# Kamal

**Canonical:** https://apis.io/providers/kamal-deploy/  
**Website:** https://kamal-deploy.org  
**APIs profiled:** 2

Kamal is an open-source deployment tool from 37signals (DHH / Basecamp) for deploying containerized web applications to any infrastructure — bare metal, cloud VMs, or a mix — with zero-downtime rolling restarts. Originally built for Rails apps, Kamal works with any web application that can be packaged as a Docker container. It uses SSHKit to drive remote commands over SSH and pairs with kamal-proxy, a lightweight HTTP proxy written in Go that seamlessly switches request traffic between old and new containers during a deploy. Kamal is imperative and Capistrano-like in feel, with a single `config/deploy.yml` describing servers, image, registry, accessories, env, secrets, and proxy/SSL settings. Capabilities include auto-provisioning Docker on new servers, remote builds, asset bridging, accessory services (databases, Redis, cron sidecars), automatic TLS via Let's Encrypt, host- and path-based routing, and hooks for custom pre/post-deploy logic. Kamal is the operational backbone of 37signals' on-premises exit from major cloud providers and powers their ONCE product line. Kamal itself is a CLI tool, not a hosted service — there is no public REST API, no SDK, and no paid tier. The project is released under the MIT License and developed openly on GitHub under the `basecamp` organization.

## Kin Score — 15.9 / 100 (emerging)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 15.9).

| Facet | Score |
|---|---|
| Discoverability | 59.3 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 18.4 |
| Developer Ergonomics | 38.1 |
| 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 |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

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

## APIs (2)

- **Kamal CLI** — The Kamal CLI (`kamal`) is the primary command-line interface for packaging, shipping, and operating containerized web apps across one or more SSH-reachable servers. It reads `c...
- **Kamal Proxy** — Kamal Proxy is a minimal HTTP reverse proxy written in Go that powers the zero-downtime deploy switchover behind Kamal. It exposes a small `kamal-proxy` CLI with `run`, `deploy`...

## Security (1)

- **Kamal Deploy Domain Security** — TLSv1.3

## Tags

Deployment, DevOps, Docker, Containers, Zero Downtime, Rolling Deploys, Rails, Ruby, Open-Source, 37signals, Basecamp, On-Premises, Infrastructure, CLI, SSH

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