# Linux

**Canonical:** https://apis.io/providers/linux/  
**Website:** https://www.kernel.org/  
**APIs profiled:** 10

Linux is an open-source Unix-like operating system kernel originally created by Linus Torvalds. This index catalogs the userspace and kernel programming interfaces exposed by Linux, including system calls, eBPF, ioctl, netlink, procfs, sysfs, GPIO, and security interfaces such as Seccomp, Landlock, and Linux Security Modules. It also covers ecosystem APIs for systemd and PAM.

## Kin Score — 14.0 / 100 (emerging)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 14.0).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 7.9 |
| Developer Ergonomics | 16.7 |
| Commercial Clarity | 15.8 |
| Access Clarity | 15.8 |

## Agent readiness — 2.5 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Freemium — onboarding: unknown, pricing: freemium, trial: no (confidence: medium).

## APIs (10)

- **Linux Kernel Userspace API** — The set of stable userspace-facing interfaces exposed by the Linux kernel, including system calls, ioctls, eBPF, futex2, and the netlink protocol.
- **eBPF Userspace API** — Extended Berkeley Packet Filter (eBPF) userspace API for loading and interacting with sandboxed programs running in the kernel.
- **Netlink API** — Socket-based interface for communication between the kernel and userspace, used widely for networking, routing, and device configuration.
- **Seccomp BPF** — SECure COMPuting mode with BPF filters, used to restrict which system calls a process can make for sandboxing and hardening.
- **Landlock** — Unprivileged access-control framework allowing processes to restrict themselves and their descendants from filesystem and network operations.
- **procfs** — Virtual filesystem mounted at /proc that exposes process and kernel information through a file-based interface.
- **sysfs** — Virtual filesystem mounted at /sys that exports kernel object and device information to userspace.
- **systemd D-Bus API** — The system and service manager API exposed by systemd over D-Bus for managing units, services, and the boot process.
- **Linux PAM** — Pluggable Authentication Modules providing flexible, configurable authentication mechanisms for Linux applications.
- **udev** — Device manager for the Linux kernel handling device nodes and hotplug events under /dev.

## Security (1)

- **Linux Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Linux Plans Pricing**

## Tags

Kernel, Linux, Open-Source, Operating System, Unix, Userspace API

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/linux/). Scores are computed from the provider's own public artifacts under a published rubric.