Zephyr Project website screenshot

Zephyr Project

The Zephyr Project is a Linux Foundation project that delivers a small, scalable, secure, and open-source real-time operating system (RTOS) for resource-constrained embedded devices. Zephyr supports 1000+ boards across ARM Cortex, RISC-V, ARC, x86, Xtensa, and other architectures, ships with a C kernel, device drivers, networking stacks (BLE, Wi-Fi, Thread, Matter), security subsystems, and is supported by a meta-tool (west), an SDK (sdk-ng), and a broad ecosystem of training partners and commercial silicon and module vendors.

Zephyr Project publishes 3 APIs on the APIs.io network. Tagged areas include Embedded, IoT, Linux Foundation, RTOS, and Open-Source.

The Zephyr Project catalog on APIs.io includes 1 JSON-LD context.

Zephyr Project’s developer surface includes developer portal, documentation, API reference, getting-started guide, CLI, engineering blog, release notes, and 18 more developer resources.

36.0/100 thin ▬ flat Agent 3/100 human only open core · Apache-2.0 Full breakdown ↓
scored 2026-09-14 · rubric v0.22.0
AccessFreemium
3 APIs
EmbeddedIoTLinux FoundationRTOSOpen-SourceEdge

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-14 · rubric v0.22.0
Open Source Surface applies to this provider. This product is open source and we read its repository directly, so Open Source Surface carries 10 points of the composite. It is scored from what the repository actually publishes — a security policy, a contribution guide, a release history, a code of conduct — read live from the provider rather than inferred from our own catalog pointers. This facet adds; nothing was taken away to make room for it. An open-source project is not excused from the commercial facets, because exemption would strip it of the points it does earn. If we have the wrong repository, or this product is not open source, say so on your provider repo and we will drop the facet rather than have you publish against it.
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.
The six quality facets above are damped to 90 points between them, because the conditional facet above carries the other 10. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 90% 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/zephyr: 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 →

APIs 3

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

Zephyr RTOS Kernel API

The Zephyr kernel C API exposes scheduling, threading, synchronization, memory management, and timer services for real-time embedded applications. It is the foundation that devi...

Zephyr Device Driver API

The Zephyr device driver subsystem exposes a uniform device model across GPIO, I2C, SPI, UART, ADC, sensors, displays, networking, USB, Bluetooth, and many other peripheral clas...

Zephyr Networking API

The Zephyr networking stack exposes BSD-like sockets, TLS/DTLS, MQTT, CoAP, LWM2M, HTTP, WebSocket, gRPC, and connectivity layers including IPv4/IPv6, Wi-Fi, Thread, OpenThread,...

Pricing Plans 1

Published pricing tiers and plan structures.

Zephyr Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Zephyr Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Semantic Vocabularies 1

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

Zephyr Context

18 classes · 0 properties

JSON-LD

Security Posture 1

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

Zephyr Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Documentation 3

Reference material describing how the API behaves

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Build 5

SDKs, sample code, and the tooling you integrate with

Access & Security 2

Authentication, authorization, and security posture

Learn 1

Tutorials, courses, talks, and written guidance

Operate 3

Status, limits, changes, and where to get help

Commercial 3

Pricing, plans, and the legal terms of use

Company 3

The organization behind the API

Other 2

Properties that don't map to a standard resource type

Source (apis.yml)

