# Bun

**Canonical:** https://apis.io/providers/bun/  
**Website:** https://bun.com  
**APIs profiled:** 0

Bun is a fast, all-in-one JavaScript and TypeScript toolkit built by Oven (oven-sh). A single self-contained binary bundles a Node.js-compatible runtime, a package manager (a drop-in, dramatically faster replacement for npm/yarn/pnpm), a native bundler and single-file executable compiler, and a Jest-compatible test runner. Bun is designed as an incrementally adoptable drop-in replacement for Node.js, emphasizing startup speed, install speed, and elegant built-in APIs. It is open source, distributed as a binary via an install script, Homebrew, Docker, and npm, and is surfaced here as a Kleiner Perkins portfolio company. Bun exposes no hosted REST API; the CLI and the runtime/bundler APIs are the developer surface.

## Kin Score — 20.0 / 100 (emerging)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 20.0).

| Facet | Score |
|---|---|
| Discoverability | 57.4 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 18.4 |
| Developer Ergonomics | 59.5 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

## Agent readiness — 0.0 (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 | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## Security (1)

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

## Tags

Company, Developer Tools, JavaScript, TypeScript, Runtime, Package Manager, Bundler, Test Runner

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