Stack Overflow Email Scraper

Stack Overflow Email Scraper - emails published inside indexed Q&A pages

The Stack Overflow Email Scraper is an Apify Actor that collects publicly indexed email addresses from Stack Overflow and Stack Exchange pages. You give it keywords, an optional location and the email domains you care about, and it returns a structured dataset.

Read this before you run it: Stack Overflow indexes questions and answers rather than contact-bearing profiles, so many rows carry an email from a post body without a user handle. That is the defining characteristic of this Actor.

In live testing, essentially none of the parsed results resolved to a user identity. What the Stack Overflow Email Scraper returns is an email plus the question or answer page it appeared on - a real contact, without a profile link attached.

Why that happens, and when it is still useful

Stack Overflow's public pages are Q&A content. Google indexes questions, answers and tags far more heavily than user profiles, and Stack Overflow's profile pages rarely publish an address in the first place.

So the addresses that do surface come from post bodies: sample configuration files, error logs pasted into a question, SMTP and API examples, mailto: snippets in code, support addresses quoted in an answer.

That makes the Stack Overflow Email Scraper a technical-context email discovery tool, not a candidate sourcing tool. If you want engineers with handles and profile URLs, use the GitHub Email Scraper or the GitLab Email Scraper instead.

What the Stack Overflow Email Scraper reads

It reads only Google's public index of stackoverflow.com and stackexchange.com. It builds site: queries, fetches result pages through the Apify GOOGLE_SERP proxy, and extracts emails from titles and snippets.

It does not read git history, clone repositories, or use the Stack Exchange API. There is no login, no browser, no JavaScript rendering and no cookies anywhere in the pipeline.

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Key features of the Stack Overflow Email Scraper

Feature	What it does
Google site: dorking	Queries stackoverflow.com and stackexchange.com through the Apify GOOGLE_SERP proxy
Query expansion	Base, quoted and intitle: variants plus one variant per query modifier; base queries run first
Domain-filtered extraction	Keeps only emails ending in your customDomains values
Global deduplication	One row per unique email address across every query and page - important on a site where the same address is pasted into many threads
Obfuscation handling	Understands name [at] domain [dot] com, name (at) domain, name @ domain.com, domain .com, zero-width characters and the full-width ＠
Junk filter	Rejects placeholders such as email@, yourname@, test@, xxx@ and single-character locals - unusually valuable on a site full of sample code
Boundary-correct matching	@gmail.com never matches inside @gmail.company or @gmail.com.br
Soft-wrap repair	Discards a hit that is only the tail of another email in the same result block
Structural parsing	Locates the <h3> title then the smallest surrounding block, not Google's CSS class names
Whole-page fallback	A Google markup change degrades the run to "emails without account details", not "no emails"
Block detection	CAPTCHA, "unusual traffic" and consent pages are detected and retried rather than treated as empty
Retries and backoff	Up to 3 attempts per page, exponential backoff, a fresh proxy session per request
Requeue of failures	Blocked or failed queries are re-queued once at the end of the run
Async concurrency	An asyncio worker pool with a shared stop signal on maxEmails
Resumable state	Key-value-store progress keyed by an input hash, with throttled saves plus saves on PERSIST_STATE, MIGRATING and ABORTING
Streaming output	Leads reach the dataset as they are found, so an aborted run keeps what it collected
Run summary	Logs pages fetched, blocked pages, retries and emails per page

The junk filter deserves special mention here. Stack Overflow posts are full of user@example.com, test@test.com and yourname@domain.com, and the Stack Overflow Email Scraper drops those before they reach your dataset.

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How the Stack Overflow Email Scraper works

The Stack Overflow Email Scraper pipeline is six steps, with no authentication and no browser.

