Access that takes care of itself.
Portmii checks who can use your tool. Customers sign in with OAuth or an API key. You decide what their plan unlocks.
You build the server.
We open the doors.
Sell access to your MCP server. Portmii handles
authentication, subscriptions and usage limits. You keep building.
MCP preview. Contact us to confirm availability before integrating. Ask about MCP
Your MCP serverRuns in your infrastructure
portmii mcpYOUR WORKSPACE
OnlineYour tool is live.
MCP customers24 / 25
Tool calls842 / 1,000
Access rulesActive
Try an access check
reports.generateAccess grantedActive subscription. Your customer can use the tool.
200Stripe connectedSample data · No real payment
Payment confirmed.Access granted automatically.
stripeAccess, taken care of.
Room for your product.
MCP connects AI applications to tools and data. Portmii lets you control who can use them and at what price.
A subscription for your tools.
Connect your Stripe products to Portmii. Payment status determines access. Stripe continues to handle invoices and payments.
You set the limits.
Choose how many tool calls each plan includes. Track usage and adjust your offer as it grows.
Your server stays with you.
Add access checks with the TypeScript SDK or HTTP API. Your MCP server keeps running in your infrastructure.
Every call, accounted for.
Only success counts.
Portmii reserves usage before your tool runs and records it only when the call succeeds. Your server does the work.
tools/callreports.generateClaude calls reports.generate on your MCP server with the customer’s API key.POST /usage/reservationscost: 1Your server asks Portmii to reserve one call. Portmii checks identity, plan and quota.200 RESERVEDremaining: 157Access confirmed. One call is held for this request.execute()on your serverYour handler runs in your infrastructure, not on Portmii.POST …/commitreservationIdThe tool succeeded. Your server commits the reservation.200 COMMITTEDused: 843The call now counts as usage for this billing period.resultcontent[ ]The customer gets the result.tools/callreports.generateClaude calls reports.generate on your MCP server with the customer’s API key.POST /usage/reservationscost: 1Your server asks Portmii to reserve one call. Portmii checks identity, plan and quota.429 usage_limit_exceedednothing reservedThe plan’s quota is used up. Portmii rejects the reservation.execute()not calledWithout a confirmed reservation, your tool is never executed.errorplan limit reachedThe customer gets a clear error and can upgrade their plan.tools/callreports.generateClaude calls reports.generate on your MCP server with the customer’s API key.POST /usage/reservationscost: 1Your server asks Portmii to reserve one call. Portmii checks identity, plan and quota.200 RESERVEDremaining: 157Access confirmed. One call is held for this request.execute()throws: timeoutYour handler fails, for example on an upstream timeout.POST …/releaseoutcome: tool_errorYour server releases the reservation with a stable outcome code.200 RELEASEDremaining: 158The held call returns to the quota. Nothing is charged.errorno usage chargedThe customer gets an error. Their quota is untouched.- Used this period
- 842
- Reserved
- 0
- Remaining
- 158
- Reservation
- —
Sample data. Plan limit 1,000 calls. Read the Runtime API reference
Fits your code.
And your workflow.
Mount portmii.auth before your MCP route, then wrap each handler with portmii.tool. The middleware handles customer authentication; the wrapper reserves usage, commits resolved calls and releases when a handler throws.
Choose OAuth, API keys or both. The TypeScript SDK supports Node.js 20+ and the official MCP SDK v1 and v2. Other languages can use the same flow through the HTTP API.
Open the API documentationSDK configuration & behaviorRead the integration guidePortmii SDKTypeScript
npm install @portmii/mcpimport { createPortmii } from '@portmii/mcp';
import { z } from 'zod/v4';
const portmii = createPortmii({
authType: 'OAuth', // or 'API_KEY' | 'FULL_AUTH'
providerKey: process.env.PORTMII_PROVIDER_KEY!,
serverUrl: 'https://provider.example/mcp',
});
// Mount before your MCP HTTP route.
app.use(portmii.auth);
mcp.registerTool(
'echo',
{ inputSchema: z.object({ message: z.string() }) },
portmii.tool('echo', ({ message }) => ({
content: [{ type: 'text', text: message }],
})),
);Use your existing Node/Express app and MCP server. Register echo in Portmii and match the product’s auth mode. Keep provider keys on your server.
Your first tool.
Your next customers.
Unlimited tool calls on every plan. Grow with lower transaction fees and Creator features.
Portmii MCPMonthly. Clear. Simple.
MCP preview. Contact us to confirm availability before integrating. Monthly prices. MCP transaction fees apply to your MCP sales; Stripe fees apply separately.
Free
Launch your MCP business.
€0/ month
Ask about Free- Unlimited tool calls
- 7.5% MCP transaction fee
Creator Free included
Pro
Room to growKeep more of each sale as your business grows.
€19/ month
Ask about Pro- Unlimited tool calls
- 3% MCP transaction fee
Creator Free included
Business
Grow your MCP business with Creator Enterprise.
€49/ month
Ask about Business- Unlimited tool calls
- 1% MCP transaction fee
Creator Enterprise included
Unlimited calls for your MCP business. Set your own customer limits. Rate limits still apply; server hosting and AI costs remain yours.
Compare all features+
| Feature | Free | Pro | Business |
|---|---|---|---|
| Tool calls | Unlimited | Unlimited | Unlimited |
| MCP transaction fee | 7.5% | 3% | 1% |
| Included Creator plan | Free | Free | Enterprise |
| Products, tools & access rules | Included | Included | Included |
| OAuth & API keys | Included | Included | Included |
| Customer plans & subscriptions | Included | Included | Included |
| Customer management | Included | Included | Included |
| Usage analytics & audit history | Included | Included | Included |
Good to know before you start.
Still have a question? Email us at support@portmii.com.
What does Portmii do?
Portmii helps you sell digital products and access. Portmii MCP lets you sell access to your MCP server. Connect delivers licenses and community access after purchase. Links brings your offers together on a link-in-bio page.
What is an MCP server?
An MCP server gives AI applications access to tools and data. MCP stands for Model Context Protocol. Portmii adds authentication, paid subscriptions and usage limits so you can sell access to your server.
Where does my MCP server run?
Your server stays in your own infrastructure. Integrate Portmii with the TypeScript SDK or HTTP API. Portmii checks access and records usage.
How do payments work?
Stripe handles payments, invoices and subscription payment status. Portmii uses that status to grant the right access. MCP transaction fees are 7.5% on Free, 3% on Pro and 1% on Business. Connect license and community sales have a separate 1% platform fee. Stripe fees apply separately.
What does unlimited MCP usage include?
Every MCP plan includes unlimited tool calls, with no monthly provider call quota. You can still set usage limits for your own customers. Rate limits and access checks continue to apply. You host your MCP server and cover its infrastructure and AI costs.
Can I start for free?
MCP Free costs €0 per month with unlimited tool calls and a 7.5% MCP transaction fee, plus Stripe fees on payments. Creator Free is included in MCP Free and Pro; Business includes Creator Enterprise. The standalone Links Free plan includes up to three links, profile analytics and Connect. MCP preview. Contact us to confirm availability before integrating.