# Component Model

**Canonical:** https://apis.io/providers/component-model/  
**Website:** https://component-model.bytecodealliance.org/  
**APIs profiled:** 4

The WebAssembly Component Model is a broad-reaching architecture for building interoperable WebAssembly libraries, applications, and environments. It defines components as portable, sandboxed units of code that can compose with each other across language and runtime boundaries. The model introduces interfaces, worlds, and the WebAssembly Interface Type (WIT) language, along with a canonical ABI, binary and text formats, and a concurrency model. The Component Model underpins the WebAssembly System Interface (WASI) Preview 2 and is the foundation for portable Wasm on browsers, servers, edge, and embedded environments.

## Kin Score — 15.3 / 100 (emerging)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 15.3).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 16.7 |
| Commercial Clarity | 15.8 |
| Access Clarity | 15.8 |

## Agent readiness — 3.0 (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 |

## Access

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

## APIs (4)

- **WebAssembly Component Model Specification** — The Component Model specification repository under the W3C WebAssembly Community Group. Contains design documents, the formal specification drafts, the WIT grammar, the canonica...
- **WebAssembly Interface Type (WIT)** — WIT is the interface definition language for the Component Model. WIT describes the imports and exports of a component using interfaces and worlds. WIT is consumed by language t...
- **WebAssembly System Interface Preview 2** — WASI Preview 2 is the first WASI release built on the Component Model. It defines a set of interfaces such as wasi:filesystem, wasi:io, wasi:http, wasi:cli, and wasi:sockets tha...
- **Component Model Implementations** — A landscape of toolchains and runtimes that implement the Component Model, including Wasmtime, Jco, wit-bindgen language bindings, cargo-component for Rust, ComponentizeJS, and ...

## Security (1)

- **Component Model Domain Security** — TLSv1.3 · HSTS · DNSSEC

## Plans (1)

- **Component Model Plans Pricing**

## Tags

ABI, Bytecode Alliance, Component, Interfaces, Modular, Specification, WASI, WebAssembly, WIT, World

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