Push GitHub Developer Leads to Mandrill (Mailchimp Transactional)

Why Mandrill for GitHub Developer Lead Outreach

Mandrill (Mailchimp Transactional) is the API-first transactional email platform used by teams that need high deliverability, template management, and send-time control in a single API. If your team already uses Mailchimp and wants to trigger transactional sequences from CRM or webhook events, Mandrill is the natural fit.

GitLeads does not send emails. It captures developer buying signals from GitHub — new stargazers on your tracked repos, keyword mentions in issues and PRs — and pushes enriched lead profiles to your tools via webhook. You configure Mandrill to receive that webhook and trigger a templated sequence. GitLeads finds the signal; Mandrill handles the send.

Architecture: GitLeads → Webhook → Mandrill

The integration works like this:

1. A developer stars a repo you track, or a keyword you monitor appears in a GitHub issue
2. GitLeads enriches the developer profile (name, email, GitHub username, company, bio, followers, top languages, signal context)
3. GitLeads POSTs the enriched lead to your configured webhook endpoint
4. Your webhook receiver (Node.js, Python, or any language) calls the Mandrill API to trigger a template send
5. Mandrill delivers the message with full tracking, analytics, and deliverability infrastructure

Setting Up the GitLeads Webhook

In the GitLeads dashboard, navigate to Integrations → Webhooks and add your endpoint URL. GitLeads will POST JSON to that URL each time a new signal fires:

{
  "signal_type": "stargazer",
  "repo": "your-org/your-repo",
  "github_username": "devuser",
  "name": "Alex Chen",
  "email": "alex@example.com",
  "company": "Acme Corp",
  "bio": "Backend engineer | Go, Python, PostgreSQL",
  "location": "San Francisco, CA",
  "followers": 312,
  "top_languages": ["Go", "Python", "TypeScript"],
  "signal_context": "Starred your-org/your-repo",
  "captured_at": "2026-05-07T14:23:00Z"
}

Node.js Webhook Receiver That Calls Mandrill

import express from 'express';
import Mailchimp from '@mailchimp/mailchimp_transactional';

const app = express();
app.use(express.json());

const mandrill = Mailchimp(process.env.MANDRILL_API_KEY!);

app.post('/webhooks/gitleads', async (req, res) => {
  const lead = req.body;

  // Only send to leads with a public email
  if (!lead.email) {
    return res.json({ skipped: true, reason: 'no_email' });
  }

  // Filter by signal quality (optional)
  if (lead.followers < 10) {
    return res.json({ skipped: true, reason: 'low_followers' });
  }

  try {
    await mandrill.messages.sendTemplate({
      template_name: 'github-stargazer-outreach',
      template_content: [],
      message: {
        to: [{ email: lead.email, name: lead.name, type: 'to' }],
        from_email: 'hello@yourcompany.com',
        from_name: 'Your Name at YourCompany',
        subject: `Saw you checking out ${lead.repo || 'our project'}`,
        merge_vars: [
          {
            rcpt: lead.email,
            vars: [
              { name: 'FNAME', content: lead.name?.split(' ')[0] ?? 'there' },
              { name: 'GITHUB_USERNAME', content: lead.github_username },
              { name: 'COMPANY', content: lead.company ?? '' },
              { name: 'SIGNAL_CONTEXT', content: lead.signal_context },
              { name: 'TOP_LANGUAGES', content: lead.top_languages?.join(', ') ?? '' },
            ],
          },
        ],
        tags: ['github-lead', lead.signal_type],
        metadata: {
          github_username: lead.github_username,
          signal_type: lead.signal_type,
        },
        track_opens: true,
        track_clicks: true,
      },
    });

    res.json({ sent: true, email: lead.email });
  } catch (err) {
    console.error('Mandrill error', err);
    res.status(500).json({ error: 'send_failed' });
  }
});

app.listen(3000);

Mandrill Template Setup

In Mandrill (via Mailchimp), create a template named `github-stargazer-outreach`. Use merge tags like `*|FNAME|*`, `*|GITHUB_USERNAME|*`, `*|COMPANY|*`, and `*|TOP_LANGUAGES|*` to personalize with the enriched GitHub data. A high-converting opening line for developers:

Subject: Saw you checking out [repo name]

Hey *|FNAME|*,

Noticed you starred [repo name] on GitHub — looks like you're working
with *|TOP_LANGUAGES|* at *|COMPANY|*.

[1-sentence pitch relevant to their stack]

Worth a quick look? [link]

— [Your name]

Filtering Leads Before Sending

Not every GitHub signal warrants an email. Apply filters in your webhook receiver before calling Mandrill:

• Require a public email: about 20–30% of GitHub users list one
• Require minimum follower count (e.g., 50+) to target community-active developers
• Filter by top language match — only ping Go developers if your tool is Go-centric
• Check signal_type: "keyword" signals (developer actively asking a question) often convert better than "stargazer" signals
• Rate-limit sends per domain to avoid over-contacting a single company

Alternative: Route Through Zapier or Make to Mandrill

If you prefer a no-code approach, GitLeads supports Zapier and Make natively. Set up a Zap or scenario: trigger on GitLeads new lead → filter by signal type → call Mandrill Send Template via its official Zapier action. No server required.