Stack Overflow website screenshot

Stack Overflow

Stack Overflow is the world's largest question-and-answer community for developers, with over 23 million questions on programming, software development, and technology topics. Stack Overflow offers two API products: the public Stack Exchange API v2.3 for read/write access to Stack Overflow questions, answers, comments, users, tags, and badges; and the Stack Overflow for Teams API v3, a private team knowledge-base API with endpoints for questions, answers, articles, user groups, and SME management.

Stack Overflow publishes 10 APIs on the APIs.io network, including Answers API, Articles API, Badges API, and 7 more. Tagged areas include Answers, Code, Developer Community, Developer Tools, and Knowledge Base.

The Stack Overflow catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Stack Overflow’s developer surface includes authentication, engineering blog, signup flow, and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub
38.7/100 thin ▬ flat Agent 25/100 agent aware saas Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0
AccessFreemiumSelf serve⚡ Free to try
2 APIs
AnswersCodeDeveloper CommunityDeveloper ToolsKnowledge BaseProgrammingQ&AQuestionsStack Overflow

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0
Composite quality — 38.7/100 · thin
Contract Quality 10.4 / 19
Developer Ergonomics 3.6 / 15
Access Clarity 5.9 / 15
Operational Transparency 1.0 / 10
Contract Governance 2.5 / 9
Discoverability 4.6 / 8
Regulatory Posture 4.6 / 15
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 25/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Delegated User Identity 6 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.
The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/stack-overflow: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

What adopting Stack Overflow moves on the Kin Score 1

Stack Overflow is an area vendor: providers adopt it to run part of their developer surface. This is the Kin Score checks its features can move for a provider that adopts it, what each one really earns, and what it earns nothing for.

communitycapability map2 features checked 2026-09-25 · rubric v0.22.0

A Stack Overflow tag earns a provider one check, support_channel (2 points): half when declared as Community, which the pointer probe does not read, and full when declared as Support, where stackoverflow.com’s bot challenge grades as live. The tag and any Collective sit on Stack Overflow’s domain and are run by its community: new users cannot create tags, and the listed Collectives say they are “organized and managed by the Stack Overflow community”. Nothing else on the rubric moves. Stack Overflow is also undetectable, since no registry key reads it.

Developer Ergonomics1.0 of 42 pts
CheckEarnsThrough
Support channeldiscounted
Developer Ergonomics195 providers whose only support-class pointer is Community all score support_channel partial (“pointer liveness 0.5”), measured 2026-09-25.		 1.0 of 2 Technology tag and tag wiki
Across 8977 providers that publish a contract, adopting Stack Overflow would move 3701. Median lift: composite +0.0 (90th percentile +0.5), agent readiness +0.0 (+0.0). Conditional rows excluded.
What Stack Overflow ships that earns nothing (1)
  • Collectives — Articles in a Collective or on stackoverflow.com are posts on Stack Overflow’s site, not a provider blog; a Blog pointer to them would misname what they are.

A model, not a score. Adopting this vendor changes a provider's Kin Score only when the provider publishes the resulting artifacts on its own surface; nothing here writes a score, and no sponsorship or partnership can. The rating is not for sale → · Full vendor facets artifact

APIs 10

Individual APIs this provider publishes, each with its own machine-readable definition.

Stack Overflow Answers API

Operations for managing answers to questions in a Teams workspace.

Stack Overflow Articles API

Operations for managing knowledge articles in a Teams workspace.

Stack Overflow Badges API

Operations for retrieving badge information on Stack Overflow.

Stack Overflow Comments API

Operations for retrieving and writing comments on Stack Overflow posts.

Stack Overflow Questions API

Operations for managing questions in a Stack Overflow for Teams workspace.

Stack Overflow Search API

Operations for searching Stack Overflow questions and content.

Stack Overflow SMEs API

Operations for managing Subject Matter Experts (SMEs) for tags in a Teams workspace.

Stack Overflow Tags API

Operations for managing tags in a Teams workspace.

Stack Overflow User Groups API

Operations for managing user groups in a Teams workspace.

Stack Overflow Users API

Operations for managing users in a Teams workspace.

