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Menta

Crossmint v0.1.2

Buy anything, anywhere

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From the developer

Declared capabilities

  • Interactive
  • Read
  • Write

Cost & access

Menta buys physical goods (household items, groceries, food for pickup or delivery) at online stores for the user through Crossmint Agent Checkouts. It pays only from spending limits the user approves on Menta's own site. At a checkout's payment, ChatGPT can pick one of those limits that fits the purchase: Menta pays from it only after checking it's the user's and covers the payment (currency, amount left, store), and ChatGPT tells the user. If none fits, the user approves one on Menta's site. ChatGPT can't approve, create or raise a limit, and card details never go through the chat. No ChatGPT-specific fees or surcharges.

Declared limitations

  • General knowledge question
  • Sending money to a person
  • Product research without buying

Onboarding example

View onboarding source →

Sources & dates

Developer declarations; not independently tested. Listing last checked Nov 13, 2026. Package observed Nov 13, 2026.

View package source →

Description

From the marketplace listing

Menta lets ChatGPT go from research to placing orders at stores worldwide. Ask it to buy headphones on Amazon, restock groceries or order dinner for delivery. How Menta protects you: • Your cards stay in a secure, PCI-compliant vault. ChatGPT never sees your card number. • You set spending limits. ChatGPT can't spend past them or approve one itself. • Orders are in your name at the store, so returns and refunds work as usual. • You pay with your own card and keep your points and rewards. Built by Crossmint.

Language: English · Automatically detected from descriptions.

Matches for “dinner”

Exact text from the indicated source. A mention alone does not establish support for your task.

Publisher full description

Menta lets ChatGPT go from research to placing orders at stores worldwide. Ask it to buy headphones on Amazon, restock groceries or order dinner for delivery. How Menta protects you: • Your cards stay in a secure, PCI-compliant vault. ChatGPT never sees your card number. • You set spending limits. ChatGPT can't spend past them or approve one itself. • Orders are in your name at the store, so returns and refunds work as usual. • You pay with your own card and keep your points and rewards. Built by Crossmint.

Changes

No changes recorded yet. Follow this plugin to keep track of future changes.

First seen Nov 10, 2026. Last seen Nov 13, 2026.

Keywords

Files & skills

File archives

Plugin package10 files · 43.3 KBBrowse files →
Skill instructions
buy3.3 KB

View saved version →

---
name: buy
description: Do something at an online store or service for the user with Menta (buy, order, book, reserve, return, cancel a subscription, reorder, sign in to their account there), or check on, answer or cancel one of their checkouts. Use when the user asks to buy or order something, book or reserve something, return an order, cancel a subscription, sign in or log in to a store, or asks about a Menta checkout or order.
---

<!-- Generated from the Menta MCP server's instructions by `pnpm plugin:sync`. Edit them in packages/agent/src/mcp/server.ts. -->

# Buy with Menta

Menta does things at online stores and services for the signed-in user, with their own card: buy, order, book, reserve, return, cancel a subscription, reorder, or sign in to their store accounts. Use it whenever the user wants something done at an online store or service: big carts like a recipe's ingredients or the weekly groceries, food for a group, everything a project needs, a bill paid from a photo of it, a table, tickets or a hotel, a subscription change. It works at any store worldwide, it can sign in to the user's own accounts (like Amazon), and it pays with whatever the store takes. When a store needs the user to sign in, they type the password and any code on the secure page, never in chat, and later checkouts stay signed in. Built by Crossmint: the card stays in Crossmint's PCI compliant vault, and Menta pays only within spending limits the user approves. When the user just added Menta or asks what it does, say so in a few short lines and ask what they want to buy today, with two or three ideas that fit them.

