Stack Exchange Data API
9 dedicated endpoints covering questions, answers, comments, tags, and user profiles across 170+ Stack Exchange sites — including Stack Overflow, Super User, Server Fault, Ask Ubuntu, and the full network.
What Stack Exchange Unlocks
Stack Exchange is the largest structured knowledge network for technical communities: Stack Overflow for programming, Super User for computing, Server Fault for sysadmins, Ask Ubuntu, Security, Data Science, and 170+ others. The questions, answers, and discussions represent years of expert validation — exactly the signal needed for technical research, content grounding, and developer intelligence. These endpoints expose that knowledge as structured JSON, with a site parameter that routes any call to the right community.
All Stack Exchange Endpoints
All endpoints use POST with a JSON body and an access-token header. The site parameter is required on every call — pass the site slug (e.g. stackoverflow, superuser, askubuntu). Base URL: https://api.anysite.io.
Questions family
| Endpoint | What It Returns | Cost |
|---|---|---|
/api/stackexchange/questions | Question detail by ID: title, body, tags, score, view count, answer count, accepted answer ID, author | 1 credit |
/api/stackexchange/questions/search | Full-text question search: matching questions with title, ID, score, tags, view count, author | 1 credit |
/api/stackexchange/questions/answers | Answers for a question by ID: answer body, score, accepted status, author, creation date | 1 credit |
/api/stackexchange/questions/comments | Comments on a question: comment body, score, author, creation date | 1 credit |
Answers, Tags, Users
| Endpoint | What It Returns | Cost |
|---|---|---|
/api/stackexchange/answers | Answer detail by ID: body, score, accepted status, question ID, author | 1 credit |
/api/stackexchange/tags | Tag listing for a site: tag name, usage count, moderator-only flag, synonyms flag | 1 credit |
/api/stackexchange/users | User profile by ID: display name, reputation, badge counts (gold/silver/bronze), location, website | 1 credit |
/api/stackexchange/users/questions | Questions asked by a user: title, ID, score, answer count, accepted status, tags | 1 credit |
/api/stackexchange/users/answers | Answers written by a user: answer ID, question ID, score, accepted status | 1 credit |
What You Can Build
Technical Q&A Intelligence
Search any topic across the network with questions/search, then pull the full thread — question body, accepted answer, all answers, and comments — via three more calls. Ideal for grounding documentation, support content, or developer-facing blog posts in community-validated answers.
Expert and Contributor Discovery
Identify high-reputation contributors in any technical domain with users. Chain to users/answers to see what problems they've solved and users/questions to understand what they struggle with. Badge counts and reputation scores give instant authority signals.
Community Vocabulary Mapping
tags returns the complete tag taxonomy for any Stack Exchange site — the most-used terms, niche subtopics, and how the community actually names concepts. Use it to align content, SEO keywords, and product messaging with technical vocabulary that developers use.
Multi-Site Coverage
One API, 170+ communities. A single integration covers Stack Overflow (programming), Super User (computing), Server Fault (sysadmins), Ask Ubuntu, Security, Data Science, Cross Validated (stats), Mathematics, Physics, and any other Stack Exchange community — all via the site parameter.
Common Workflows
# 1. Find top questions on a topic anysite api /api/stackexchange/questions/search query="vector database indexing" site=stackoverflow count=10 # 2. Pull the full question (including body) anysite api /api/stackexchange/questions id=74842150 site=stackoverflow # 3. Get all answers with scores anysite api /api/stackexchange/questions/answers id=74842150 site=stackoverflow count=10 # 4. Pull the accepted answer in detail anysite api /api/stackexchange/answers id=74842312 site=stackoverflow
# 1. Search for questions on a topic, look at top answerers anysite api /api/stackexchange/questions/search query="Kubernetes operator" site=stackoverflow count=5 # 2. Pull user profile (reputation, badges, location) anysite api /api/stackexchange/users id=1234567 site=stackoverflow # 3. See what they've answered (their domain expertise) anysite api /api/stackexchange/users/answers id=1234567 site=stackoverflow count=20 # 4. See what they ask (what challenges them) anysite api /api/stackexchange/users/questions id=1234567 site=stackoverflow count=10
# List top tags on Stack Overflow anysite api /api/stackexchange/tags site=stackoverflow count=50 # Same for a specialist community anysite api /api/stackexchange/tags site=datascience count=30 # Or security.stackexchange.com anysite api /api/stackexchange/tags site=security count=30
Stack Exchange Sites
Pass the site slug as the site parameter. Common sites:
| Site Slug | Community |
|---|---|
stackoverflow | Programming and software development |
superuser | Computing, hardware, and software for power users |
serverfault | System and network administration |
askubuntu | Ubuntu Linux |
security | Information security and cryptography |
datascience | Data science, machine learning, and data engineering |
stats | Statistics and data analysis (Cross Validated) |
math | Mathematics |
physics | Physics |
dba | Database administration |
Pricing
Credits are shared across all Anysite endpoints. Every Stack Exchange endpoint costs 1 credit per call.
| Use Case | Typical Calls | Approx. Cost |
|---|---|---|
| Full question thread (question + answers + comments) | 3 calls | 3 credits |
| Topic research batch (10 questions + accepted answers) | 20 calls | 20 credits |
| Expert profile (user + 20 answers + 10 questions) | 3 calls | 3 credits |
| Tag taxonomy (1 site) | 1 call | 1 credit |
Frequently Asked Questions
site parameter with the site's slug. For Stack Overflow use stackoverflow, for Super User use superuser, for Ask Ubuntu use askubuntu. The full list of sites and slugs is available in the Stack Exchange API documentation.questions/search to find questions by keyword — it returns the numeric ID for each result. You can also extract the ID from any Stack Exchange URL: stackoverflow.com/questions/74842150/... → ID is 74842150.access-token header with your Anysite API key. This is not a Bearer token — pass it directly as the access-token header value. Get your key at anysite.io/pricing.site parameter routes each call to a specific community. To cover multiple sites, make one call per site and aggregate the results. The 170+ sites share the same endpoint interface, so the pattern is consistent.questions/answers returns all answers for a given question (you pass the question ID). answers returns the detail of a single answer by its own answer ID. Use questions/answers when you want all responses to a question; use answers when you have a specific answer ID (e.g. the accepted answer ID returned from a question).Related Endpoints
Start pulling Stack Exchange data
Structured access to technical Q&A, expert profiles, and community knowledge across 170+ sites — one API call at a time.