FastMCP
The commercial infrastructure
for the agentic revolution
One labeled sponsored line inside your MCP server's tool responses. The host decides if it renders — if it doesn't, nobody pays. Nothing breaks.
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Now serving offers from live providers
One mechanism, everywhere agents run
See the same slot fill in three worlds
Claude
+ New chat
What's the weather in Am…
Weekend trip ideas
Expense report Q3
Renewing my passport
What's the weather in Amsterdam this weekend?
☀️ get_weather ⋯
host judgment, not an instruction
AMSTERDAMOvercast
27°
Feels like 27°C
50%16 km/h
Data: Open-Meteo
SPONSORED
KLM fares out of Amsterdam, 30% off this week Learn more →via Lulu Ads
KLM fares out of Amsterdam, 30% off this week Learn more →via Lulu AdsReply to Claude…↑
+$0.42 accrued · balance $18.60Agnostic by design — one SDK across every model, host, and agent framework.
Your server is the property. Rent out one slot — our MCP concierge installs it and manages it with you.
Your MCP server, your IDE, your agents — already doing the work. Lulu Ads makes it pay.
A living view of the network — simulated preview.
Never breaks your tool
A hard 150 ms budget and every failure returns None. Slow network, dead backend, bad config — your users never feel a thing. Engineered to be impossible to blame.
Disclosed, always
Every placement ships with an immutable "Sponsored" label baked into the contract itself. Your users' trust is the asset — the architecture protects it so you don't have to.
Junk never serves
Every creative must score 70+ on quality before it can even compete for your slot. Your tool's voice stays premium — whatever the bid.
One line. Every framework.
mcp.add_middleware(LuluAdsMiddleware()) and you're earning — FastMCP, LangGraph, CrewAI, and the raw MCP SDKs. Python and TypeScript, live on PyPI and npm.
Targeting without surveillance
We match on six context keys you choose to send — never transcripts, never profiles, never PII. Privacy here isn't a policy. It's physics.
Real money, honest math
70% of every audited conversion is yours, accruing from the first render. Cash out from $100. Unrendered = unpaid — every incentive stays clean.
“MCP servers answer millions of calls a day for free. One line of code makes them earn — 70% goes to you.”
70,000+ servers · every registry · one search
The largest MCP server marketplace in the world
Every MCP server, aggregated and deduped from every major registry — and the only index that pays the servers it lists.
Browse the marketplace→From the team
Notes on the agent economy
Monetization, distribution, and the render path — from the team building the layer.
Sponsored
weather-mcp — free forecasts
Powered by Lulu Ads
September 17, 2026
Ads just stopped being placements. OpenAI's Sponsored Agents made them participants
OpenAI introduced Sponsored Agents in ChatGPT on September 16 — an ad that opens into a task-completing conversation with a business's own agent. That's the agent-native ad thesis, validated at the frontier. It still only works inside one app.
Tal · Founder at Lulu150 ms
growth
Lulu MCPs just crossed 100,000 servers
100,000+ Model Context Protocol servers, deduped from every major registry into one index — the largest MCP marketplace in the world, by a wide margin. Here's what that actually means and what's new since launch.
walled garden vs. open
OpenAI just proved AI ads are real. It also proved they're building a walled garden.
Tens of thousands of marketers, 40 markets, a Pixel, a Conversions API — OpenAI validated that AI environments are the new search engine. It also confirmed the ads only work inside one app. Lulu is built for everywhere else.
So, what's your first slot?
One conversation with our MCP concierge gets you a publisher ID, your API key, and your first slot live.