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PopNx MCPMCP servers for people who use AI · explained in plain words

Polar MCP by usefulapi

by m190version 1.38.0i★ 1 (Stars for the whole repo)iRuns in the cloud
Registry nameio.usefulapi/polar-sh

How to install

What it does

Products, customers, orders, subscriptions, benefits, revenue metrics and refunds.

  • Connects Runs in the cloud
  • Account or key No key needed
  • Category Online shops & payments

Install

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

Passed 4/4 checks · What you ask goes through the maker’s server (polar-sh.usefulapi.io)

First: which AI do you use?

Pick your app and the steps appear below.

Works with Claude · about 2 min

No key, nothing to install · Set it up once on claude.ai or the desktop app, then use it in chat · free accounts can add 1 · on Team/Enterprise an Owner adds it

  1. Open Claude’s Connectors page

    CustomizeConnectors

    CustomizeConnectors1+ Add2https://…3Add4
  2. Click “+ Add” → “Add custom connector” and fill in these 2 fields

    Copy each value into the field with the same name in Claude, then click Continue

    Name · NamePolar MCP by usefulapi
    Remote MCP server URL · Addresshttps://polar-sh.usefulapi.io/mcp

    Leave Authentication as Claude detected it, then click Add

  3. Turn it on in a chat

    +ConnectorsPolar MCP by usefulapi

  4. Try it

    Use Polar MCP by usefulapi and tell me what you can do for me, then show me one thing

    ✓ If Claude says it is using Polar MCP by usefulapi or shows a Polar MCP by usefulapi tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with ChatGPT on business plans only

ChatGPT Business, Enterprise or Edu on the web, added by a workspace admin or owner · On Free, Plus or Pro: your ChatGPT plan cannot connect MCP yet

  1. Open ChatGPT’s add-MCP page on the web

    Plugins+Add custom MCP server

    ChatGPTPlugins1+2https://…3Create4
  2. Fill in the name and address

    Enter a name, paste the address under Connection, tick the risk warning and click Create as a plugin

    Name · NamePolar MCP by usefulapi
    Connection · Addresshttps://polar-sh.usefulapi.io/mcp
  3. Pick Polar MCP by usefulapi in a chat

    Start a new chat and pick Polar MCP by usefulapi from your plugins before typing

  4. Try it

    Use Polar MCP by usefulapi and tell me what you can do for me, then show me one thing

    ✓ If ChatGPT says it is using Polar MCP by usefulapi or shows a Polar MCP by usefulapi tool in the answer, you are connected

Menu names checked against OpenAI’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with Claude Code · about 2 min

No key, nothing to install

  1. Open Terminal

    Mac: press Command+Space and type Terminal · Windows: open PowerShell

  2. Paste this command and press Enter

    claude mcp add --transport http --scope user polar-sh https://polar-sh.usefulapi.io/mcp
  3. Type /mcp in Claude Code

    You should see Polar MCP by usefulapi listed as connected

  4. Try it

    Use Polar MCP by usefulapi and tell me what you can do for me, then show me one thing

    ✓ If Claude Code says it is using Polar MCP by usefulapi or shows a Polar MCP by usefulapi tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with Cursor · about 2 min

No key, nothing to install

  1. Click this button to open Cursor

    Open in Cursor

    Cursor asks you to confirm; click Install

  2. Open the AI chat in Cursor in Agent mode

  3. Try it

    Use Polar MCP by usefulapi and tell me what you can do for me, then show me one thing

    ✓ If Cursor says it is using Polar MCP by usefulapi or shows a Polar MCP by usefulapi tool in the answer, you are connected

Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with VS Code · about 2 min

No key, nothing to install

  1. Click this button to open VS Code

    Open in VS Code

    VS Code asks you to confirm; click Install

  2. Open the AI chat in VS Code in Agent mode

  3. Try it

    Use Polar MCP by usefulapi and tell me what you can do for me, then show me one thing

    ✓ If VS Code says it is using Polar MCP by usefulapi or shows a Polar MCP by usefulapi tool in the answer, you are connected

Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.

See every app that uses MCP →

Address for apps that connect over the web

Addresshttps://polar-sh.usefulapi.io/mcp

JSON settings are under “For developers” below

Stuck? Ask people who use Polar MCP by usefulapi💬 Discussion →
For developers: Terminal commands and JSON settings

Over the web

Claude Code

claude mcp add --transport http --scope user polar-sh https://polar-sh.usefulapi.io/mcp

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "polar-sh": {
      "url": "https://polar-sh.usefulapi.io/mcp"
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "polar-sh": {
      "type": "http",
      "url": "https://polar-sh.usefulapi.io/mcp"
    }
  }
}

