BuyUKeSIM for AI assistants
Give your AI assistant a way to actually get you online. BuyUKeSIM speaks MCP (Model Context Protocol), so a capable AI agent can browse plans, open a prepaid crypto wallet, and buy a travel data eSIM on your behalf - no account, no KYC, one endpoint.
MCP endpoint
https://buyukesim.com/mcpWho this is for
If a chat window is already where you plan trips, ship code, or run errands, this is built for you.
People who live in an assistant
You ask Claude or ChatGPT to plan the trip, so it may as well sort the eSIM too. Tell it where you are going and let it come back with real plans and prices.
Developers wiring up agents
One standard MCP endpoint, JSON-RPC over HTTP. Drop it into your client, no SDK to install, no OAuth dance to browse the catalogue.
Automation and workflows
A crypto-funded wallet with a hard spend boundary makes it safe to let a scheduled or autonomous agent buy connectivity when a task needs it.
What your assistant can do
We are honest about what is live versus what is on the way. Here is the real capability list today.
Browse plans, coverage and orders
Live nowSearch travel eSIM plans for any of 139+ countries, list covered regions with from-prices, read UK Number details, and check an order by its code.
Open a prepaid wallet
Live nowCreate an agent wallet with a single tool call. No email, no account, no KYC - just a key the assistant holds.
Fund it with crypto
Live nowCreate a deposit (from $10) in one of 12 cryptocurrencies, then check the balance and list transactions.
Buy a travel data eSIM
Live nowPurchase a data plan straight from the wallet balance with purchase_esim. The assistant places the order and gets the eSIM back instantly.
Buy the UK +44 number
Live nowBuy the UK Number (SMS + calls) from the wallet with purchase_uk_number - roughly $25 from stock, QR returned instantly, just like purchase_esim. This is live now.
One honest limit: your assistant cannot install the eSIM for you. Once it buys one, it hands you a QR code (or activation details) and you scan it on the device that will use it.
Why it fits AI agents
eSIMs are usually a mess of accounts, ID checks and card forms. We stripped all of that out - which happens to be exactly what an agent needs.
No account, no KYC
Nothing to sign up for and no identity to verify. An agent cannot fill in a passport photo, and now it does not have to.
Prepaid crypto wallet
The agent funds a wallet with crypto up front. Deposits are simple, and there is no card or billing profile sitting behind the transaction.
One endpoint, standard MCP
JSON-RPC 2.0 over Streamable HTTP at a single URL. Any MCP-capable client connects the same way - no bespoke integration.
Idempotent purchases
Buys are safe to retry. If a call drops mid-flight, repeating it will not double-charge the wallet - important when a model retries on its own.
Spend capped to eSIMs
Wallet balance can only be spent on eSIMs - it can never be withdrawn back out as crypto. So the worst an agent can do is buy an eSIM you did not want, not drain funds elsewhere.
Works with any assistant
Claude, ChatGPT, Cursor, Gemini, VS Code Copilot and other MCP clients all speak the same protocol. Pick your assistant, point it here.
Connect it
Browsing needs no key. To let the assistant open a wallet and buy, put an agent key in the URL path.
Browse-only (no key)
https://buyukesim.com/mcpWith an agent key (wallet + buy)
https://buyukesim.com/mcp/ak_live_YOURKEYAdd to Claude Code in one line
claude mcp add --transport http buyukesim https://buyukesim.com/mcpPer-client setup for Claude Desktop, ChatGPT, Cursor, VS Code, Gemini CLI and more is in the MCP setup guide.
What a real exchange looks like
Once connected, you just ask in plain language:
"I am flying to Japan next week. Get me a 5 GB data eSIM and pay from my wallet."
Behind the scenes your assistant:
- 1Calls search_esim_plans for Japan and picks a 5 GB plan
- 2Checks the wallet balance, and tops up with crypto if it is short
- 3Calls purchase_esim, retrying safely if the network hiccups
- 4Returns the QR code and a short order code for you to keep
You scan the QR on your phone and you are connected on landing. The assistant did the shopping, paying and bookkeeping - you did the one thing only you can do.
The products behind it
Same two eSIMs you can buy yourself on the site - your assistant just reaches them over MCP.
Questions people ask
Which AI assistants can use this?
Any assistant that supports MCP - Claude (Code and Desktop), ChatGPT, Cursor, Gemini CLI, VS Code Copilot, Windsurf, Cline and others. They all connect to the same endpoint; the setup guide has copy-paste config for each.
Can my assistant really buy an eSIM, or is this a demo?
Both are live today. The assistant can buy a travel/data eSIM (purchase_esim) and the UK +44 number (purchase_uk_number) straight from the wallet, and each returns a QR instantly. This is real, not a demo.
Do I need an account or KYC?
No. There is no sign-up, no email, and no identity check. The assistant holds an agent key, funds a wallet with crypto, and spends it on eSIMs. That is the whole flow.
Is it safe to let an agent spend money?
The blast radius is small by design. Wallet balance can only ever be spent on eSIMs and can never be withdrawn as crypto, and purchases are idempotent so a retry will not double-charge. You also fund it yourself, so the agent can only spend what you have deposited.
Can the assistant install the eSIM onto my phone?
No - and no eSIM service can. Installation means scanning a QR on the target device, which only you can do. The assistant buys the eSIM and hands you the QR; you scan it.
What does it cost?
Travel data eSIMs start from $0.99, the UK +44 number is about $25, and wallet deposits start at $10. The assistant reads live prices from the catalogue, so it always quotes the real number.
Endpoint is JSON-RPC 2.0 over HTTP POST (Streamable HTTP). Questions? Reach us on Telegram @buyukesimbot.