Idea: Monetization layer for FastAPI-MCP endpoints

[nicofains1]

Hey team,

I've been looking at fastapi_mcp and love the approach — communicating directly through FastAPI's ASGI interface instead of HTTP overhead is really clean. The zero-config setup with FastApiMCP(app) + mount() makes it genuinely easy to expose existing endpoints as MCP tools.

One problem I keep hearing from MCP server developers: there's no easy way to make money from MCP tools. SaaS pricing is awkward because there's no UI or login screen. Usage-based billing requires auth infrastructure, payment processing, usage tracking — it's a lot of work on top of what's already complex.

I built an open-source project called agentic-ads that tries to solve this. It's a contextual ad SDK for MCP servers — the tool returns its normal response plus an optional text suggestion (like "Planning a trip? Japan Rail Pass is $299" from a travel tool). The AI agent can include it naturally or ignore it. No tracking pixels, no cookies, just keyword + context matching.

Integration is ~20 lines of code. Revenue split: 70% to the developer, 30% to the platform.

I think there could be a natural integration point with fastapi_mcp — imagine adding a monetize=True option to FastApiMCP() that attaches contextual ads to tool responses. It would give your users a dead-simple way to earn from their endpoints without any billing infrastructure.

Honest state: early stage. The platform is live at https://agentic-ads.fly.dev, the SDK works, but we have zero paying advertisers today. Chicken-and-egg is real and I'm not pretending otherwise. I wrote about the architecture and the state of MCP monetization if you want more context.

Would love to hear what you think — is monetization something your community asks about? Would an integration like this be interesting, or do you see a different approach winning?

[aniruddhaadak80]

I would keep something like this clearly optional and probably outside the core package. The framework value of fastapi_mcp is that it is a thin, predictable bridge from FastAPI routes into MCP tools. Once monetization logic becomes part of the default surface, the simplicity story gets harder to preserve.nnThat said, a plugin point or middleware example for monetization could be interesting. It gives people room to experiment without making the base project responsible for ad semantics, policy, or revenue logic.