Groupon MCP

Name: Groupon MCP
Author: chrischall

by chrischallversion 1.2.0i★ –iRuns on your computer

Registry nameio.github.chrischall/groupon-mcp

Install

Overview

Description from the maker (original English)

Groupon deals for Claude — search and browse local, goods, and travel deals

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
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 on your computer
Transport: stdio
Category: Online shops & payments
You need to fill in: GROUPON_SESSION_COOKIE

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: GROUPON_SESSION_COOKIE, GROUPON_DISABLE_FETCHPROXY, GROUPON_GRAPHQL_URL, GROUPON_CACHE_TTL, FETCHPROXY_WS_PORT, FETCHPROXY_WS_HOST, FETCHPROXY_IDENTITY_DIR

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "groupon": {
      "command": "npx",
      "args": [
        "-y",
        "groupon-mcp"
      ],
      "env": {
        "GROUPON_SESSION_COOKIE": "your-value",
        "GROUPON_DISABLE_FETCHPROXY": "your-value",
        "GROUPON_GRAPHQL_URL": "your-value",
        "GROUPON_CACHE_TTL": "your-value",
        "FETCHPROXY_WS_PORT": "your-value",
        "FETCHPROXY_WS_HOST": "your-value",
        "FETCHPROXY_IDENTITY_DIR": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add groupon --env GROUPON_SESSION_COOKIE=your-value --env GROUPON_DISABLE_FETCHPROXY=your-value --env GROUPON_GRAPHQL_URL=your-value --env GROUPON_CACHE_TTL=your-value --env FETCHPROXY_WS_PORT=your-value --env FETCHPROXY_WS_HOST=your-value --env FETCHPROXY_IDENTITY_DIR=your-value -- npx -y groupon-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "groupon": {
      "command": "npx",
      "args": [
        "-y",
        "groupon-mcp"
      ],
      "env": {
        "GROUPON_SESSION_COOKIE": "your-value",
        "GROUPON_DISABLE_FETCHPROXY": "your-value",
        "GROUPON_GRAPHQL_URL": "your-value",
        "GROUPON_CACHE_TTL": "your-value",
        "FETCHPROXY_WS_PORT": "your-value",
        "FETCHPROXY_WS_HOST": "your-value",
        "FETCHPROXY_IDENTITY_DIR": "your-value"
      }
    }
  }
}

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": {
    "groupon": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "groupon-mcp"
      ],
      "env": {
        "GROUPON_SESSION_COOKIE": "your-value",
        "GROUPON_DISABLE_FETCHPROXY": "your-value",
        "GROUPON_GRAPHQL_URL": "your-value",
        "GROUPON_CACHE_TTL": "your-value",
        "FETCHPROXY_WS_PORT": "your-value",
        "FETCHPROXY_WS_HOST": "your-value",
        "FETCHPROXY_IDENTITY_DIR": "your-value"
      }
    }
  }
}

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.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

GROUPON_SESSION_COOKIE secret env
Optional, and only for the cart tools. Leave unset to have the ContextMint Bridge browser extension pick up your signed-in groupon.com session. Otherwise paste the full Cookie request header from a s…
GROUPON_DISABLE_FETCHPROXY env
Set to 1/true to disable the fetchproxy browser-bridge fallback (then the cart path relies solely on GROUPON_SESSION_COOKIE).
GROUPON_GRAPHQL_URL env
Override the GraphQL endpoint (defaults to https://www.groupon.com/mobilenextapi/graphql). The cart tools send your session cookie, so they refuse any override that is not an https://*.groupon.com UR…
GROUPON_CACHE_TTL env
Response-cache TTL for reads in seconds (0 = off; default 60).
FETCHPROXY_WS_PORT env
Localhost port of the fetchproxy concentrator the ContextMint Bridge extension connects to (default 37149). Every MCP on one machine shares it, so move it for all of them or not at all.
FETCHPROXY_WS_HOST env
Bind interface for the fetchproxy concentrator, a literal IP only (default 127.0.0.1). Keep on loopback; it exists for hosted deployments that run each MCP in its own network namespace.
FETCHPROXY_IDENTITY_DIR env
Absolute path where the fetchproxy long-term identity keypair is stored (default ~/.fetchproxy/identity/).

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

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 chrischall, 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
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Online shops & paymentsi

More stars than 0% of the other 2534 servers in this category
Published to the registry more recently than 87% of the other 2534 servers in this category
Basic checks equal to or better than 100% of the other 2534 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 Groupon MCP 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?

You need to fill in: GROUPON_SESSION_COOKIE

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.2.0) reached the registry 3 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Spree Commerce: open-source B2B and marketplace ecommerce, Stripe MCP, MCP Cn Commerce

Alternatives

Servers in the same category from other makers, sorted by stars.

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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.

groupon-mcp

MCP server for Groupon — search and browse local, goods, and travel deals from Claude via natural language, and add deals to your signed-in Groupon cart once you confirm.

This project was developed and is maintained by AI. Use at your own discretion.

Tools

Tool	What it does	Needs sign-in
`groupon_search_deals`	Search or browse a city's deals	no
`groupon_get_deal`	One deal's detail, including each option's id and price	no
`groupon_list_categories`	Groupon's category taxonomy	no
`groupon_healthcheck`	One live request to Groupon, reporting what failed if anything did	no
`groupon_view_cart`	The items in your Groupon cart	yes
`groupon_purchase`	Add a deal option to your cart (after you confirm) and return the checkout URL	yes
`groupon_clear_cart`	Remove every item from your cart (after you confirm)	yes

The deal reads use Groupon's public consumer endpoint with no API key or account. The cart tools act on your signed-in Groupon account through its session cookie (see below). groupon_purchase cannot place an order: Groupon's checkout is native Apple/Google Pay, card or PayPal, so you complete payment yourself at the checkout URL.