1. The Stack Overflow Email Scraper reads your input: keywords, location, email domains and limits.
2. It builds Google queries with the site: operator, for example site:stackoverflow.com smtp configuration "@gmail.com".
3. It fetches Google result pages asynchronously with aiohttp through the Apify GOOGLE_SERP proxy.
4. It parses each result block structurally, finding the <h3> title and the smallest block around it.
5. It extracts email addresses from the block text using a domain-filtered regex.
6. It deduplicates globally and pushes each lead straight into the Apify dataset.

Why query expansion is on by default

Google caps a single query at roughly 300 results, which is a hard ceiling regardless of how many pages you allow.

Query expansion gets the Stack Overflow Email Scraper past it by combining each keyword with each email domain in several phrasings, each variant carrying its own result budget.

The default queryModifiers - email, contact, maintainer, author, support - push queries toward the posts most likely to contain a real address rather than a code sample.

What the Stack Overflow Email Scraper does not do

No Stack Overflow login, no Stack Exchange API, no git history, no repository cloning, no JavaScript rendering. It is an independent Apify Actor, not affiliated with or endorsed by Stack Overflow or Stack Exchange.

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Stack Overflow Email Scraper input fields

Only keywords is required by the Stack Overflow Email Scraper. All defaults below are the ones shipped in the Actor's input schema.

Field	Type	Default	Meaning
keywords	array (required)	["developer", "engineer"]	Search terms describing the Stack Overflow content you want (niche, job title, technology)
location	string	""	Optional location phrase added to every query
customDomains	array	["@gmail.com", "@yahoo.com"]	Only emails on these domains are kept; the leading @ is optional
maxEmails	integer 1-10000	20	Stop after this many unique emails
countryCode	string	""	Two-letter country for the search proxy (US, GB, DE...)
expandQueries	boolean	true	Search each keyword x domain pair in several phrasings
queryModifiers	array	["email", "contact", "maintainer", "author", "support"]	Extra words combined with each keyword when expansion is on
maxPagesPerQuery	integer 1-50	30	Page cap per query
maxConcurrency	integer 1-20	5	Parallel queries

Example Stack Overflow Email Scraper input

{
  "keywords": ["smtp configuration", "sendgrid integration", "oauth support contact"],
  "location": "",
  "customDomains": ["@gmail.com", "@outlook.com"],
  "maxEmails": 200,
  "countryCode": "US",
  "expandQueries": true,
  "queryModifiers": ["email", "contact", "maintainer", "author", "support"],
  "maxPagesPerQuery": 30,
  "maxConcurrency": 5
}

Tuning the Stack Overflow Email Scraper

Technology and problem keywords beat role keywords in the Stack Overflow Email Scraper, because Stack Overflow content is organised around problems, not people.

Try mail server misconfiguration, vendor api support or a specific product name. Those threads are where real addresses appear; generic role searches mostly return code samples.

Add domains rather than keywords when a run comes back thin. Each additional domain multiplies the number of distinct queries and the total result budget.

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Stack Overflow Email Scraper output fields

Every dataset item the Stack Overflow Email Scraper writes has all 14 fields. Values are empty or null when Stack Overflow did not expose them in Google's result - and on this platform that is the common case for identity fields.

Field	Meaning
network	Platform name
keyword	The keyword that produced the lead
query	The exact Google query used
title	Raw result title - usually the question title
accountName	Account label Google prints; often absent on Q&A pages
fullName	Display name parsed from a profile-style title; empty for question and answer pages
username	URL-safe handle when Stack Overflow exposes one; otherwise null, which is the usual outcome here
profileUrl	Canonical https://stackoverflow.com/users/{username} URL when a handle is known; otherwise empty
url	Direct platform link when exposed, else the profile URL
description	Snippet text, cleaned of labels and engagement counters
email	Lower-cased email address
emailDomain	The matched domain, for example @gmail.com
possiblyTruncated	true when Google's snippet ellipsis touched the email - verify before sending
foundAt	ISO 8601 UTC timestamp

