Polar MCP server

Products, customers, orders, subscriptions, benefits, revenue metrics and refunds. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.

Connect PolarFree 50 tool calls / monthPro $9/mo · $90/yr · pricing30 tools

What can I ask?

Turn on the Polar connector, then ask in plain words. The AI picks the tools.

What was our revenue and MRR for the last 3 months?
List our cancelled subscriptions with their customer and cancellation date.
List this week's orders with the customer and amount.
Create a checkout link for my Pro plan product.

What you can do with Polar in Claude and ChatGPT

For software makers and creators who sell products and subscriptions with Polar.

Check revenue and MRR over a period

The AI reads revenue metrics over a date range, by interval: orders, revenue, MRR and active subscriptions. You get a short trend report.

Find cancelled subscriptions and their customers

The AI lists subscriptions by status, active state or cancellation window. You see who cancelled and from which product.

See what a customer has right now

The AI finds a customer by email or text, and reads their state: active subscriptions and granted benefits. You can answer a support question fast.

Review recent orders

The AI lists orders by customer, product, status or date window and opens one with line items, discount and tax.

Refund an order or create a checkout link

The AI refunds an order in full or in part, which moves real money, or creates a reusable checkout link for products.

Changes data

How do I connect Polar?

Before you connect

The login page asks for your Polar access token.

Create one in Polar → Settings → Personal Access Tokens. Your token is used only to call the API on your behalf and to derive a private account id; it is never shown to anyone.

Claude claude.ai · Desktop

Open Customize → Connectors, then click + Add → Add custom connector.
Enter the name Polar and this URL, then click Add:
https://polar-sh.usefulapi.io/mcp
Claude opens the login page: enter your Polar access token.
In a chat, click + → Connectors and turn on Polar.

Team and Enterprise: an Owner adds the connector for the organization first.

ChatGPT chatgpt.com

Open Plugins, click +, then Add custom MCP server.
Enter the name Polar and this URL, choose OAuth as the authentication, confirm the warning and create it:
https://polar-sh.usefulapi.io/mcp
ChatGPT opens the login page: enter your Polar access token.
In Plugins, install Polar, then choose it in a chat.

No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.

Claude Code

Run this command, then run /mcp in Claude Code to log in:

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

Cursor

Add to Cursor or add this to ~/.cursor/mcp.json:

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

VS Code

Add to VS Code or add this to .vscode/mcp.json:

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

Codex

Run these commands. The second one opens the login page:

codex mcp add polar-sh --url https://polar-sh.usefulapi.io/mcp

codex mcp login polar-sh

Other clients

Windsurf, Cline, Zed and other MCP clients: add this URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser.

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: the login page asks for your Polar access token. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.

Pricing

Plan	Price	Limit
Free	$0	50 tool calls / month
Pro	$9/mo · $90/yr	10,000 tool calls / month
Pro+	$39/mo · $390/yr	100,000 tool calls / month

Each paid plan covers this Polar server only. Ask your AI to run polar_sh_upgrade and choose Pro or Pro+, billed monthly or yearly (it returns a Stripe Checkout link). If you already have Pro, ask to change it to Pro+. The change requires your confirmation, keeps your billing interval and charges the price difference for the rest of the period immediately. Cancel any time with polar_sh_cancel_subscription: your paid plan continues to the end of the paid period, with no refund for the current period, and asking to resume the same plan with polar_sh_upgrade before then undoes the cancel. Or write to [email protected].

Tools 30

Show all 30 tools (the AI picks them for you)

Read only · 22

List organisationspolar_list_organizations
List the organisations the token can act for. Start here — most other tools take an organization_id.
List productspolar_list_products
List products, optionally filtered by archived state, recurrence or a text query.
Get one productpolar_get_product
Fetch a single product with its prices and attached benefits.
List customerspolar_list_customers
List customers, optionally by email or a text query.
Get one customerpolar_get_customer
Fetch a single customer by Polar id.
Get a customer's full statepolar_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?'.
Get a customer's state by your own idpolar_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.
List orderspolar_list_orders
List orders, filtered by customer, product, subscription, status or a date window.
Get one orderpolar_get_order
Fetch a single order with its line items, discount and tax.
List subscriptionspolar_list_subscriptions
List subscriptions, filtered by customer, product, status, active state or cancellation window.
Get one subscriptionpolar_get_subscription
Fetch a single subscription with its product, price and period.
Get revenue metricspolar_get_metrics
Fetch revenue and subscription metrics over a date range, bucketed by interval — orders, revenue, MRR, active subscriptions.
List benefitspolar_list_benefits
List benefits — the things a product grants, such as licence keys, file downloads or Discord roles.
List grants of a benefitpolar_list_benefit_grants
List who has been granted one benefit, and whether the grant is still active.
List discountspolar_list_discounts
List discount codes and their redemption limits.
List refundspolar_list_refunds
List refunds, filtered by order, subscription, customer or success.
List licence keyspolar_list_license_keys
List issued licence keys and their status.
List usage meterspolar_list_meters
List the usage meters that aggregate events into billable quantities.
Get a meter's quantitiespolar_get_meter_quantities
Fetch the aggregated quantities a meter has recorded over a window — what usage-based billing will charge for.
List usage eventspolar_list_events
List the raw usage events ingested for metering, filtered by customer, meter, name or time.
List webhook deliveriespolar_list_webhook_deliveries
List webhook delivery attempts with their HTTP results — the tool for 'why did my webhook not arrive?'.
List webhook endpointspolar_list_webhook_endpoints
List the configured webhook endpoints and their subscribed events.

