or ChatGPT?
Yes. In Claude, add this server's URL as a custom connector. In ChatGPT, add it as a custom MCP server in Plugins. Then log in once. Cursor, VS Code, Claude Code and Codex work too. See the setup steps.
What do I need to connect?
The login page asks for your Voodoo SMS API key. See Before you connect for where to find it.
Do I put my Voodoo SMS key or an Authorization header in the client config?
No. 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: the login page asks for your Voodoo SMS API key. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
How do you keep my Voodoo SMS credentials?
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Voodoo SMS API for you and to derive a private account id for usage metering. usefulapi does not show them on any page or in any reply. To stop all access, remove the connector and change or delete these credentials in Voodoo SMS.
Can the AI change my Voodoo SMS data?
Yes, if you approve it. 5 of the 13 Voodoo SMS tools can create or change data. The other 8 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.
What does it cost?
The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with 10,000 tool calls / month. Pro+ costs $39/mo or $390/yr, with 100,000 tool calls / month. Each subscription covers this Voodoo SMS server only. Cancel any time: your paid plan then runs to the end of the paid period. Run voodoosms_usage_status to see how many calls you used.
How do I subscribe or cancel?
Ask the AI to run voodoosms_upgrade and choose Pro or Pro+, billed monthly or yearly: it returns a Stripe Checkout link. If you already have Pro, ask to change it to Pro+. After you confirm, your existing subscription changes in place, keeps its billing interval and charges the price difference for the rest of the period immediately. To cancel, run voodoosms_cancel_subscription. Your paid plan continues to the end of the paid period.
What if a Voodoo SMS tool that I need is missing?
Tell the AI what you wanted to do. It can send the request with voodoosms_request_feature. We store the text with the server name, the type of AI client and the tool you tried, not with your account, and read every request when we plan new tools. You can send up to 5 requests per day.
Which AI clients can I use?
Any client that supports remote MCP servers (Streamable HTTP) with OAuth login: Claude (web and desktop), Claude Code, ChatGPT, Codex, Cursor, VS Code, Windsurf and others.
This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.
Need a tool this server does not have, or a connection to another system? We build custom integrations and MCP servers.