Example Stack Overflow Email Scraper output

[
  {
    "network": "Stack Overflow",
    "keyword": "smtp configuration",
    "query": "site:stackoverflow.com smtp configuration \"@gmail.com\"",
    "title": "Spring Boot JavaMailSender authentication fails with app password",
    "accountName": "",
    "fullName": "",
    "username": null,
    "profileUrl": "",
    "url": "https://stackoverflow.com/questions/70112233/spring-boot-javamailsender-authentication-fails",
    "description": "My config uses spring.mail.username=orion.builds@gmail.com and the app password from ...",
    "email": "orion.builds@gmail.com",
    "emailDomain": "@gmail.com",
    "possiblyTruncated": true,
    "foundAt": "2026-08-31T12:04:11.238Z"
  },
  {
    "network": "Stack Overflow",
    "keyword": "oauth support contact",
    "query": "site:stackoverflow.com oauth support contact \"@outlook.com\"",
    "title": "Vendor OAuth callback returns invalid_client - who to contact?",
    "accountName": "",
    "fullName": "",
    "username": null,
    "profileUrl": "",
    "url": "https://stackoverflow.com/questions/68990110/vendor-oauth-callback-returns-invalid-client",
    "description": "Their integrations team answered from lumen.integrations@outlook.com after I opened a ticket",
    "email": "lumen.integrations@outlook.com",
    "emailDomain": "@outlook.com",
    "possiblyTruncated": false,
    "foundAt": "2026-08-31T12:04:26.771Z"
  },
  {
    "network": "Stack Overflow",
    "keyword": "sendgrid integration",
    "query": "site:stackoverflow.com intitle:\"sendgrid integration\" contact \"@gmail.com\"",
    "title": "Priya Nair - Stack Overflow",
    "accountName": "Priya Nair",
    "fullName": "Priya Nair",
    "username": "4471209",
    "profileUrl": "https://stackoverflow.com/users/4471209",
    "url": "https://stackoverflow.com/users/4471209",
    "description": "Backend engineer. Email integrations and deliverability. priya.nair.dev@gmail.com",
    "email": "priya.nair.dev@gmail.com",
    "emailDomain": "@gmail.com",
    "possiblyTruncated": false,
    "foundAt": "2026-08-31T12:05:02.114Z"
  }
]

The first two rows are the typical case: a real email lifted from a post body, with username: null and an empty profileUrl. The third row - an actual profile with a numeric user id - is the shape a profile hit takes, but it is uncommon.

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Use cases for the Stack Overflow Email Scraper

Use case	How the Stack Overflow Email Scraper helps
Vendor and integration research	Surface support and integrations addresses quoted in answers about a specific product
Technical support discovery	Find the address people actually reached when they solved a given problem
Exposure and hygiene auditing	Check whether your own or your company's addresses have been pasted into public threads
Security research	Identify addresses leaked in configuration snippets so owners can be warned
Developer lead generation	Collect contacts appearing in threads around your product category
Community and ecosystem mapping	See which addresses recur across a technology's Q&A footprint
Documentation gap analysis	Find products whose users resort to emailing support publicly
Content research	Understand the questions where contact escalation happens

The audit angle is the strongest one

Because the Stack Overflow Email Scraper finds addresses inside pasted configuration and logs, it is genuinely good at answering "has anyone on my team leaked a working address into a public question?"

Set customDomains to your own corporate domain and run it. Anything it returns is an address that Google has indexed on a public Q&A page.

Combining with sibling Actors

Pair the Stack Overflow Email Scraper with the Dev.to Email Scraper and the Hashnode Email Scraper if your goal is technical writers who publish under their own names.

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Expected results from the Stack Overflow Email Scraper

In live test runs against Google, 0 out of 10 parsed results carried an account identity. Every usable row was an email found in a post body, with no handle and no profile URL.

This is the honest expectation to set. The Stack Overflow Email Scraper produces contacts with context - the question, the technology, the exact query - but not people-with-profiles.

