Agent-Native Calendar
Agent-Native Google Calendar - manage events, sync, and public booking
Runs in the cloud
42min
Overview
Description from the maker (original English)
Scheduling for AI assistants: bookings, availability, meeting polls and routing forms.
PopNx MCP’s three pillars
These three are never merged into one score: opinions, measurements and popularity are different things.
- User voiceiNo reviews yetReviews open together with accounts in a later step
- Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
- UsageiVery new★ –
What you can do with it
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
- Connection: Runs in the cloud
- Transport: Streamable HTTP
- Category: Docs, sheets & office work
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 1 of 1 passed
- Runs on the maker’s server: what you ask it goes through their server.
- The registry lists no key to fill in.
You need
- Runs in the cloudNothing to install; it connects over the internet
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Works in Claude on the web, desktop and mobile:
- Open Settings → Connectors
- Press Add custom connector
- Paste the address below and press Add
- If it asks you to sign in, sign in with the maker
https://api.42min.us/mcpRun this in your terminal
claude mcp add --transport http meetings https://api.42min.us/mcpOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"meetings": {
"url": "https://api.42min.us/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"meetings": {
"type": "http",
"url": "https://api.42min.us/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
ChatGPT connects only to servers on the internet:
- Open ChatGPT on the web → Settings → Connectors (Apps)
- Press Create or Add (some plans need Developer mode under Advanced first)
- Paste the address below, give it a name and save
- If it asks you to sign in, sign in with the maker
https://api.42min.us/mcpMenu names can differ slightly by plan and over time.
Your choice stays on this device in a cookie; no account needed.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
What it can do
We have not read this server’s tool list yet; we check endpoints in rotation.
Basic checksi
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified against the domain 42min.us (the registry checks domain ownership)
- … Not checked yet
Still maintained
We have not read this repo from GitHub yet
- … Not checked yet
Has a licence
We have not read this repo from GitHub yet
- … Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
- … Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
- … Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint
Compared with others in Docs, sheets & office worki
- More stars than 0% of the other 3572 servers in this category
- Published to the registry more recently than 35% of the other 3572 servers in this category
- Basic checks equal to or better than 100% of the other 3572 servers in this category
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
Common questions
Is 42min safe?
It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
What keys or codes does it need?
The registry does not list a required key, though some servers ask you to sign in on first use.
Does it run on my computer or in the cloud?
It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.
Is it still maintained?
The GitHub repo last changed –, and the latest version (0.1.0) reached the registry 2 months ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.
What can I use instead?
In the same category: Agent-Native Calendar, Excel MCP Server, MCP Server for Excel
Alternatives
Servers in the same category from other makers, sorted by stars.
Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
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Runs on your computer
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Excel automation for AI - Sheets, Power Query, DAX, VBA, Tables, Ranges and more. Windows only.
Runs on your computer
README from the maker
Open the README
Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
42min developers
Public packaging and contracts for 42min, a meeting scheduling platform. This repository holds what you need to build on 42min or connect an AI agent to it. The product itself is closed source.
| REST API | https://api.42min.us/v1 |
| MCP server | https://api.42min.us/mcp |
| Documentation | 42min.us/help/api |
| Status | OAuth 2.1, Dynamic Client Registration, personal access tokens |
What is here
plugins/42min
The 42min plugin for Cursor. Connects the editor's agent to your 42min account over OAuth and exposes 43 scheduling tools. See its README.
Any MCP client can connect without this plugin, by pointing at https://api.42min.us/mcp. The server publishes OAuth protected-resource metadata, so a compliant client discovers everything else on its own.
openapi/42min.v1.yaml
The OpenAPI 3.1 description of the public REST API, for generating clients, importing into Postman or Bruno, and feeding to a coding agent.
It is hand-written, and checked against the running API by a contract test suite that exercises every documented endpoint and validates the live response, headers and error bodies against these schemas. That is how the first draft's seven mistakes were found, including two that would have broken every generated client on every booking write. A route-coverage check fails the build if an endpoint exists but is undocumented, or the reverse.
Those checks run in our private repository, because they boot the API against a real database and cannot run here. What CI in *this* repository enforces is that the file is a valid OpenAPI 3.1 document, so a malformed spec never reaches you.
If you find a place where this file and the API disagree, the file is probably wrong: please open an issue.
server.json
The official MCP Registry entry. Declares this as a remote server on streamable HTTP at https://api.42min.us/mcp, so registry-backed directories can list it without anyone hand-filling a form.
mcp/tools.json
The MCP contract, as a machine-readable snapshot: every tool with its JSON Schema for arguments, the scopes it needs, whether it writes, and the annotations a client uses to decide when to ask you before calling. Generated from the running tool registry, not hand-maintained, and gated by a test that fails when the two disagree.
Read it if you are building a client, or feed it to a coding agent. The table in the plugin README is the human summary of the same thing.
examples/webhook-receiver
A working receiver in about 120 lines with no dependencies, and ten tests for verify.js alone. Signature verification is where integrations break: the usual cause is verifying a re-serialized body rather than the raw bytes, which no amount of reading the docs makes obvious. Copy verify.js and move on.
Built on this API
- [n8n community node](https://github.com/42min-us/n8n-nodes-42min) (
n8n-nodes-42min). Bookings, event types, slots and the current user, plus a trigger for every webhook event with signature verification built in. Runs inside your own n8n, so booking data goes from 42min to your server and nowhere else.
Authentication in one paragraph
Two mechanisms. OAuth 2.1 with PKCE for applications acting on behalf of a user, including Dynamic Client Registration, so a client can register itself without a support ticket. Personal access tokens for scripts acting as one person. Both carry scopes; the API refuses anything a token's scopes do not cover. A token acts as its user: it sees and changes exactly what that member can in 42min, so an app connected by a regular user reaches that user's bookings, and one connected by an admin the whole organization. Discovery documents live at /.well-known/oauth-authorization-server and /.well-known/oauth-protected-resource.
Full detail: Authentication.
Things worth knowing before you build
- Mutating booking calls accept `Idempotency-Key`. Retry with the same key. A new key creates a second booking. A key belongs to the user behind the token and to one endpoint.
- `PATCH /v1/bookings/{uid}` uses ETags. Read the ETag, send it back as
If-Match, and a concurrent edit fails loudly instead of silently overwriting. - There is no test environment yet. Write operations act on production: they send real email and create real calendar events. Test on event types you own, and clean up after yourself. (Our help pages use "sandbox" for something else, the per-credential isolation of webhook subscriptions.)
- Ignore unknown response fields. We add fields without notice; see CHANGELOG.md for the full versioning policy and the six-month deprecation guarantee.
Support
Open an issue for API bugs, specification errors, or plugin problems. Security reports go to plus@42min.us, not to the issue tracker: see SECURITY.md.
License
MIT. See LICENSE.