Setup

Add the server to your .mcp.json:

"mcpServers": { "groupon": { "command": "npx", "args": ["-y", "groupon-mcp"] } } }

Cart sign-in (optional)

Reading deals needs no account. The cart tools (groupon_view_cart, groupon_purchase, groupon_clear_cart) use your signed-in groupon.com session, which the server picks up from your browser through the ContextMint Bridge extension:

Install ContextMint Bridge from its releases page. Chrome: download the Chrome zip, unzip it, and load it unpacked at chrome://extensions (Developer mode). Safari isn't available yet (it will ship inside the ContextMint app, which has no public download), so use Chrome for now.

ContextMint Bridge is the fetchproxy browser extension under its new name, from the same maintainer; fetchproxy's own README (https://github.com/chrischall/fetchproxy#extension) points to it. Its source is public at https://github.com/nullnet-app/contextmint-bridge: build it yourself, or check a release zip against the .sha256 file published beside it (shasum -a 256 -c contextmint-bridge-chrome- .zip.sha256).

Sign in at groupon.com in that browser. The first cart call lifts the session cookie; approve the request in the extension when asked.

For local dev without the extension, set GROUPON_SESSION_COOKIE (see .env.example); set GROUPON_DISABLE_FETCHPROXY=1 to turn the browser path off. The cookie authorizes changes to your cart, so treat it like a password. The cart tools only send it to an https://*.groupon.com endpoint, and refuse a GROUPON_GRAPHQL_URL override pointing anywhere else.

Environment

All optional; they mirror the .mcpb manifest's settings (the MCP_CONFIRM_* family is under Confirmations).

variable	default
`GROUPON_SESSION_COOKIE`	unset	Full `Cookie` header from a signed-in www.groupon.com request, for the cart tools only. Leave unset to have the bridge pick up your session. Treat it like a password.
`GROUPON_DISABLE_FETCHPROXY`	unset	`1` turns the browser-bridge path off; the cart tools then rely on `GROUPON_SESSION_COOKIE`.
`GROUPON_GRAPHQL_URL`	`https://www.groupon.com/mobilenextapi/graphql`	GraphQL endpoint override. The cart tools refuse any override that is not an `https://*.groupon.com` URL.
`GROUPON_CACHE_TTL`	`60`	Response-cache TTL for reads, in seconds (`0` = off). Raise it if you hit rate limits.
`FETCHPROXY_WS_PORT`	`37149`	Concentrator port the ContextMint Bridge connects to. Every MCP on one machine shares it, so move it for all of them or none.
`FETCHPROXY_WS_HOST`	`127.0.0.1`	Bridge bind interface, a literal IP only. Keep on loopback; it exists for hosted deployments in their own network namespace.
`FETCHPROXY_IDENTITY_DIR`	`~/.fetchproxy/identity/`	Absolute path for the bridge's long-term identity keypair.

Confirmations

The cart writes (groupon_purchase, groupon_clear_cart) ask you to confirm before they change anything. A client that can show a confirmation prompt (Claude Code) shows one, unless the server sets MCP_CONFIRM_ELICITATION=off. Elsewhere, the first call changes nothing and returns a preview plus a confirmToken, and only a repeat call with that token proceeds. The token is tied to exactly what was previewed: if the deal's price, the chosen option or quantity, or the cart's contents change between the two calls, the write is refused and a fresh preview is returned. groupon_purchase's preview also shows how many of that option are already in your cart, since Groupon may set the line to the new quantity rather than add to it. It still only fills the cart; you complete payment yourself at the checkout URL. groupon_clear_cart removes only the cart's line items, and accepts the previewed optionIds back as expectedOptionIds so it refuses if the cart has changed; if a removal fails partway it says which items were and were not removed.

variable	default
`MCP_CONFIRM_MODE`	`ask-user`	What a write does on a client that cannot show a confirmation prompt (claude.ai, Claude Desktop). `ask-user`: two steps — the first call does nothing and returns a preview plus a token, and the model must get your approval in chat before calling again with it. `auto`: the same two steps, but the model may use the token after reviewing the preview itself. `refuse`: writes are refused on such clients. A client that can show prompts (Claude Code) always gets the real prompt, unless `MCP_CONFIRM_ELICITATION=off`. An unrecognised value is treated as `refuse`.
`MCP_CONFIRM_ELICITATION`	`on`	`off` never shows a confirmation prompt, so every client gets the `MCP_CONFIRM_MODE` behaviour. Set it for a client that says it can show prompts but never does (the write hangs — opencode 2.0.x). Any other value is treated as `on`, with a warning on stderr.
`MCP_CONFIRM_TTL_SECONDS`	`600`	How long a token stays valid.
`MCP_CONFIRM_SECRET`	random per process	Signing key; set it only if tokens must survive a server restart.

Development

npm install

npm run build # tsc + esbuild bundle → dist/ npm test # tsc typecheck + vitest

See CLAUDE.md for architecture, conventions, and gotchas.

License

MIT

Groupon MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

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 Online shops & paymentsi

Common questions

Alternatives

Spree Commerce: open-source B2B and marketplace ecommerce

Stripe MCP

MCP Cn Commerce

README from the maker

groupon-mcp

Tools

Setup

Cart sign-in (optional)

Environment

Confirmations

Development

License