# opencalendar

> opencalendar — nchemb-opencalendar. Use this tool when you need to manage bookings and schedule appointments with AI agents, solving problems of availability and synchronization. It integrates with Google Calendar and Stripe, allowing agents to check availability and book time slots through a REST API or embeds. Ideal for self-hosted applications requiring automated booking capabilities.

Canonical page: https://skillsregistry.net/skills/nchemb-opencalendar  
JSON: https://api.skillsregistry.net/v1/skills/nchemb-opencalendar

## Description

The open-source Calendly alternative that AI agents can book. Keyless MCP server + llms.txt so any agent can check your availability and book you. Self-hosted, real Google Calendar, Stripe, embeds, REST API.

## Trust

- **Trust score (0–1):** 0.71
- **Verification tier:** verified
- **Last scanned:** 2026-09-28

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** container
- **Runtime environment:** vm
- **License:** MIT
- **Updated:** 2026-09-28

## Source

- **Source listing:** [GitHub](https://github.com/nchemb/opencalendar)

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "nchemb-opencalendar"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/nchemb-opencalendar` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/nchemb-opencalendar/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt