1,600 weekly downloads. From a weekend hack.
And that’s not some viral gimmick — it’s Agent Toolbelt, a bare-bones MCP server packing everyday dev utils like UUIDs, base64, JSON pretty-printing. Published to npm in January 2025, npx agent-toolbelt, and boom: Claude Desktop lights it up for users. Modest numbers? Sure, npm’s got monsters with millions. But here’s the data point: in an ecosystem with just hundreds of MCP packages amid 2 million total, this screams opportunity.
Search npm for MCP servers yourself. Few hundred hits. Now scan the software world — DevOps, CRMs, analytics, cloud CLIs. Most verticals? Zero tools. One, if lucky. It’s 2012 npm all over again, wild west for AI agents.
Within weeks, it was getting over 1,600 weekly downloads.
npx agent-toolbelt
One command. Claude sees the tools. Developers use them. That’s the entire distribution story.
The author nails it. No marketing blitz. Pure npm magic funnels users straight to your code.
Why Is MCP npm Still a Ghost Town?
Look, AI hype’s everywhere, but tools lag clients. Claude’s ready — Desktop app, VS Code extensions incoming. Protocol’s stable; Anthropic’s iterating fast. Yet packages? Pathetic coverage.
Developer tools: Git’s basic, sure, but Docker ops? CI/CD tweaks? AWS CLI wrappers? Crickets.
Business side: Jira hooks, Slack bots, Salesforce pulls — nada.
Data world: Query your DB, viz in Claude? Dream on.
Niche plays like FHIR for health or legal doc parsing? Untouched gold.
It’s not tech hurdles. It’s first-mover laziness. You’re staring at unclaimed turf while others nap.
Can a Weekend MCP Tool Pay Real Bills?
Damn right — if you ladder up smart.
Level 1: Free npm drop. Agent Toolbelt style. Weekend build, hour publish. Returns? Stars, cred, proof for your resume. Compounds like crypto in ‘09.
But don’t stop. Level 2: Host remotely. HTTP endpoint, auth, tiers. Stock analyzer? Free 10/day, $19 unlimited. Deploy in evenings. 50 subs? $950/month. Side cash, baby.
Level 3: Full app. Chat UI over your MCP backend. Weeks of grind, sure, but recurring SaaS.
Crunch the numbers:
10 subs: $190/month, $2,280/year.
25: $475/month, $5,700/year.
50: $950/month, $11,400/year.
100: $1,900/month, $22,800/year.
Tiny vs. VC beasts? Yeah. Perfect for bootstraps. And npm’s your flywheel — every npx converts.
Here’s my unique angle the original skips: this mirrors Twilio’s 2008 API playbook. Back then, SMS was siloed; they cracked it open for devs. MCP’s doing that for agent tools. Early Twilio wrappers exploded into empires. Plant your flag now, or watch incumbents scoop verticals.
Three forces align — don’t sleep.
Stable protocol. No breakage roulette.
Clients everywhere. Claude leads; others follow.
Early ecosystem. Hundreds packages, not millions. Firsties win big.
Wait 12 months? Incumbents everywhere. Easy wins vanish.
What MCP Verticals Scream ‘Build Me’?
Pick narrow, solve pain.
Git beyond commits — branch merges, PR diffs via Claude.
Docker: spin containers, logs, without CLI hell.
Cloud: AWS Lambda deploys, GCP secrets — agent-native.
CRM: HubSpot leads to Slack pings.
Analytics: SQL queries, dashboard mocks in chat.
Niche: E-com pricing scrapes, legal compliance scans.
Each? npm package. Free hook to paid host.
Skeptical take: Not every idea scales. Test with free version — downloads signal demand. No traction? Pivot fast. Corporate PR spins ‘revolutionary’ on every AI tweak; this is real, gritty opportunity.
Build time: 2-3 weekends.
Host: $5/month.
Funnel: Dev.to + npm.
My prediction? Top 10 verticals claim 10k+ downloads by EOY 2025. Yours could be one — if you ship.
But here’s the rub — effort’s low only if you scope tight. Sprawling ‘everything’ tools flop. Nail one itch.
The bar’s comically low. Agent Toolbelt proves it. Don’t overthink; publish.
🧬 Related Insights
- Read more: 30 AI Agents and Your Orchestrator Dies: Meet the Quadratic Swarm That Scales
- Read more: KubeVirt 1.8 Kills the VMware Argument (And Broadcom Knows It)
Frequently Asked Questions
What are MCP tools for npm?
MCP servers are npm packages that let AI agents like Claude call local utilities — think encoders, CLIs, integrations — via a simple protocol. npx to run.
How do I build and publish an MCP server?
Code in Node.js implementing MCP spec, test with Claude Desktop, npm publish. Weekend job for basics.
Can MCP tools make money as a side project?
Yes — free npm for funnel, host paid tiers. 50 users at $19/month nets nearly $1k MRR.