Scroll for all 10

Open Collections 13

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Stack Overflow for Teams Answers API

OPEN COLLECTION

Stack Overflow for Teams Answers Articles API

OPEN COLLECTION

Stack Overflow for Teams Answers Badges API

OPEN COLLECTION

Stack Overflow for Teams Answers Comments API

OPEN COLLECTION

Stack Overflow for Teams API

OPEN COLLECTION

Stack Overflow for Teams Answers Questions API

OPEN COLLECTION

Stack Overflow for Teams Answers Search API

OPEN COLLECTION

Stack Overflow for Teams Answers SMEs API

OPEN COLLECTION

Stack Overflow for Teams Answers Tags API

OPEN COLLECTION

Stack Overflow for Teams Answers User Groups API

OPEN COLLECTION

Stack Overflow for Teams Answers Users API

OPEN COLLECTION

Stack Overflow API

OPEN COLLECTION

Scroll for all 13

Pricing Plans 1

Published pricing tiers and plan structures.

Stack Overflow Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Stack Overflow Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Stack Overflow Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Stack Overflow Context

27 classes · 4 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Stack Overflow API Rules

5 rules · 4 warnings 1 info

SPECTRAL

Stack Overflow API Rules

9 rules · 3 errors 6 warnings

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

Stack Overflow Question

14 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Stack Overflow Question Structure

14 properties

JSON STRUCTURE

Examples 1

Example request and response payloads for these APIs.

Stack Overflow Get Questions Example

4 fields

EXAMPLE

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Stack Overflow Authentication

http/oauth2 · 2 schemes

SECURITY

Stack Overflow Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Stack Overflow Scopes

3 scopes · authorizationCode

3 scopes

SCOPES

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Stack Overflow Agentic Access

37 operations · 8 acting

37 operations · 8 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Signup
Signup

Documentation 1

Reference material describing how the API behaves

JSONSchema
JSONSchema

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

JSONLD
JSONLD
 Vocabulary
Vocabulary
 SpectralRules
SpectralRules

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication
 OAuthScopes
OAuthScopes
 Authentication
Authentication

Commercial 1

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Other 1

Properties that don't map to a standard resource type

VendorFacets
VendorFacets

Source (apis.yml)