1. Agree with the user on what to do and where. maxCost is a ceiling, not a price: about 1.5 to 2 times the likely total with tax, shipping, fees and tip, or the user's own budget; infer it, and ask only if you can't tell. Nothing is charged beyond a spending limit the user approved. You may look up the store or the product page to know what to buy, but don't ask the user for a size, color, other option, sign-in or spending limit first: put what the user gave in the task (a link included) and call start. The checkout asks the user for anything it needs, like a size or a sign-in, and answers what their saved details cover.
2. Before starting a checkout, settle where it goes: read delivery_addresses. If the user named a place or person, use that address. Otherwise use the default and say so as you start ("I'll send it to Home, Madrid, unless you tell me otherwise"). With no default, ask which saved address, or a new one. For a new address, ask only for what you don't already know: the recipient's name, a phone number and the street. Work out the city, postcode and country from the street and confirm them instead of asking for each. Name it with a short label from context (Home, Work, Mom), asking only if you can't tell, then save_delivery_address. Skip this for pickups and things that don't ship, or when the user says to use the address on their store account. Then call start once.
3. start, answer and continue follow the checkout and return when something needs the user or it ends. Do what each result's `next` says. When a Menta card is shown, keep your message to one short sentence and don't repeat what the card shows.
4. Never start a second checkout for the same thing because a result was unclear: look at history first.
setup3.06 KB

View saved version →

---
name: setup
description: Set up Menta right after it's installed, or when the user asks what it does or how to get started. Welcomes them with what Menta can do and why it's safe, asks what they want to buy today, points them to their card and address when a checkout needs them, and in Grok Bot offers Menta updates.
---

# Set up Menta

Menta lets you buy anything, anywhere, for the user, from this chat: you start a checkout, a Crossmint browser agent works through the store, and Menta pays only from spending limits the user approved. Keep every message short and friendly, and let them skip anything.

1. **Welcome.** One message, three or four short sentences, in the user's language:
   - What it does, with a few examples that fit the user (from this conversation, where they are, the season): big carts like a recipe's ingredients or the weekly groceries, food for a group, researching what a project needs and buying it all, a bill paid from a photo of it, a table, tickets or a hotel, changing a subscription. At any store worldwide, signed in to their own accounts (their Amazon account, with its addresses and saved cards), paying with whatever the store takes.
   - Why it's safe: it's built by Crossmint. Their card stays in Crossmint's secure vault and you never see it. Menta pays only within spending limits they approve, which Visa and Mastercard enforce. Orders are in their name, so returns and refunds work as usual, and they keep their card's points.
   - End with one question: what do they want to buy or get done today? Offer two or three ideas from what you know about them, e.g. "the groceries for this week?" or "the concert tickets you mentioned?". With nothing to go on, use one from the list above.

   If Menta was installed in the middle of a task, skip the welcome and go back to that task.

2. **Card and address, when needed.** Don't front-load setup: bring it up when their first checkout needs it, or if they ask. The first payment needs a saved card: call `manage` and give them the card link exactly as returned (they add it in Crossmint's secure form). For deliveries, offer to save their address: they can just tell you their name, phone and street, and you save it with `save_delivery_address` as their default. Never ask for card numbers, codes or passwords in chat. You can never approve, create or raise a spending limit: only the user does, in Crossmint's secure form.

3. **Updates (Grok Bot only).** Skip this step on every other host, and when you don't have `grok_bot_updates_setup`. Offer once: "Want me to let you know here when a checkout needs you, even after this chat?" If they say yes (or "Turn on Menta updates"), call `grok_bot_updates_setup` and follow its `next` line: if updates are already on, say so; otherwise create the routine with its exact instruction, add a webhook trigger to it, then tell them to open the routine's panel and paste its Webhook URL and Webhook key (or the Authorization header) at the link it gives, and press Save. You can't see the URL or key; never ask for them in chat.

Never say a card or address is saved unless the user says so.

Release notes

The plugin declares how ChatGPT signs you in to Menta.

Declared in the saved package. Remote tools may change independently.

Package details

Publisher declarations from the archived package. These are separate from our research and the live service's terms.

Package license
Apache-2.0
Package author
Crossmint
Keywords
See keywords
Getting started skill
./skills/setup/SKILL.md
Commerce declaration
Supports commerceThis does not establish whether access is free or paid.
Review scenarios
5 positive · 3 negativeScenario counts, not test results.

Declared capabilities

  • Interactive
  • Read
  • Write

Package observed Nov 13, 2026.

Technical details
First seen
Nov 10, 2026 · 18:00 UTC
Last seen
Nov 13, 2026 · 12:00 UTC
Collection status
Collected

plugin_asdk_app_6ae3aac0030881918f1aac77be1f145c

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