usefulapiBulkSMS MCP server
Read BulkSMS messages, replies, profile and webhooks; send SMS to up to 10 numbers. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
What can I ask?
Turn on the BulkSMS connector, then ask in plain words. The AI picks the tools.
- How many SMS credits do I have left in my account?
- Show the text messages we sent since yesterday and their delivery status.
- Did anyone reply to the text I sent this morning?
- Which phone numbers are blocked from receiving our messages?
What you can do with BulkSMS in Claude and ChatGPT
For teams who send text messages to customers with BulkSMS.
Check our credits, daily quota and sender ids
Shows the account's credit balance and limit, the daily message quota with what is left today, and the sender ids it may use.
Review sent and received messages and their status
Lists sent and received messages, newest first, from the last 7 days or from a date you give, and opens one for its body, status, parts and credit cost.
Check if anyone replied to a message
Lists the replies linked to a sent message. This works for messages sent with a repliable sender.
Check blocked numbers and webhooks
Lists the phone numbers the account may not send to, and the webhooks with their trigger and active flag.
Send a text message to up to 10 numbers
Sends one message text to 1 to 10 phone numbers in international format. It sends real messages that use credits.
Changes dataBlock a phone number
Adds one phone number to the account's blocked list, so no more messages are sent to it.
Changes dataHow do I connect BulkSMS?
Before you connect
The login page asks for your API token ID and API token secret.
Create a token in BulkSMS under Settings > Developer Settings > API Tokens (not your account password). Sending SMS through this server spends credits from your account. Your token is used only to call the BulkSMS 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 BulkSMS and this URL, then click Add:https://
bulksms. usefulapi. io/ mcp - Claude opens the login page: enter your API token ID and API token secret.
- In a chat, click + → Connectors and turn on BulkSMS.
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 BulkSMS and this URL, choose OAuth as the authentication, confirm the warning and create it:https://
bulksms. usefulapi. io/ mcp - ChatGPT opens the login page: enter your API token ID and API token secret.
- In Plugins, install BulkSMS, 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": {
"bulksms": {
"url": "https://bulksms.usefulapi.io/mcp"
}
}
} VS Code
Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"bulksms": {
"type": "http",
"url": "https://bulksms.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 API token ID and API token secret. 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 BulkSMS server only. Ask your AI to run bulksms_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 bulksms_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 bulksms_upgrade before then undoes the cancel. Or write to support@usefulapi.io.
Tools 12
Show all 12 tools (the AI picks them for you)
Read only · 6
- Get account profile and credits
bulksms_get_profileShow the BulkSMS account: username, credit balance, credit limit, whether credit transfer is allowed, the daily message quota (size and remaining today) and the sender ids this account may use. Company and billing details are left out. - List messages
bulksms_list_messagesList sent (SENT) and received (RECEIVED) SMS messages, newest first by default. BulkSMS limits the window to the last 7 days unless submission_date_from is given. To page newest-first, pass before_id = the smallest id of the previous page; with sort_order ASCENDING pass after_id = the largest id of the previous page. REST: GET /messages with a `filter` built from the arguments. - Get message
bulksms_get_messageGet one sent or received message by its id: body, recipient, delivery status, number of parts and credit cost. - List replies to a sent message
bulksms_list_repliesList the received (RECEIVED) replies linked to a sent message id. Only messages sent with a REPLIABLE sender have linked replies. An empty list means none or an unknown id. - List blocked numbers
bulksms_list_blocked_numbersList phone numbers the account may not send to (added via the API, by a recipient replying STOP, or by BulkSMS). To page, pass min_id = the largest id of the previous page + 1. - List webhooks
bulksms_list_webhooksList the account's webhooks (name, trigger SENT/RECEIVED, active flag, invoke option). Only the host of each webhook URL is shown: the path and query can hold a secret. Read-only: webhooks are not changed by this server.
Changes data · 2
- Send SMS
bulksms_send_messageWRITE: SENDS REAL SMS to real people and SPENDS CREDITS from the user's BulkSMS account; it cannot be undone or recalled. One message text to 1 to 10 phone numbers in international format (e.g. +447700900000). Cost = credits per message part x number of parts x number of recipients (about 1 credit per 160-character GSM part to a standard-route destination; the exact cost depends on the destination and appears as creditCost on the sent messages afterwards). Messages longer than one part are concatenated up to max_parts parts (default 3). Non-GSM characters (emoji, accents outside GSM 03.38) are replaced by "?" unless auto_unicode is true, which sends Unicode (shorter parts, more credits). Messages to blocked numbers still cost credits. Only send what the user explicitly asked for, confirm the text and recipients first. No groups, no scheduling. Texts containing BulkSMS template placeholders such as {F0###}, {fn###} or {sn###} are rejected (they would merge contact data). - Block a phone number
bulksms_block_numberWRITE: adds ONE phone number to the account's blocked list, so that no further messages are sent to it (a send to a blocked number fails with FAILED.BLOCKED and still costs credits). This API has no way to remove a block again: do it only when the user asks for it.
Your usefulapi plan · 4
- Usage status (free-tier meter)
bulksms_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
bulksms_request_featureTell usefulapi that the user needs something the BulkSMS 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+
bulksms_upgradeGet a paid plan for BulkSMS (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
bulksms_cancel_subscriptionCancel the caller's BulkSMS 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 bulksms_upgrade later to undo the cancel before the period ends. Does not count against the meter.
FAQ
What can I do with BulkSMS in Claude or ChatGPT?
Check our credits, daily quota and sender ids. Review sent and received messages and their status. Check if anyone replied to a message. Check blocked numbers and webhooks. Send a text message to up to 10 numbers. Block a phone number. See what you can do for the details.
Is this an official BulkSMS product?
No. usefulapi is an independent service. It is not affiliated with or endorsed by BulkSMS. The server calls the BulkSMS API with your own BulkSMS access, so it sees only the data that your account can see.
Can I connect BulkSMS 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 API token ID and API token secret. See Before you connect for where to find them.
Do I put my BulkSMS 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 API token ID and API token secret. 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 BulkSMS credentials?
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the BulkSMS 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 BulkSMS.
Can the AI change my BulkSMS data?
Yes, if you approve it. 2 of the 8 BulkSMS tools can create or change data. The other 6 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 BulkSMS server only. Cancel any time: your paid plan then runs to the end of the paid period. Run bulksms_usage_status to see how many calls you used.
How do I subscribe or cancel?
Ask the AI to run bulksms_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 bulksms_cancel_subscription. Your paid plan continues to the end of the paid period.
What if a BulkSMS tool that I need is missing?
Tell the AI what you wanted to do. It can send the request with bulksms_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.