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Cello MCP

Remote MCP server (Streamable HTTP, OAuth) for Cello. Connect AI agents to your referral, partner, and affiliate program data — ask which referrers drive the most revenue, identify partners at risk of churning, get recommendations to improve conversion, and pull program metrics against benchmarks.

Server type: Remote (Streamable HTTP)
Auth: OAuth (browser sign-in)
Endpoint: https://mcp.cello.so/mcp
Pricing: Free with Cello account
Category: Marketing / Growth / Referral Management

Why This Matters for Operators

Referral programs drive 30% higher LTV than non-referred customers (SaaS Capital, 2026). But most operators check referral dashboards monthly at best — missing the window to re-engage partners before they churn. Cello MCP puts this data in your AI agent's context so you can:

  1. Ask "who should I reach out to today?" — and get the top referrers ranked by revenue, not just volume
  2. Catch churn before it happens — identify partners whose referral activity dropped 50%+ in the last 30 days
  3. Compare against benchmarks — know if your 4.2% referral conversion rate is competitive
  4. Validate integration health — confirm attribution is working correctly without opening a dashboard

For operators running any partner/referral/affiliate program, this is the first MCP server that puts program intelligence directly into your agent's tool set.

Tools & Capabilities

Capability Description
Live Program Metrics Revenue, conversion rates, active referrers, payout totals
Top Referrer Identification Ranked by revenue, volume, conversion rate
Churn Risk Detection Flag partners with declining activity patterns
Benchmark Comparison Compare your program metrics against industry benchmarks
Attribution Health Validate integration status, webhook delivery, and event tracking
Actionable Recommendations Get specific suggestions to improve program conversion
On-Demand Documentation Fetch setup guides and API docs in context

Configuration

Add to your MCP client configuration:

{
  "mcpServers": {
    "cello": {
      "type": "streamableHttp",
      "url": "https://mcp.cello.so/mcp"
    }
  }
}

Or via Claude Code: 

claude mcp add cello-mcp --transport http https://mcp.cello.so/mcp

First connection opens a browser for OAuth sign-in. Credentials are reused for subsequent sessions.

Use Cases for Business Operators

  • Daily partner pulse: "Which of my top 10 referrers haven't sent a referral in 2+ weeks?"
  • Program optimization: "What's my referral-to-trial conversion rate and is it above SaaS benchmark?"
  • Attribution debugging: "Is the webhook for Stripe payouts firing correctly for my last 5 referrals?"
  • Growth planning: "What's the ROI on my referral program this quarter vs. paid acquisition?"
  • Partner outreach: "Draft a re-engagement email for my top 3 dormant referrers"

Verdict

★★★ Catalogue immediately. First MCP server dedicated to referral/affiliate program intelligence. The "ask in plain language" approach eliminates the dashboard-checking friction that causes most operators to under-manage their referral programs. For any business running a partner or affiliate program, this replaces the monthly dashboard login with an always-available AI agent that can proactively flag issues and opportunities.

Additional Resources