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

At a glance

GitHub starsi
1 (Stars for the whole repo)
This repo holds several MCP listings; its stars count once in rankings
Downloads per weeki
Not on npm/PyPI
Verified domain
✓ usefulapi.io
Licencei
No licence stated
Connection
Runs in the cloud
Transport
streamable-http
Latest versioni
1.38.0
Published to registryi
Nov 12, 2026
Code last changedi
Nov 11, 2026
Maker
m190
Registry status
Active

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Connect over the internet in

ClaudeChatGPTGooseLM StudioMsty StudioCherry StudioCursorVS Code + GitHub CopilotVisual StudioWindsurf (Devin Desktop)ZedKiroClineContinueJetBrains AI AssistantClaude CodeCodex CLIGemini CLIOpenCodenodecodeWarpLibreChatOpen WebUIRaycast

All apps, with pros and cons →

Related guides

What it can do

Tool names and descriptions exactly as the server reported them on Nov 9, 2026. The maker wrote them, not us; we show them as plain text.

  • polar_list_organizations

    List the organisations the token can act for. Start here — most other tools take an organization_id. Polar: GET /v1/organizations/.

  • polar_list_products

    List products, optionally filtered by archived state, recurrence or a text query. Polar: GET /v1/products/.

  • polar_get_product

    Fetch a single product with its prices and attached benefits. Polar: GET /v1/products/{id}.

  • polar_list_customers

    List customers, optionally by email or a text query. Polar: GET /v1/customers/.

  • polar_get_customer

    Fetch a single customer by Polar id. Polar: GET /v1/customers/{id}.

  • polar_get_customer_state

    Fetch everything about one customer in a single call — active subscriptions, granted benefits and entitlements. The best answer to 'what does this customer currently have?'. Polar: GET /v1/customers/{id}/state.

  • polar_get_customer_state_by_external_id

    Same as polar_get_customer_state, but looked up by YOUR external id rather than Polar's — the usual path when you hold your own user id. Polar: GET /v1/customers/external/{external_id}/state.

  • polar_list_orders

    List orders, filtered by customer, product, subscription, status or a date window. Polar: GET /v1/orders/.

  • polar_get_order

    Fetch a single order with its line items, discount and tax. Polar: GET /v1/orders/{id}.

  • polar_list_subscriptions

    List subscriptions, filtered by customer, product, status, active state or cancellation window. Polar: GET /v1/subscriptions/.

  • polar_get_subscription

    Fetch a single subscription with its product, price and period. Polar: GET /v1/subscriptions/{id}.

  • polar_get_metrics

    Fetch revenue and subscription metrics over a date range, bucketed by interval — orders, revenue, MRR, active subscriptions. Polar: GET /v1/metrics/.

  • polar_list_benefits

    List benefits — the things a product grants, such as licence keys, file downloads or Discord roles. Polar: GET /v1/benefits/.

  • polar_list_benefit_grants

    List who has been granted one benefit, and whether the grant is still active. Polar: GET /v1/benefits/{id}/grants.

  • polar_list_discounts

    List discount codes and their redemption limits. Polar: GET /v1/discounts/.

  • polar_list_refunds

    List refunds, filtered by order, subscription, customer or success. Polar: GET /v1/refunds/.

  • polar_list_license_keys

    List issued licence keys and their status. Polar: GET /v1/license-keys/.

  • polar_list_meters

    List the usage meters that aggregate events into billable quantities. Polar: GET /v1/meters/.

  • polar_get_meter_quantities

    Fetch the aggregated quantities a meter has recorded over a window — what usage-based billing will charge for. Polar: GET /v1/meters/{id}/quantities.

  • polar_list_events

    List the raw usage events ingested for metering, filtered by customer, meter, name or time. Polar: GET /v1/events/.

  • polar_list_webhook_deliveries

    List webhook delivery attempts with their HTTP results — the tool for 'why did my webhook not arrive?'. Polar: GET /v1/webhooks/deliveries.

  • polar_list_webhook_endpoints

    List the configured webhook endpoints and their subscribed events. Polar: GET /v1/webhooks/endpoints.

  • polar_redeliver_webhook_event

    Queue one webhook event for redelivery after your endpoint recovered. Polar: POST /v1/webhooks/events/{id}/redeliver.

  • polar_create_refund

    Refund an order, in full or in part. This moves real money back to the customer. Polar: POST /v1/refunds/.

  • polar_cancel_subscription

    Cancel a subscription at the end of its current period. The customer keeps access until then. Polar: PATCH /v1/subscriptions/{id}.

  • polar_create_checkout_link

    Create a reusable checkout URL for one or more products — the link you put in a page or an email. Polar: POST /v1/checkout-links/.