Stack Overflow Email Scraper rows still carry email, emailDomain, url, title, description and query, which is enough to judge relevance before you write. Volume always depends on keywords and domains; no yield is guaranteed.

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Limitations of the Stack Overflow Email Scraper

• Q&A pages, not profiles. Stack Overflow indexes questions and answers rather than contact-bearing profiles, so many rows carry an email from a post body without a user handle. Expect username: null and an empty profileUrl on most rows.
• Publicly indexed emails only. An address is findable only when it is already visible in Google's index.
• No git history, no Stack Exchange API. Only Google result titles and snippets are parsed.
• Google's ~300-result cap. One query returns roughly 300 results at most, which is why expandQueries exists.
• possiblyTruncated. When true, Google's snippet ellipsis touched the email and it may be cut off. Post bodies are long, so this flag appears more often here than on profile-based platforms - verify those rows.
• username and profileUrl are usually empty. They are populated only when Stack Overflow exposes a handle in the result, which is the exception on this platform, not the rule.
• Apify GOOGLE_SERP proxy required. The Stack Overflow Email Scraper cannot run without Apify proxy credentials.
• Free plan cap. Free Apify plans are limited to 100 emails per run; paid plans are uncapped.
• Variable results. Output depends on keywords, domains and location, and Google's index changes over time.

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Responsible use

Many addresses the Stack Overflow Email Scraper finds were pasted into a question by accident, inside a config file or a log, by someone trying to fix a bug.

Treat those with particular care. An address in a stack trace is not an invitation to market to that person - and if it is a leak, the decent thing is to tell the owner, not to add them to a sequence.

If you contact people in the EU or UK, GDPR applies: have a lawful basis, identify yourself, say where you found the address, and honour opt-outs immediately. Respect Stack Overflow's community norms, which are firmly against unsolicited outreach.

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Stack Overflow Email Scraper FAQ

Why do most rows have no username or profile URL?

Because Stack Overflow indexes questions and answers rather than contact-bearing profiles, so many rows carry an email from a post body without a user handle. In live testing, 0 out of 10 parsed results resolved to an account identity.

Is the Stack Overflow Email Scraper a good candidate sourcing tool?

Not on its own. It finds emails in technical content, not engineers with profiles. For sourcing, run the GitHub or GitLab Actors in this family alongside it.

Does it read git history or use the Stack Exchange API?

No. It does not read git history, clone repositories or call any Stack Exchange API. It parses Google search results for already-indexed public pages on stackoverflow.com and stackexchange.com.

Do I need a Stack Overflow account?

No. There is no authentication, no browser, no JavaScript rendering and no cookies. The only credential involved is your Apify account's GOOGLE_SERP proxy access.

Where exactly does the Stack Overflow Email Scraper get the emails?

From Google's result titles and snippets: post bodies, configuration snippets, logs, mailto: code, quoted support addresses, and occasionally a profile page.

How does the Stack Overflow Email Scraper avoid sample addresses like user@example.com?

A junk filter rejects placeholders such as email@, yourname@, test@, xxx@ and single-character locals. It is the reason output is usable on a site full of example code.

How many emails can one Stack Overflow Email Scraper run return?

maxEmails accepts 1 to 10000 and defaults to 20. Free Apify plans are capped at 100 emails per run; paid plans are uncapped.

What does possiblyTruncated: true mean?

Google's snippet ellipsis touched the address, so it may be incomplete. This is more common here than on profile-based platforms because post snippets are long - always verify those rows.

Can I audit my own domain with it?

Yes. Put your corporate domain in customDomains and run it. The Stack Overflow Email Scraper will return your addresses that Google has indexed on public Q&A pages.

Does the Stack Overflow Email Scraper handle obfuscated addresses?

Yes. It normalises [at], (at), spaced @, spaced .com, zero-width characters and the full-width ＠.

What happens if a Stack Overflow Email Scraper run is interrupted?

