Comparison
PayRun vs Gumroad for Selling MCP Tools
Gumroad is great for selling ebooks and courses. But MCP servers are a different animal.
If you want to charge for an MCP server, your mind might jump to Gumroad. It's the go-to for indie creators selling digital stuff. But MCP servers aren't digital downloads. They're live endpoints that AI clients call programmatically, and that difference matters a lot when it comes to billing.
What Gumroad is built for
Gumroad sells things. Someone pays, they get a file or a link or a license key. It's great at that. The checkout is clean, the payouts work, and creators love it.
But it's a storefront for digital products. It doesn't know anything about MCP, can't sit between your server and your users, and has no concept of metering API calls.
Where it falls short for MCP
No access control per request
When someone buys through Gumroad, you get notified and you could email them an API key. But now you need to build the system that validates that key on every MCP request. That's the auth middleware Gumroad doesn't provide.
No usage metering
If you want to charge per call or offer a free tier with limits, Gumroad can't help. It processes the payment and that's it. Counting requests, enforcing limits, and cutting off access when credits run out? That's all on you.
No proxy layer
This is the big one. Gumroad has no way to sit between your MCP server and the user's AI client. It can't intercept requests, check payment status, or gate access in real time. You'd need to build that entire layer yourself, and at that point Gumroad is just your checkout page.
Subscriptions are awkward
Gumroad does have subscriptions, but they're designed for content (newsletters, membership sites). Tying a Gumroad subscription to live API access requires webhook handling, a user database, and sync logic between Gumroad's subscription state and your auth system. It works, but it's a lot of glue code.
What the Gumroad + DIY approach looks like
If you tried to make Gumroad work for MCP billing, you'd end up with something like:
- Gumroad handles the payment
- Your webhook listener catches the sale and generates an API token
- You email the token to the buyer (or show it on a custom success page)
- Your MCP server validates the token on every request
- You build usage tracking, subscription sync, and a way to revoke tokens on cancellation
Steps 2-5 are the hard parts, and Gumroad doesn't help with any of them. You're essentially building your own billing system with Gumroad as the checkout page.
How PayRun handles this differently
PayRun is built specifically for this problem. Instead of a storefront that happens to process payments, it's a billing proxy that sits in front of your MCP server.
| Feature | Gumroad | PayRun |
|---|---|---|
| Payment processing | Yes | Yes |
| Per-request auth | No (build it yourself) | Built in |
| Usage metering | No | Built in |
| Proxy layer for MCP | No | Built in |
| Per-call pricing | No | Yes |
| Subscription billing | Sort of | Yes |
| Free tier / usage limits | No | Yes |
| MCP client config | Manual token setup | One URL |
| Platform fee | 10% | 10% |
The fees are actually the same. Both Gumroad and PayRun charge 10%. The difference is what you get for that 10%. With Gumroad, you get a checkout page. With PayRun, you get the full billing stack: auth, metering, proxy, dashboard, and payouts.
When Gumroad still works
If you're selling a one-time download that happens to include an MCP server config file, and you don't need usage limits or per-call billing, Gumroad is fine. It's basically a license key model. But you'll need to handle token generation and validation yourself.
For anything involving ongoing access, usage-based pricing, or subscriptions tied to a live endpoint, you need something built for that. That's what PayRun is.