Open Source Maintainer Leads: npm & PyPI

Turn the npm and PyPI registries into a B2B lead list. Search by keyword and get, for every package, the maintainer or author's public email, the repository, homepage, monthly downloads, and the last publish date. One lead per package.

Open source maintainers are a captive, high-value market for developer tools, supply-chain security, and DevRel. Both registries publish maintainer contact info, so leads are reachable with no guessing and no API key.

Who buys this

• Developer-tool SaaS (CI/CD, testing, monitoring) selling to package authors.
• Supply-chain security vendors (SCA, dependency scanning) whose top targets are maintainers.
• DevRel and community teams running outreach and partner programs.
• Technical recruiters sourcing active open-source contributors.

How it works

1. For each keyword it searches npm (full keyword search) and name-matches the PyPI index, prioritising exact and prefix matches.
2. For each package it reads the registry record for the maintainer/author public email, repository, homepage, and downloads.
3. Each package is scored and tiered, then pushed as one lead.

Output

One row per package:

{
  "registry": "npm",
  "name": "express",
  "url": "https://www.npmjs.com/package/express",
  "description": "Fast, unopinionated, minimalist web framework",
  "author": "TJ Holowaychuk",
  "email": "tj@vision-media.ca",
  "emails": ["tj@vision-media.ca", "wes@wesleytodd.com"],
  "maintainers": ["wesleytodd", "jonchurch"],
  "repository": "https://github.com/expressjs/express",
  "homepage": "https://expressjs.com/",
  "monthlyDownloads": 456438953,
  "lastPublished": "2026-05-10T12:00:00.000Z",
  "tier": "qualified_lead",
  "leadScore": 94
}

Tiers and pricing

Pay per lead. The first 10 qualified_lead per run are free so you can validate output.

Tier	Meaning	Price
listing	Package data, no public email or repository	$0.01
lead	A public maintainer email or a repository link	$0.02
qualified_lead	A public email and monthly downloads at or above the bar	$0.05

Both registries are keyless JSON APIs, so runs are fast and cheap, and a single run can return thousands of leads.

Input

Field	Default	Notes
keywords	[]	Search terms, one query each.
registries	both	npm + PyPI, npm only, or PyPI only.
maxLeads	200	Cap total leads per run.
maxPerKeyword	80	Candidate packages per keyword per registry.
minMonthlyDownloads	0	Drop packages below this download count.
qualifiedMinDownloads	1000	Download bar for the qualified_lead tier.
requireEmail	false	Only keep packages with a public email.

Notes

• npm publishes author and maintainer emails in the package record; some maintainers use a noreply address, which is filtered out.
• PyPI keyword search is not available programmatically, so PyPI is discovered by name-matching the official package index (exact and prefix matches first).
• Respect each registry's terms and applicable outreach laws when contacting maintainers.

Run it

This actor runs on Apify: https://apify.com/scrapemint/oss-maintainer-leads

Part of the Scrapemint catalog of 85+ pay per use data actors. Catalog: https://github.com/Ken-Mutisya/scrapemint Community and new drops: https://discord.gg/Ed2VNSHbr