MCP Server

Use Contiguity’s MCP server to give AI agents — in Cursor, Claude, ChatGPT, and more — the ability to send messages, emails, configure your account, and lease numbers on your behalf. The server is hosted at console.contiguity.com/mcp and uses OAuth to authenticate with your Contiguity account.

How it works

When you connect a client, you’re taken through a OAuth flow that links the session to your Contiguity account. After authorization, the client receives a short-lived token that it uses on every tool call. All requests are proxied to the Contiguity API and billed against your existing account quota.

On some plans, Contiguity may bill you for using the API via MCP. Confirm pricing at contiguity.com/pricing.

Quick connect

Add to Cursor

One-click install. Cursor will open an OAuth flow to connect your account.

Add to Claude

Click “Add custom connector,” enter the MCP server URL, and login. Click “Add” to finish setup.

Add to ChatGPT

Go to Settings → Apps → Advanced, enter the name and URL, then click Auth to connect.

Setup by client

Cursor
Claude
ChatGPT
Other clients

Click the Add to Cursor button above, or follow these steps manually:

Open MCP settings

In Cursor, go to Settings → Tools & MCP → New MCP Server.

Add the server

Paste this into your mcp.json:

{
  "mcpServers": {
    "contiguity": {
      "url": "https://console.contiguity.com/mcp"
    }
  }
}

Authenticate

Cursor will detect the server and prompt you to sign in with GitHub via your Contiguity account. Approve the OAuth request.

Start using it

Open Cursor’s agent and try: “Send an SMS to +1 555 000 1234 saying hello.”

Open ChatGPT Apps settings

Go to Settings → Apps → Advanced.

Requires ChatGPT Pro, Team, Enterprise, or Edu. You may need to enable Developer Mode in Advanced settings first.

Add a new app

Enter a name (e.g. Contiguity) and the URL:

https://console.contiguity.com/mcp

Authenticate

Click Auth — ChatGPT will redirect you through OAuth flow to connect your Contiguity account.

Enable in chat

Start a new chat, and ask it something like “Send an SMS to +1 555 000 1234 saying hello.”

Any MCP client that supports Streamable HTTP and OAuth 2.0 with PKCE can connect.

Setting	Value
Server URL	`https://console.contiguity.com/mcp`
Transport	Streamable HTTP
Auth	OAuth 2.0 (PKCE, S256)
Discovery	`https://console.contiguity.com/.well-known/oauth-authorization-server`

Available tools

Tool	Description
`send_sms`	Send an SMS or MMS to any phone number
`send_email`	Send a transactional email
`send_imessage`	Send an iMessage (requires leased iMessage number)
`get_text_history`	Get SMS/MMS conversation history for a thread
`get_imessage_history`	Get iMessage conversation history for a thread
`get_text_message`	Fetch a single message by ID
`check_imessage_availability`	Check if a number supports iMessage
`text_reaction`	Add or remove a reaction to an SMS/MMS message
`imessage_reaction`	Add or remove a tapback reaction to an iMessage
`imessage_mark_read`	Send a read receipt in an iMessage conversation
`imessage_typing`	Start or stop a typing indicator in an iMessage chat
`send_otp`	Send a one-time passcode via SMS
`verify_otp`	Verify an OTP using its ID
`resend_otp`	Resend an OTP
`reverse_otp_initiate`	Start a reverse OTP session (user sends code to you)
`reverse_otp_verify`	Poll a reverse OTP session for status
`reverse_otp_cancel`	Cancel an active reverse OTP session
`list_domains`	List email domains on your account
`register_domain`	Register a domain for email sending
`get_domain`	Get details about a registered domain
`delete_domain`	Delete a domain from your account
`list_entitlements`	List entitlements and their status
`apply_entitlement`	Apply for an entitlement
`revoke_entitlement`	Revoke an entitlement
`list_leased_numbers`	List your leased phone numbers
`list_available_numbers`	List numbers available to lease
`lease_number`	Lease a phone number
`terminate_lease`	Surrender a leased number
`configure_number`	Configure a leased number (e.g. failover)
`get_number_details`	Get details about a leased or available number

Full parameter reference for each tool is at docs.contiguity.com/api-reference.

Getting Started

SDK Documentation by Product

SDK Documentation by Language

How it works

Quick connect

Add to Cursor

Add to Claude

Add to ChatGPT

Setup by client

Available tools

​How it works

​Quick connect

Add to Cursor

Add to Claude

Add to ChatGPT

​Setup by client

​Available tools

How it works

Quick connect

Setup by client

Available tools