Agencies are shipping AI agents to their clients — Claude, Cursor, Vercel. But before any AI runs, they need to plug into the client's tools: Meta Ads, Google Ads, GA4, HubSpot, Shopify, Stripe. Building OAuth flows and MCP servers for each client burns 4-8 hours per client. That's infrastructure tax, not a feature.
Dev time to build one MCP server for one client's tool stack from scratch
Client accounts an average agency runs — each requiring isolated MCP endpoints
Hosted MCP-as-a-service solutions for agencies that are natively multi-tenant
"We spent 3 weeks building MCP integration plumbing before we could run a single AI report for a client. That's not a product -- that's infrastructure tax."
— Agency CTO, 22-person shop
Claude Agent → MCPGateway API
GA4, Google Ads, HubSpot
Meta Ads, Klaviyo, Shopify
GA4, Stripe, Intercom
Agency connects a client's tools through Nango OAuth. No API keys to manage.
A scoped, multi-tenant MCP server is auto-provisioned instantly.
One URL. Your Claude agent connects immediately.
Built on Nango's OAuth infrastructure
Nango handles the hardest part: OAuth token lifecycle and 300+ integrations. We handle the MCP layer.
4,700+ MCP servers registered
20x growth in 4 months
MCP is now THE way for AI to connect to external systems.
MCP is 4 months old. Everyone else is still building.
OAuth + 300 integrations are solved. We layer MCP on top.
Agencies are shipping AI. They need a path to integrate clients.
API/integration tooling + AI infrastructure market. Growing 50%+ YoY. Includes Zapier, Make, n8n, custom integrations, and now MCP servers.
Digital agencies running AI agents: 50K+ agencies globally. Avg 12 client accounts. Total addressable spend on integration infrastructure: ~$4K/yr per agency.
Year 1 target: 2,000 subscribers at $157 ARPU ($3.14M/yr). Year 2: 8K subs at $157 ARPU ($12.56M/yr). Conservative but achievable.
Reference: Nango raised $14M Series A doing half of what MCPGateway does (just OAuth, no MCP layer).
| Product | Price | Hosted MCP | Multi-Tenant | Auto-Gen | Agency-Ready | Gap |
|---|---|---|---|---|---|---|
| MCPGateway | $79-499/mo | — | ||||
| Nango | $200-1,200/mo | OAuth only | ||||
| Zapier | $19-custom | No MCP, no AI | ||||
| Smithery.ai | Free/open | Registry only | ||||
| MCP.run | Freemium | Consumer-focused | ||||
| DIY | 4-8 hrs/client | Time cost |
First MCP-as-a-service provider built specifically for agency use cases
Multi-tenant architecture + auto-generation. Not just a wrapper around Nango.
Deep integration with MCP ecosystem (Claude, Anthropic, Cursor, Vercel). Others are external.
Agency economics work: $79-499/mo hits the sweet spot between free and enterprise.
Nango handles token lifecycle.
Instant provisioning per client.
One system, unlimited clients.
Claude, Cursor, Vercel, more.
Track API calls and revenue.
OAuth scoped access, encrypted tokens.
* LTV capped at 11-month horizon (conservative). Mathematical lifetime at 5% monthly churn = 20 months.
* Assumes $97 blended CAC · 5% monthly churn · 60/30/10 tier mix
Large TAM ($2B+), well-defined SAM.
No direct competitors. Nango nearby but not a threat.
Medium: OAuth bridge + MCP code gen. Supabase, Nango.
Clear SaaS+usage model. Agency fit obvious.
4.7K MCP servers. 20x growth in 4mo. Strong wind.
5 AC agency clients, Slack access, case studies
"MCP server", "OAuth integration", "multi-tenant SaaS"
Anthropic Discord, Product Hunt, Hacker News
Domain purchased
Supabase, Nango, MCP engine
5 clients
CF Pages, PH, HN
$15/day Google + Meta
PURSUE / PIVOT / KILL