# Radicale

**Canonical:** https://apis.io/providers/radicale/  
**Website:** https://radicale.org/  
**APIs profiled:** 1

Radicale provides a simple, open-source CalDAV and CardDAV server for calendars and contacts. It is lightweight, written in Python, and aims to be easy to install and configure, supporting multiple users and authentication methods. The project focuses on interoperability with various clients and offers a straightforward solution for personal and small‑team scheduling needs.

## Kin Score — 7.6 / 100 (minimal)

Scored 2026-10-31 under rubric 0.25.0.

| Facet | Score |
|---|---|
| Discoverability | 53.6 |
| Contract Quality | 0.0 |
| Contract Governance | 18.2 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 7.1 |
| Access Clarity | 0.0 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 5.9 (matched via fallback).

## Agent readiness — 5.6 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | documented |
| 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 |
| Pagination Ratio | na |
| Operation Distinctiveness | na |

## APIs (1)

- **Radicale API** — Radicale is a small but powerful CalDAV (calendars, to‑do lists) and CardDAV (contacts) server offering calendar and contact synchronization via standard protocols.

## Security (2)

- **Radicale Authentication** — 9 schemes
- **Radicale Domain Security** — TLSv1.3

## Tags

Company, CalDAV, CardDAV, OpenSource, Python, Calendar

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