Siima for AI agents
AI assistants can search Siima's travel eSIM catalogue and complete purchases for their users through our Model Context Protocol (MCP) server. The agent finds the right plan, hands the user a secure Stripe checkout link, and the eSIM — QR code, one-tap activation link, and manual codes — arrives in the buyer's email within a minute of payment. No account or signup required.
Add the MCP server
Pick your agent and paste the one-liner. Streamable HTTP transport, no authentication or API key required.
https://api.siima.online/mcp
In ChatGPT, open Settings → Connectors, turn on Developer mode under Advanced settings, then Add custom connector and paste the URL above (name it Siima, authentication None). Available on ChatGPT Plus, Pro, and Business.
Available tools
search_esim_plans
Search plans by country (ISO code), region, minimum GB, max price, or duration. Prices returned are the final checkout total. Pass an optional currency (USD, EUR, or GBP — defaults to USD) to price results and the max-price filter in that currency.
get_esim_plan
Full details for a single plan by id, priced in the requested currency (USD, EUR, or GBP).
create_checkout_link
Returns a secure siima.online checkout URL for a plan, in the requested currency (USD, EUR, or GBP). The buyer confirms their email with a 6-digit code, then pays; a link to the eSIM is emailed to them — no account needed.
list_destinations
All covered countries with plan counts and lowest prices.
list_regions
Every multi-country coverage area — regional areas such as "Europe+" or "South East Asia" and worldwide plans — with the countries each covers, plan counts, and cheapest total price. For an itinerary crossing several countries, pick an area whose country list covers the whole trip and pass its name as `coverage` to search_esim_plans.
REST API
Prefer plain HTTP? The public catalogue and checkout-link endpoints are open. Filters, response shapes and rate limits are in the eSIM API guide.
GET https://api.siima.online/api/v1/plans?country=JP
GET https://api.siima.online/api/v1/plans/:id
POST https://api.siima.online/api/v1/checkout/links
{ "planId": "<uuid>", "email": "[email protected]", "currency": "usd|eur|gbp" }For LLMs and crawlers
A machine-readable overview of Siima lives at siima.online/llms.txt, and the MCP server is described at /.well-known/mcp.json. All public content — destinations, plans, and guides — may be indexed and cited.
Guides
Best eSIM for AI agents covers the five MCP tools, the email-verified handoff model, and the REST endpoints in depth. How to buy an eSIM with ChatGPT walks through connecting this server in developer mode, step by step, and How to buy an eSIM with Claude does the same as a Claude connector.
Questions or partnership ideas? Email [email protected] · Browse destinations