Progress is stored in the key-value store keyed by a hash of your input, with saves on PERSIST_STATE, MIGRATING and ABORTING. Leads already pushed to the dataset are kept.

Is the Stack Overflow Email Scraper affiliated with Stack Overflow?

No. It is an independent Apify Actor, not supported, endorsed or affiliated with Stack Overflow or Stack Exchange.

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Related Actors

The Stack Overflow Email Scraper is part of a Developer & Technology family of Apify Actors that apply the same method to different platforms. Several of them have much stronger identity coverage.

Actor	What it collects
App Store Email Scraper	Public contact emails from App Store
Atlassian Marketplace Email Scraper	Public contact emails from Atlassian Marketplace
Bitbucket Email Scraper	Public contact emails from Bitbucket
Chrome Web Store Email Scraper	Public contact emails from Chrome Web Store
CodePen Email Scraper	Public contact emails from CodePen
Confluence Email Scraper	Public contact emails from Confluence
Dev.to Email Scraper	Public contact emails from DEV Community
Docker Hub Email Scraper	Public contact emails from Docker Hub
Figma Community Email Scraper	Public contact emails from Figma Community
Firefox Add-ons Email Scraper	Public contact emails from Firefox Add-ons
GitHub Email Scraper	Public contact emails from GitHub
GitLab Email Scraper	Public contact emails from GitLab
Google Play Email Scraper	Public contact emails from Google Play
Hashnode Email Scraper	Public contact emails from Hashnode
HubSpot Marketplace Email Scraper	Public contact emails from HubSpot Marketplace
Hugging Face Email Scraper	Public contact emails from Hugging Face
Jira Email Scraper	Public contact emails from Jira
Maven Central Email Scraper	Public contact emails from Maven Central
Microsoft AppSource Email Scraper	Public contact emails from Microsoft AppSource
Salesforce AppExchange Email Scraper	Public contact emails from Salesforce AppExchange
Shopify App Store Email Scraper	Public contact emails from Shopify App Store
Slack App Directory Email Scraper	Public contact emails from Slack App Directory
SourceForge Email Scraper	Public contact emails from SourceForge
Unity Asset Store Email Scraper	Public contact emails from Unity Asset Store
Unreal Engine Marketplace Email Scraper	Public contact emails from Unreal Engine Marketplace
WordPress Plugin Directory Email Scraper	Public contact emails from WordPress Plugin Directory
WordPress Theme Directory Email Scraper	Public contact emails from WordPress Theme Directory
Zapier App Directory Email Scraper	Public contact emails from Zapier App Directory
App Store Email and Phone Number Scraper	Emails and phone numbers from App Store
Atlassian Marketplace Email and Phone Number Scraper	Emails and phone numbers from Atlassian Marketplace
Bitbucket Email and Phone Number Scraper	Emails and phone numbers from Bitbucket
Chrome Web Store Email and Phone Number Scraper	Emails and phone numbers from Chrome Web Store
CodePen Email and Phone Number Scraper	Emails and phone numbers from CodePen
Confluence Email and Phone Number Scraper	Emails and phone numbers from Confluence
DEV Community Email and Phone Number Scraper	Emails and phone numbers from DEV Community
Docker Hub Email and Phone Number Scraper	Emails and phone numbers from Docker Hub
Figma Community Email and Phone Number Scraper	Emails and phone numbers from Figma Community
Firefox Add-ons Email and Phone Number Scraper	Emails and phone numbers from Firefox Add-ons
GitHub Email and Phone Number Scraper	Emails and phone numbers from GitHub
GitLab Email and Phone Number Scraper	Emails and phone numbers from GitLab
Google Play Email and Phone Number Scraper	Emails and phone numbers from Google Play
Hashnode Email and Phone Number Scraper	Emails and phone numbers from Hashnode

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Support

Questions, bug reports, or a custom build of the Stack Overflow Email Scraper tuned to your own domain list? Email neurodata.apify@gmail.com.