ContextSDK

ContextSDK is an on-device context intelligence layer for mobile apps, founded by Felix Krause and Dieter Rappold and backed by Speedinvest. Its SDK processes 300+ real-world device signals (accelerometer, gyroscope, motion, screen state, ambient signals) through on-device machine learning to determine what a user is doing in the moment — commuting, relaxing, working, or being active — within seconds of app launch, with no PII collected and a ~0.6 MB footprint. Two products build on this: ContextDecision for intelligent timing of in-app actions and messages, and ContextPush for context-aware push notification delivery. ContextSDK ships native clients for iOS (Swift), Flutter, React Native, and Unity, with Android in beta, and is SOC 2 Type 2 certified and GDPR compliant.

ContextSDK is profiled on the APIs.io network. Tagged areas include Company, Mobile, SDK, On-Device, and Context.

ContextSDK’s developer surface includes documentation, API reference, getting-started guide, engineering blog, signup flow, support, authentication, and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub

29.5/100 thin ▬ flat Agent 3/100 human only saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Mobile SDK On-Device Context Machine-Learning Push Notifications Privacy iOS Analytics

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 29.5/100 · thin

Contract Quality 0.0 / 25

Developer Ergonomics 12.9 / 20

Access Clarity 6.3 / 20

Operational Transparency 2.4 / 13

Contract Governance 2.2 / 12

Discoverability 5.7 / 10

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 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 0 / 7

Rate-Limit Signaling 0 / 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 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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/contextsdk: 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 →

Security Posture 3

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

Contextsdk Authentication

apiKey · 1 scheme

SECURITY

Contextsdk Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Contextsdk Trust Center

SOC 2 Type 2, GDPR

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Lifecycle

Lifecycle

Conformance

Conformance

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 4

Authentication, authorization, and security posture

Authentication

Compliance

TrustCenter

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

ChangeLog

ChangeLog

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: contextsdk
name: ContextSDK
description: 'ContextSDK is an on-device context intelligence layer for mobile apps, founded by Felix Krause and Dieter Rappold
  and backed by Speedinvest. Its SDK processes 300+ real-world device signals (accelerometer, gyroscope, motion, screen state,
  ambient signals) through on-device machine learning to determine what a user is doing in the moment — commuting, relaxing,
  working, or being active — within seconds of app launch, with no PII collected and a ~0.6 MB footprint. Two products build
  on this: ContextDecision for intelligent timing of in-app actions and messages, and ContextPush for context-aware push notification
  delivery. ContextSDK ships native clients for iOS (Swift), Flutter, React Native, and Unity, with Android in beta, and is
  SOC 2 Type 2 certified and GDPR compliant.'
url: https://raw.githubusercontent.com/api-evangelist/contextsdk/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- speedinvest
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
image: https://contextsdk.com/favicon.ico
tags:
- Company
- Mobile
- SDK
- On-Device
- Context
- Machine-Learning
- Push Notifications
- Privacy
- iOS
- Analytics
tags_raw:
- Company
- Mobile
- SDK
- On-Device
- Context
- Machine Learning
- Push Notifications
- Privacy
- iOS
- Analytics
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://contextsdk.com
- type: DeveloperPortal
  url: https://docs.contextsdk.com
- type: Documentation
  url: https://docs.contextsdk.com
- type: APIReference
  url: https://context-sdk.github.io/docs-ios/documentation/contextsdk/
- type: GettingStarted
  url: https://docs.contextsdk.com/basics/getting-started
- type: Blog
  url: https://contextsdk.com/blog
- type: GitHubOrganization
  url: https://github.com/context-sdk
- type: SignUp
  url: https://dashboard.contextsdk.com/login
- type: Support
  url: mailto:support@contextsdk.com
- type: PrivacyPolicy
  url: https://contextsdk.com/privacy-policy
- type: Packages
  url: packages/contextsdk-packages.yml
- type: SDKs
  url: packages/contextsdk-packages.yml
- type: Authentication
  url: authentication/contextsdk-authentication.yml
- type: Lifecycle
  url: lifecycle/contextsdk-lifecycle.yml
- type: ChangeLog
  url: changelog/contextsdk-changelog.yml
- type: Conformance
  url: conformance/contextsdk-conformance.yml
- type: Compliance
  url: https://contextsdk.com/company/privacy-security
- type: TrustCenter
  url: https://trust.contextsdk.com/
- type: DomainSecurity
  url: security/contextsdk-domain-security.yml
- type: LLMsTxt
  url: llms/contextsdk-llms.txt
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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