apis.yml Raw ↑ 
aid: stack-overflow
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
specificationVersion: '0.23'
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/stack-overflow.png
name: Stack Overflow
description: 'Stack Overflow is the world''s largest question-and-answer community for developers, with over 23 million questions
  on programming, software development, and technology topics. Stack Overflow offers two API products: the public Stack Exchange
  API v2.3 for read/write access to Stack Overflow questions, answers, comments, users, tags, and badges; and the Stack Overflow
  for Teams API v3, a private team knowledge-base API with endpoints for questions, answers, articles, user groups, and SME
  management.'
url: https://raw.githubusercontent.com/api-evangelist/stack-overflow/refs/heads/main/apis.yml
tags:
- Answers
- Code
- Developer Community
- Developer Tools
- Knowledge Base
- Programming
- Q&A
- Questions
- Stack Overflow
created: '2026-05-02'
modified: '2026-05-19'
apis:
- aid: stack-overflow:stack-overflow-answers-api
  name: Stack Overflow Answers API
  description: Operations for managing answers to questions in a Teams workspace.
  humanURL: https://api.stackexchange.com/
  baseURL: https://api.stackexchange.com/2.3
  tags:
  - Answers
  properties:
  - type: OpenAPI
    url: openapi/stack-overflow-answers-api-openapi.yml
  - type: Documentation
    url: https://api.stackexchange.com/docs
  - type: TermsOfService
    url: https://stackexchange.com/legal/api-terms-of-use
  - type: RateLimits
    url: https://api.stackexchange.com/docs/throttle
  - type: Signup
    url: http://stackapps.com/apps/oauth/register
  - type: Documentation
    url: https://api.stackoverflowteams.com/docs
  - type: Blog
    url: https://stackoverflow.blog/2023/05/17/stack-overflow-for-teams-api-v3/
- aid: stack-overflow:stack-overflow-articles-api
  name: Stack Overflow Articles API
  description: Operations for managing knowledge articles in a Teams workspace.
  humanURL: https://api.stackexchange.com/
  baseURL: https://api.stackexchange.com/2.3
  tags:
  - Articles
  properties:
  - type: OpenAPI
    url: openapi/stack-overflow-articles-api-openapi.yml
  - type: Documentation
    url: https://api.stackexchange.com/docs
  - type: TermsOfService
    url: https://stackexchange.com/legal/api-terms-of-use
  - type: RateLimits
    url: https://api.stackexchange.com/docs/throttle
  - type: Signup
    url: http://stackapps.com/apps/oauth/register
  - type: Documentation
    url: https://api.stackoverflowteams.com/docs
  - type: Blog
    url: https://stackoverflow.blog/2023/05/17/stack-overflow-for-teams-api-v3/
- aid: stack-overflow:stack-overflow-badges-api
  name: Stack Overflow Badges API
  description: Operations for retrieving badge information on Stack Overflow.
  humanURL: https://api.stackexchange.com/
  baseURL: https://api.stackexchange.com/2.3
  tags:
  - Badges
  properties:
  - type: OpenAPI
    url: openapi/stack-overflow-badges-api-openapi.yml
  - type: Documentation
    url: https://api.stackexchange.com/docs
  - type: TermsOfService
    url: https://stackexchange.com/legal/api-terms-of-use
  - type: RateLimits
    url: https://api.stackexchange.com/docs/throttle
  - type: Signup
    url: http://stackapps.com/apps/oauth/register
  - type: Documentation
    url: https://api.stackoverflowteams.com/docs
  - type: Blog
    url: https://stackoverflow.blog/2023/05/17/stack-overflow-for-teams-api-v3/
- aid: stack-overflow:stack-overflow-comments-api
  name: Stack Overflow Comments API
  description: Operations for retrieving and writing comments on Stack Overflow posts.
  humanURL: https://api.stackexchange.com/
  baseURL: https://api.stackexchange.com/2.3
  tags:
  - Comments
  properties:
  - type: OpenAPI
    url: openapi/stack-overflow-comments-api-openapi.yml
  - type: Documentation
    url: https://api.stackexchange.com/docs
  - type: TermsOfService
    url: https://stackexchange.com/legal/api-terms-of-use
  - type: RateLimits
    url: https://api.stackexchange.com/docs/throttle
  - type: Signup
    url: http://stackapps.com/apps/oauth/register
  - type: Documentation
    url: https://api.stackoverflowteams.com/docs
  - type: Blog
    url: https://stackoverflow.blog/2023/05/17/stack-overflow-for-teams-api-v3/
- aid: stack-overflow:stack-overflow-questions-api
  name: Stack Overflow Questions API
  description: Operations for managing questions in a Stack Overflow for Teams workspace.
  humanURL: https://api.stackexchange.com/
  baseURL: https://api.stackexchange.com/2.3
  tags:
  - Questions
  properties:
  - type: OpenAPI
    url: openapi/stack-overflow-questions-api-openapi.yml
  - type: Documentation
    url: https://api.stackexchange.com/docs
  - type: TermsOfService
    url: https://stackexchange.com/legal/api-terms-of-use
  - type: RateLimits
    url: https://api.stackexchange.com/docs/throttle
  - type: Signup
    url: http://stackapps.com/apps/oauth/register
  - type: Documentation
    url: https://api.stackoverflowteams.com/docs
  - type: Blog
    url: https://stackoverflow.blog/2023/05/17/stack-overflow-for-teams-api-v3/
- aid: stack-overflow:stack-overflow-search-api
