Neutra

Name: Neutra
Author: emokeo

by emokeoversion 0.2.0i★ –iRuns in the cloud

Registry nameio.github.emokeo/neutra

Install

Overview

Description from the maker (original English)

Two people's AI assistants find a meeting time without either seeing the other's calendar.

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 checksi3 of 3 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

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: 3 of 3 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?

ClaudeClaude CodeCursorVS CodeChatGPT

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://neutra.day/mcp

Run this in your terminal

claude mcp add --transport http neutra https://neutra.day/mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "neutra": {
      "url": "https://neutra.day/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.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "neutra": {
      "type": "http",
      "url": "https://neutra.day/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://neutra.day/mcp

Menu 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

The server asks you to sign in before it lists its tools.

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 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account emokeo, which owns the repo
… 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
✓ Pass
Endpoint responds
Responded in 455 ms (HTTP 401)
✓ Pass
Sign-in with OAuth
Declares OAuth sign-in, so your AI app can take you to log in
… 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 2193 servers in this category
Published to the registry more recently than 93% of the other 2193 servers in this category
Basic checks equal to or better than 100% of the other 2193 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 Neutra safe?

It passed 3 of 3 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 (0.2.0) reached the registry yesterday.

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:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Agent-Native Calendar

by BuilderIO

Agent-Native Google Calendar - manage events, sync, and public booking

Runs in the cloud★ 7,620MITUpdated 2 months ago

Install

Excel MCP Server

by haris-musa

Lets AI create and edit Excel files itself, including formulas, charts and PivotTables, without Excel installed.

Runs on your computer★ 4,276MITUpdated 6 days ago

Install

MCP Server for Excel

by sbroenne

Excel automation for AI - Sheets, Power Query, DAX, VBA, Tables, Ranges and more. Windows only.

Runs on your computer★ 847MITUpdated 4 days ago

Install

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.

Neutra

A neutral place where people's AI assistants agree on things for them, without anyone seeing anyone else's data.

Today it does one thing: two people's assistants find a time to meet. Each assistant tells Neutra when its person is free. Neutra finds a common time and sends one calendar invite to both. Neither side ever sees the other's times.

sequenceDiagram

participant A as Anna's assistant participant N as Neutra participant B as Ben's assistant A->>N: Anna's free times N-->>A: a message for Anna to forward to Ben Note over A,B: Anna forwards it in any chat B->>N: Ben's free times + the code N-->>A: calendar invite N-->>B: calendar invite

It works across assistants: Anna can use Claude and Ben another assistant, as long as both support MCP connectors. Ben can also answer without an assistant: the message includes a link to a simple page where he signs in with Google and adds the times he's free.

Privacy, by design

No AI on Neutra's side. Neutra is plain code that compares time ranges. Your times never go into an AI model of ours.
Nobody sees anyone's times. Only the matched meeting time comes back. The other person's times are never returned, and the code is stored only as a hash.
Times are deleted as soon as a decision is settled, at the latest after 14 days. The person answering never has their times stored at all.
Retries can't map a calendar. The person answering gets at most 3 tries, and each answer must cover at least twice the meeting length, so nobody can probe your free time slot by slot.
Data stays in the EU, in Cloudflare's EU jurisdiction.
Checked by tests: test/decisions.test.ts verifies that no times or codes appear in any response.

Details: privacy page.

Try it

In Claude: Customize → Connectors → Add custom connector, URL https://neutra.day/mcp, then Add.
Sign in with Google. Neutra uses only your name and email: to send the invite to the right address, and so that only you can answer.
Ask: *"Use Neutra to find an hour with Ben next week. I'm free Tuesday and Thursday, 18:00–21:00."* Forward the message it gives you.

For agent builders

A remote MCP server with Google sign-in. Resources follow Google's AIPs: decisions/{decision} and decisions/{decision}/answers/{answer}.

Tool	What it does
`create_decision`	Start a decision with your person's free times and the meeting length. Returns a code and a message to forward.
`create_answer`	Answer with the code from the message (`neutra: .` ) and your person's free times. A match sends the invite.
`get_decision`	Status (`WAITING`, `NO_MATCH`, `INVITE_SENT`, `ACCEPTED`, `DECLINED`, `EXPIRED`) and the meeting time.
`delete_decision`	Cancel a decision you started, including its invite.
`get_answer`	Read your own answer.
`create_feature_request`	Tell Neutra's makers about something your person wanted that Neutra can't do yet.
`get_feature_request`	Read a feature request you sent.

Errors use google.rpc codes: NOT_FOUND, PERMISSION_DENIED, FAILED_PRECONDITION, INVALID_ARGUMENT, RESOURCE_EXHAUSTED (a daily or hourly limit was reached).

Running Neutra

Runs on Cloudflare Workers with D1, based on Cloudflare's remote-mcp-google-oauth template. Every push to main is type-checked, tested and deployed by GitHub Actions (.github/workflows/deploy.yml); migrations in migrations/ are applied before each deploy. Changes go through pull requests.

Setup (done once)

Cloudflare

Account ID and the MCP_RESOURCE address are in wrangler.jsonc. The domain neutra.day is attached to the Worker as a Custom Domain in the Cloudflare dashboard.
API token: "Edit Cloudflare Workers" template plus D1: Edit.
The D1 database (EU jurisdiction) and the OAUTH_KV namespace were created once with wrangler d1 create neutra --jurisdiction eu and wrangler kv namespace create OAUTH_KV; their IDs are in wrangler.jsonc.

Google Cloud (project neutra)

Google Auth Platform: audience External, publishing status In production (testing mode makes refresh tokens expire after 7 days). Branding: home page and privacy links above, authorized domain neutra.day.
Web client with redirect URI https://neutra.day/callback, used by both the connector sign-in and the browser answer page (add https://developers.google.com/oauthplayground only while making a new inviter key, and http://localhost:8788/callback for local dev).
Google Calendar API and Gmail API enabled.
Sign-in asks only for email and profile. While ACCESS_MODE is allowlist, only ALLOWED_EMAILS can sign in.

Inviter (neutra.invites@gmail.com)

Refresh token with scopes calendar.events and gmail.send, obtained via the OAuth 2.0 Playground using the web client's own credentials (steps in docs/RUNBOOK.md).

GitHub secrets (Settings → Secrets and variables → Actions)

Secret	What
`CLOUDFLARE_API_TOKEN`	Cloudflare API token
`GOOGLE_CLIENT_ID`, `GOOGLE_CLIENT_SECRET`	Web client
`COOKIE_ENCRYPTION_KEY`	Any long random string
`ALLOWED_EMAILS`	Comma-separated emails of the test users
`INVITER_REFRESH_TOKEN`	Inviter's refresh token

Local development

npm install, copy .dev.vars.example to .dev.vars and fill it in, then npm run dev. Test with npx @modelcontextprotocol/inspector@latest against http://localhost:8788/mcp.

License

MIT, see LICENSE. Includes code from Cloudflare's MIT-licensed templates.

Neutra

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Docs, sheets & office worki

Common questions

Alternatives

Agent-Native Calendar

Excel MCP Server

MCP Server for Excel

README from the maker

Neutra

Privacy, by design

Try it

For agent builders

Running Neutra

Setup (done once)

Local development

License