apis.yml Raw ↑
aid: zephyr
name: Zephyr Project
description: The Zephyr Project is a Linux Foundation project that delivers a small, scalable, secure, and open-source real-time
  operating system (RTOS) for resource-constrained embedded devices. Zephyr supports 1000+ boards across ARM Cortex, RISC-V,
  ARC, x86, Xtensa, and other architectures, ships with a C kernel, device drivers, networking stacks (BLE, Wi-Fi, Thread,
  Matter), security subsystems, and is supported by a meta-tool (west), an SDK (sdk-ng), and a broad ecosystem of training
  partners and commercial silicon and module vendors.
type: Index
deliveryModel:
  model: open-core
  license: Apache-2.0
  open_source: true
  commercial: true
  callable_host: false
  label: Open core · an OSS project plus a commercial hosted product
  confidence: high
  source:
  - license
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
position: Consuming
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/zephyr.png
tags:
- Embedded
- IoT
- Linux Foundation
- RTOS
- Open-Source
- Edge
tags_raw:
- Embedded
- IoT
- Linux Foundation
- RTOS
- Open Source
- Edge
created: '2026-03-16'
modified: '2026-05-03'
url: https://raw.githubusercontent.com/api-evangelist/zephyr/refs/heads/main/apis.yml
specificationVersion: '0.23'
apis:
- aid: zephyr:zephyr-kernel-api
  name: Zephyr RTOS Kernel API
  description: The Zephyr kernel C API exposes scheduling, threading, synchronization, memory management, and timer services
    for real-time embedded applications. It is the foundation that device drivers and application code build on.
  humanURL: https://docs.zephyrproject.org/latest/kernel/index.html
  tags:
  - RTOS
  - Embedded
  - Kernel
  properties:
  - type: Documentation
    url: https://docs.zephyrproject.org/latest/kernel/index.html
  - type: APIReference
    url: https://docs.zephyrproject.org/apidoc/latest/index.html
  - type: GettingStarted
    url: https://docs.zephyrproject.org/latest/develop/getting_started/index.html
  - type: GitHubRepository
    url: https://github.com/zephyrproject-rtos/zephyr
- aid: zephyr:zephyr-device-driver-api
  name: Zephyr Device Driver API
  description: The Zephyr device driver subsystem exposes a uniform device model across GPIO, I2C, SPI, UART, ADC, sensors,
    displays, networking, USB, Bluetooth, and many other peripheral classes, configured through Devicetree and Kconfig.
  humanURL: https://docs.zephyrproject.org/latest/build/dts/index.html
  tags:
  - Drivers
  - Devicetree
  - Embedded
  properties:
  - type: Documentation
    url: https://docs.zephyrproject.org/latest/hardware/index.html
  - type: APIReference
    url: https://docs.zephyrproject.org/apidoc/latest/group__io__interfaces.html
- aid: zephyr:zephyr-networking-api
  name: Zephyr Networking API
  description: The Zephyr networking stack exposes BSD-like sockets, TLS/DTLS, MQTT, CoAP, LWM2M, HTTP, WebSocket, gRPC, and
    connectivity layers including IPv4/IPv6, Wi-Fi, Thread, OpenThread, Matter, and BLE.
  humanURL: https://docs.zephyrproject.org/latest/connectivity/networking/index.html
  tags:
  - Networking
  - IoT
  - Connectivity
  properties:
  - type: Documentation
    url: https://docs.zephyrproject.org/latest/connectivity/networking/index.html
common:
- type: Website
  url: https://www.zephyrproject.org/
- type: IssueTracker
  url: https://github.com/zephyrproject-rtos/zephyr/issues
- type: Releases
  url: https://github.com/zephyrproject-rtos/zephyr/releases
- type: CodeOfConduct
  url: https://github.com/zephyrproject-rtos/zephyr/blob/main/CODE_OF_CONDUCT.md
- type: ContributionGuide
  url: https://github.com/zephyrproject-rtos/zephyr/blob/main/CONTRIBUTING.rst
- type: License
  name: Apache-2.0
  url: https://github.com/zephyrproject-rtos/zephyr/blob/main/LICENSE
- type: DomainSecurity
  url: security/zephyr-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/the-zephyr-project
- type: Portal
  name: Zephyr Project
  url: https://www.zephyrproject.org/
- type: Documentation
  name: Zephyr Project Documentation
  url: https://docs.zephyrproject.org/latest/
- type: APIReference
  name: Zephyr API Reference
  url: https://docs.zephyrproject.org/apidoc/latest/index.html
- type: GettingStarted
  name: Zephyr Getting Started Guide
  url: https://docs.zephyrproject.org/latest/develop/getting_started/index.html
- type: GitHubOrganization
  name: Zephyr Project on GitHub
  url: https://github.com/zephyrproject-rtos
- type: GitHubRepository
  name: Zephyr Primary Git Repository
  url: https://github.com/zephyrproject-rtos/zephyr
- type: SDKs
  name: Zephyr SDK (sdk-ng)
  url: https://github.com/zephyrproject-rtos/sdk-ng
- type: CLI
  name: West - Zephyr's Meta-Tool
  url: https://github.com/zephyrproject-rtos/west
- type: Blog
  name: Zephyr Project Blog
  url: https://www.zephyrproject.org/blog/
- type: ReleaseNotes
  name: Zephyr Release Notes
  url: https://docs.zephyrproject.org/latest/releases/index.html
- type: Training
  name: Zephyr Training Partner Program
  url: https://www.zephyrproject.org/training-partner-program/
- type: Events
  name: Zephyr Events
  url: https://www.zephyrproject.org/events/
- type: Compliance
  name: Zephyr Security
  url: https://docs.zephyrproject.org/latest/security/index.html
- type: TermsOfService
  name: Linux Foundation Terms of Use
  url: https://www.linuxfoundation.org/terms
- type: PrivacyPolicy
  name: Linux Foundation Privacy Policy
  url: https://www.linuxfoundation.org/privacy-policy/
- type: JSONLD
  name: Zephyr JSON-LD Context
  url: json-ld/zephyr-context.jsonld
- type: Resources
  name: Zephyr Vocabulary
  url: vocabulary/zephyr-vocabulary.yml
maintainers:
- FN: Kin Lane
  email: info@apievangelist.com

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