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 12, 2026

  • ✓ Pass

    Maker matches the repo

    The registry name was verified against the domain usefulapi.io (the registry checks domain ownership)

  • ✓ Pass

    Still maintained

    Code last changed yesterday

  • … Not checked yet

    Has a licence

    We have not read this repo from GitHub yet

  • ✓ Pass

    Endpoint responds

    Responded in 41 ms (HTTP 200)

  • – Not applicable

    Sign-in with OAuth

    No sign-in needed

  • ✓ Pass

    No hidden instructions in tool descriptions

    Read 26 tool descriptions and found no hidden instructions to the AI

Discussion

Ask, share a tip or report that it does not work. Sorted by what people marked helpful.

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Posts here are written by users, not the PopNx team.

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User reviews

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Compared with others in Online shops & paymentsi

  • More stars than 0% of the other 2735 servers in this category
  • Published to the registry more recently than 92% of the other 2735 servers in this category
  • Basic checks equal to or better than 100% of the other 2735 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 Polar MCP by usefulapi safe?

It passed 4 of 4 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 yesterday, and the latest version (1.38.0) reached the registry today.

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 Business and above.

What can I use instead?

In the same category: Spree Commerce developer docs for AI agents, Stripe MCP, Sessy — Amazon SES observability

Others in the same category

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

Spree Commerce developer docs for AI agents

Spree Commerce docs for AI coding agents: build headless B2B and marketplace ecommerce on its APIs.

by spreeWidely used★ 15.8K Stars for the whole repoUpdated 13 days ago

Runs in the cloud

Stripe MCP

Stripe’s official server lets AI view and manage customers, products, payments and invoices. Connect to Stripe’s cloud and sign in with OAuth.

by stripeWidely used★ 2.1KUpdated 13 months ago

Runs in the cloud✓ service owner · stripe.com

Sessy — Amazon SES observability

Read-only Amazon SES observability: search events, inspect bounces, pull delivery stats.

by marckohlbruggeGrowing★ 945Updated 3 months ago

Runs in the cloud

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.

Polar MCP by usefulapi

Products, customers, orders, subscriptions, benefits, revenue metrics and refunds. Hosted, no local install.

Live endpoint: https://polar-sh.usefulapi.io/mcp · Homepage: https://usefulapi.io

Connect

  • Claude (claude.ai, Desktop): open Customize → Connectors, click + Add → Add custom connector, and paste https://polar-sh.usefulapi.io/mcp.
  • Claude Code: claude mcp add --transport http polar-sh https://polar-sh.usefulapi.io/mcp, then run /mcp to log in.
  • VS Code: Add to VS Code.
  • Cursor and other clients: add the URL as a remote MCP server:
{

"mcpServers": { "polar-sh": { "url": "https://polar-sh.usefulapi.io/mcp" } } }

Add only the URL. Do not add an Authorization header or an API key to the client config: the server signs you in with OAuth, and the login page asks for your Polar credentials.

Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/polar-sh/

On first connect you'll paste your Polar credentials. They are validated, stored per-user, and scoped to you — no keys in config files.

Tools

ToolTypeWhat it does
polar_list_organizationsreadList organisations
polar_list_productsreadList products
polar_get_productreadGet one product
polar_list_customersreadList customers
polar_get_customerreadGet one customer
polar_get_customer_statereadGet a customer's full state
polar_get_customer_state_by_external_idreadGet a customer's state by your own id
polar_list_ordersreadList orders
polar_get_orderreadGet one order
polar_list_subscriptionsreadList subscriptions
polar_get_subscriptionreadGet one subscription
polar_get_metricsreadGet revenue metrics
polar_list_benefitsreadList benefits
polar_list_benefit_grantsreadList grants of a benefit
polar_list_discountsreadList discounts
polar_list_refundsreadList refunds
polar_list_license_keysreadList licence keys
polar_list_metersreadList usage meters
polar_get_meter_quantitiesreadGet a meter's quantities
polar_list_eventsreadList usage events
polar_list_webhook_deliveriesreadList webhook deliveries
polar_list_webhook_endpointsreadList webhook endpoints
polar_redeliver_webhook_eventwriteRedeliver a webhook event
polar_create_refundwriteRefund an order
polar_cancel_subscriptionwriteCancel a subscription
polar_create_checkout_linkwriteCreate a checkout link
polar_sh_usage_statusmetaUsage status (free-tier meter)
polar_sh_request_featuremetaRequest a missing feature
polar_sh_upgrademetaUpgrade to Pro or Pro+
polar_sh_cancel_subscriptionmetaCancel the Pro subscription

read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage, manage your subscription or send a feature request.

Pricing

PlanPriceLimit
Free$050 tool calls / month
Pro$9/mo or $90/yr (2 months free)Unlimited*

\*Pro has a fair use limit of 10,000 tool calls a month on this server. For more, write to support@usefulapi.io.

Pro covers this server only. Subscribe with polar_sh_upgrade (it returns a Stripe Checkout link). Cancel any time with polar_sh_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running polar_sh_upgrade before then undoes the cancel. Or write to support@usefulapi.io.

License

MIT