  name: Stack Overflow Search API
  description: Operations for searching Stack Overflow questions and content.
  humanURL: https://api.stackexchange.com/
  baseURL: https://api.stackexchange.com/2.3
  tags:
  - Search
  properties:
  - type: OpenAPI
    url: openapi/stack-overflow-search-api-openapi.yml
  - type: Documentation
    url: https://api.stackexchange.com/docs
  - type: TermsOfService
    url: https://stackexchange.com/legal/api-terms-of-use
  - type: RateLimits
    url: https://api.stackexchange.com/docs/throttle
  - type: Signup
    url: http://stackapps.com/apps/oauth/register
  - type: Documentation
    url: https://api.stackoverflowteams.com/docs
  - type: Blog
    url: https://stackoverflow.blog/2023/05/17/stack-overflow-for-teams-api-v3/
- aid: stack-overflow:stack-overflow-smes-api
  name: Stack Overflow SMEs API
  description: Operations for managing Subject Matter Experts (SMEs) for tags in a Teams workspace.
  humanURL: https://api.stackexchange.com/
  baseURL: https://api.stackexchange.com/2.3
  tags:
  - Small Business
  tags_raw:
  - SMEs
  - SME
  properties:
  - type: OpenAPI
    url: openapi/stack-overflow-smes-api-openapi.yml
  - type: Documentation
    url: https://api.stackexchange.com/docs
  - type: TermsOfService
    url: https://stackexchange.com/legal/api-terms-of-use
  - type: RateLimits
    url: https://api.stackexchange.com/docs/throttle
  - type: Signup
    url: http://stackapps.com/apps/oauth/register
  - type: Documentation
    url: https://api.stackoverflowteams.com/docs
  - type: Blog
    url: https://stackoverflow.blog/2023/05/17/stack-overflow-for-teams-api-v3/
- aid: stack-overflow:stack-overflow-tags-api
  name: Stack Overflow Tags API
  description: Operations for managing tags in a Teams workspace.
  humanURL: https://api.stackexchange.com/
  baseURL: https://api.stackexchange.com/2.3
  tags:
  - Tags
  properties:
  - type: OpenAPI
    url: openapi/stack-overflow-tags-api-openapi.yml
  - type: Documentation
    url: https://api.stackexchange.com/docs
  - type: TermsOfService
    url: https://stackexchange.com/legal/api-terms-of-use
  - type: RateLimits
    url: https://api.stackexchange.com/docs/throttle
  - type: Signup
    url: http://stackapps.com/apps/oauth/register
  - type: Documentation
    url: https://api.stackoverflowteams.com/docs
  - type: Blog
    url: https://stackoverflow.blog/2023/05/17/stack-overflow-for-teams-api-v3/
- aid: stack-overflow:stack-overflow-user-groups-api
  name: Stack Overflow User Groups API
  description: Operations for managing user groups in a Teams workspace.
  humanURL: https://api.stackexchange.com/
  baseURL: https://api.stackexchange.com/2.3
  tags:
  - User Groups
  properties:
  - type: OpenAPI
    url: openapi/stack-overflow-user-groups-api-openapi.yml
  - type: Documentation
    url: https://api.stackexchange.com/docs
  - type: TermsOfService
    url: https://stackexchange.com/legal/api-terms-of-use
  - type: RateLimits
    url: https://api.stackexchange.com/docs/throttle
  - type: Signup
    url: http://stackapps.com/apps/oauth/register
  - type: Documentation
    url: https://api.stackoverflowteams.com/docs
  - type: Blog
    url: https://stackoverflow.blog/2023/05/17/stack-overflow-for-teams-api-v3/
- aid: stack-overflow:stack-overflow-users-api
  name: Stack Overflow Users API
  description: Operations for managing users in a Teams workspace.
  humanURL: https://api.stackexchange.com/
  baseURL: https://api.stackexchange.com/2.3
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/stack-overflow-users-api-openapi.yml
  - type: Documentation
    url: https://api.stackexchange.com/docs
  - type: TermsOfService
    url: https://stackexchange.com/legal/api-terms-of-use
  - type: RateLimits
    url: https://api.stackexchange.com/docs/throttle
  - type: Signup
    url: http://stackapps.com/apps/oauth/register
  - type: Documentation
    url: https://api.stackoverflowteams.com/docs
  - type: Blog
    url: https://stackoverflow.blog/2023/05/17/stack-overflow-for-teams-api-v3/
common:
- type: VendorFacets
  url: vendor-facets/stack-overflow-vendor-facets.yml
- type: AgenticAccess
  url: agentic-access/stack-overflow-agentic-access.yml
- type: DomainSecurity
  url: security/stack-overflow-domain-security.yml
- type: Authentication
  url: authentication/stack-overflow-authentication.yml
- type: OAuthScopes
  url: scopes/stack-overflow-scopes.yml
- type: GitHubOrganization
  url: https://github.com/stackexchange
- type: LinkedIn
  url: https://www.linkedin.com/company/stack-overflow
- url: https://stackoverflow.com
  type: Website
- url: https://stackoverflow.blog/
  type: Blog
- url: https://api.stackexchange.com/docs/authentication
  type: Authentication
- url: http://stackapps.com/apps/oauth/register
  type: Signup
- url: https://stackexchange.com/legal/api-terms-of-use
  type: TermsOfService
- url: json-ld/stack-overflow-context.jsonld
  type: JSONLD
- url: json-schema/stack-overflow-question-schema.json
  type: JSONSchema
- url: vocabulary/stack-overflow-vocabulary.yml
  type: Vocabulary
- url: rules/stack-overflow-rules.yml
  type: SpectralRules

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