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About SecondSim

econdSim provisions real UK mobile numbers (non-VoIP) via eSIM, built for freelancers, sole traders, small businesses, and enterprise teams. Unlike VoIP apps and virtual numbers, SecondSim numbers register as genuine physical endpoints on the Tier-1 UK cellular network — so they pass standard identity and security checks the same way any regular mobile number does.

Connection details

https://www.secondsim.co.uk/api/mcp

Setup

claude mcp add secondsim --transport http https://www.secondsim.co.uk/api/mcp

Tools

2

Checks if a specific SIM plan is available and valid.

Generates a Stripe Checkout URL for a real subscription in production or a test subscription in Stripe test mode. No charge occurs until the customer completes checkout. Completing checkout in production purchases real eSIMs.

Overview

Type: Remote Server (Streamable HTTP) Endpoint: https://www.secondsim.co.uk/api/mcp Category: Telecom / eSIM / Payments / Identity Verification

Overview

SecondSim provisions real UK mobile numbers (non-VoIP) via eSIM, built for freelancers, sole traders, small businesses, and enterprise teams. Unlike VoIP apps and virtual numbers, SecondSim numbers register as genuine physical endpoints on the Tier-1 UK cellular network — so they pass standard identity and security checks the same way any regular mobile number does.

This MCP server lets AI agents check plan availability and generate secure checkout links on a user's behalf, enabling end-to-end eSIM purchase automation.

What This Server Does

  • Check plan availability — query live UK eSIM plan inventory and pricing
  • Generate checkout links — create secure, dynamic Stripe Checkout sessions for 1–50 eSIMs in a single request
  • Idempotent purchases — built-in request deduplication (UUID-based idempotency keys) prevents duplicate charges from agent retries

Primary Use Cases

  • Small business deployment: instantly provision dedicated work numbers on employees' existing phones (BYOD) via eSIM — no separate hardware or corporate data plans required
  • Reliable identity verification: because SecondSim numbers are genuine cellular connections, customers pass SMS 2FA and identity checks with services that apply extra scrutiny to

Frequently asked questions

What is the SecondSim remote MCP server?

The SecondSim remote MCP server is a hosted Model Context Protocol endpoint at https://www.secondsim.co.uk/api/mcp, so AI assistants can connect to it without installing or running anything locally.

How do I connect to the SecondSim MCP server?

Add the endpoint https://www.secondsim.co.uk/api/mcp to any MCP-compatible client such as Claude Code, Cursor, or VS Code. The setup snippets on this page configure each client in one step.

Does the SecondSim MCP server require authentication?

No. SecondSim's MCP server does not require authentication — you can connect directly with the endpoint URL.

Which transport does the SecondSim MCP server use?

SecondSim exposes a Streamable HTTP endpoint, the transport used by remote MCP servers and supported by all major MCP clients.

Comments

Basic information

Transport

Streamable HTTP

Authentication

None

Category

Developer Tools

Submitted by

Rob Brock

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