Use asms with Cursor

Add asms to Cursor in one click. Cursor's agent can then get verification codes, rent numbers and read their SMS while it builds and tests your app.

Set it up Get an API key

Cursor · asms connected

Get me a US number for Telegram and give me the code when it arrives.

asms · get_pricingin stock

US Telegram numbers are in stock at the listed price, and you're only charged if a code arrives. Order one?

Yes, go ahead.

asms · create_otp_order+1 347 •••-••18

asms · poll_smscode received

Your number is +1 347 •••-••18 and the Telegram code is 504913.

What you can ask Cursor

Once asms is connected, Cursor can order numbers, read the SMS they receive and check your account, all paid from your asms wallet.

Get a verification code

“Order a UK number for WhatsApp and wait for the code.”

Rent a number you keep

“Rent a US number for a month for our app's SMS login tests, and show me any texts it gets.”

Check the account

“What's my asms balance, and which orders are still waiting for a code?”

Setup

The quick way: paste a prompt

Paste this into Cursor. It reads this page and follows the steps for agents below.

prompt

Connect the asms MCP server to Cursor by following the steps for AI agents at https://asms.ai/agents/cursor. My asms API key is in the ASMS_API_KEY environment variable; don't print it.

Add to Cursor

Or step by step

1
Click Add to Cursor
Cursor opens, adds asms and asks you to sign in with your asms account.

Or add it to mcp.json with an API key

Use ~/.cursor/mcp.json for every project or .cursor/mcp.json for one. ASMS_API_KEY must be set in your shell.

mcp.json

{
  "mcpServers": {
    "asms": {
      "url": "https://asms.ai/mcp",
      "headers": {
        "Authorization": "Bearer ${env:ASMS_API_KEY}"
      }
    }
  }
}

3
Check it
In Cursor's MCP settings asms should be on with its tools listed. Errors appear in the Output panel under MCP Logs.

For AI agents reading this page

If a user asked you to connect asms to Cursor, follow these steps in order.

Check whether the ASMS_API_KEY environment variable is set, without printing its value. If it is not set, the user can either sign in with asms when Cursor prompts for it, or create a key at https://asms.ai/dashboard#api-keys and set ASMS_API_KEY.
Register the server: add an "asms" entry to ~/.cursor/mcp.json (or .cursor/mcp.json) with url https://asms.ai/mcp and the header Authorization: Bearer ${env:ASMS_API_KEY}.
Check it worked: ask the user to confirm asms is enabled in Cursor's MCP settings with its tools listed.
Cursor picks up mcp.json changes on reload; ask the user to reload the window if the tools don't show.
Start read-only: call get_balance, then get_pricing or get_rental_offers, and report what you found.
Before any tool that spends from the wallet (create_otp_order, rent_number), tell the user the price and wait for their OK.
Never create an asms account or API key, top up the wallet, or approve a sign-in on the user's behalf, and never print the key.

Reference

MCP endpoint	https://asms.ai/mcp
Transport	Streamable HTTP (stateless)
Auth	OAuth sign-in with asms, or the header Authorization: Bearer <ASMS_API_KEY>
REST API	https://asms.ai/api-docs
For LLMs	https://asms.ai/llms.txt

Tools

Tool	What it does	Needs your OK?
`get_balance`	Wallet balance	No
`get_pricing`	Verification code prices	No
`get_inventory`	Verification number stock	No
`create_otp_order`	Order a verification number	Yes
`poll_sms`	Check for the verification code	No
`list_active_orders`	List verification orders	No
`cancel_order`	Cancel a verification order	Yes
`get_rental_offers`	Number rental prices	No
`rent_number`	Rent a phone number	Yes
`list_rentals`	List rented numbers	No
`read_rental_sms`	Read a rented number's SMS	No
`cancel_rental`	Cancel a rental for a refund	Yes

Other agents and tools

Claude Code Claude Codex ChatGPT VS Code Windsurf Gemini CLI opencode Grok OpenAI API any MCP client

Questions

What does it cost?+

Connecting is free. You pay from your asms wallet: verification codes from $0.50, charged only when a code arrives and refunded automatically when none does, and rented numbers priced by country and period. Top up by card, PayPal or crypto.

Will Cursor spend money without asking?+

Ordering a code and renting a number are marked as spending tools, so clients that support it ask for your approval first, and asms tells the agent to confirm the price with you before buying. Reading prices, balances and messages never spends anything.

What's the difference between a code and a rented number?+

A verification code order gives you a number for one code, for one service, and refunds itself if nothing arrives. A rented number is yours for a set period, from a day to a year, and receives every SMS sent to it: useful for testing your own app's SMS login or for an account you'll need to verify again later.

How do I disconnect it?+

Delete the API key in your asms dashboard, or remove asms under Connected apps if you signed in. Either one cuts off access straight away.

Give Cursor a phone number

Create an account, top up from a few dollars, and connect. Codes from $0.50, refunded automatically when none arrives.

Create your account All agents