Changes data · 4

Redeliver a webhook eventpolar_redeliver_webhook_event
Queue one webhook event for redelivery after your endpoint recovered.
Refund an orderpolar_create_refund
Refund an order, in full or in part. This moves real money back to the customer.
Cancel a subscriptionpolar_cancel_subscription
Cancel a subscription at the end of its current period. The customer keeps access until then.
Create a checkout linkpolar_create_checkout_link
Create a reusable checkout URL for one or more products — the link you put in a page or an email.

Your usefulapi plan · 4

Usage status (free-tier meter)polar_sh_usage_status
Report the caller's current usage: the plan, calls used this month, the limit of the plan (the free monthly cap or the Pro fair use limit), remaining, and whether the limit is reached. Read-only; does not count against the meter.
Request a missing featurepolar_sh_request_feature
Tell usefulapi that the user needs something the Polar tools cannot do yet (a missing tool, field or filter). Call it only when the user asks for something none of the tools can do, and tell the user that you send the request. Do not call it for errors or for normal requests. Do not include personal data, credentials or customer records. Stored with the product name and the client type (for example Claude or Cursor), without the user's account. At most 5 requests per day. Does not count against the meter.
Upgrade to Pro or Pro+polar_sh_upgrade
Get a paid plan for Polar (the free tier caps monthly usage). Pro: 10,000 tool calls a month, for normal use — plan "monthly" ($9/month) or "yearly" ($90/year, 2 months free). Pro+: 100,000 tool calls a month, for automations and heavy use — plan "plus" ($39/month) or "plus_yearly" ($390/year). Without a plan it returns both Pro and Pro+, each with a payment link, for the user to choose; with a plan, one link. An existing Pro subscription changes to Pro+ in place (needs confirm: true; the price difference for the rest of the period is charged at once). Cancel any time: the plan then runs to the end of the paid period, so it also suits a one-time job. A link opens Stripe Checkout in the browser; after payment the account upgrades automatically. Does not count against the meter.
Cancel the Pro subscriptionpolar_sh_cancel_subscription
Cancel the caller's Polar Pro subscription at the end of the paid period (no refund for the current period; Pro continues until then, then the free tier applies). Requires confirm: true. Run polar_sh_upgrade later to undo the cancel before the period ends. Does not count against the meter.

FAQ

What can I do with Polar in Claude or ChatGPT?

Check revenue and MRR over a period. Find cancelled subscriptions and their customers. See what a customer has right now. Review recent orders. Refund an order or create a checkout link. See what you can do for the details.

Is this an official Polar product?

No. usefulapi is an independent service. It is not affiliated with or endorsed by Polar. The server calls the Polar API with your own Polar access, so it sees only the data that your account can see.

Can I connect Polar to Claude or ChatGPT?

Yes. In Claude, add this server's URL as a custom connector. In ChatGPT, add it as a custom MCP server in Plugins. Then log in once. Cursor, VS Code, Claude Code and Codex work too. See the setup steps.

What do I need to connect?

The login page asks for your Polar access token. See Before you connect for where to find it.

Do I put my Polar key or an Authorization header in the client config?

No. 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: the login page asks for your Polar access token. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.

How do you keep my Polar credentials?

The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Polar API for you and to derive a private account id for usage metering. usefulapi does not show them on any page or in any reply. To stop all access, remove the connector and change or delete these credentials in Polar.

Can the AI change my Polar data?

Yes, if you approve it. 4 of the 26 Polar tools can create or change data. The other 22 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.

What does it cost?

The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with 10,000 tool calls / month. Pro+ costs $39/mo or $390/yr, with 100,000 tool calls / month. Each subscription covers this Polar server only. Cancel any time: your paid plan then runs to the end of the paid period. Run polar_sh_usage_status to see how many calls you used.

How do I subscribe or cancel?

Ask the AI to run polar_sh_upgrade and choose Pro or Pro+, billed monthly or yearly: it returns a Stripe Checkout link. If you already have Pro, ask to change it to Pro+. After you confirm, your existing subscription changes in place, keeps its billing interval and charges the price difference for the rest of the period immediately. To cancel, run polar_sh_cancel_subscription. Your paid plan continues to the end of the paid period.

What if a Polar tool that I need is missing?

Tell the AI what you wanted to do. It can send the request with polar_sh_request_feature. We store the text with the server name, the type of AI client and the tool you tried, not with your account, and read every request when we plan new tools. You can send up to 5 requests per day.

Which AI clients can I use?

Any client that supports remote MCP servers (Streamable HTTP) with OAuth login: Claude (web and desktop), Claude Code, ChatGPT, Codex, Cursor, VS Code, Windsurf and others.

This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.

Need a tool this server does not have, or a connection to another system? We build custom integrations and MCP servers.

More Payments & Billing MCP servers

All Payments & Billing servers →