Read checkout sessions; create payment links, expire sessions and refund payments in Qashier. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
Turn on the Qashier connector, then ask in plain words. The AI picks the tools.
For merchants that take online payments with Qashier.
List the checkout sessions, newest first, with status and amount. Find the sessions that wait for payment.
Read one checkout session to see the payment status, the payment method and any refunds.
Create a checkout session for one item with the amount and get the payment URL to give to the customer. Nothing is charged until the customer pays.
Changes dataExpire an open checkout session so that the customer can no longer pay it.
Changes dataCheck the session first, then refund the paid amount or a part of it to the original payment method.
Changes dataThe login page asks for your Qashier API key.
Find it in your Qashier Dashboard under API keys. Your key is used only to call the Qashier API on your behalf and to derive a private account id; it is never shown to anyone.
Team and Enterprise: an Owner adds the connector for the organization first.
No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.
Run this command, then run /mcp in Claude Code to log in:
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"qashier": {
"url": "https://qashier.usefulapi.io/mcp"
}
}
} Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"qashier": {
"type": "http",
"url": "https://qashier.usefulapi.io/mcp"
}
}
} Run these commands. The second one opens the login page:
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.
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 Qashier API key. 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.
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 tool calls / month |
| Proper user | $9/mo · $90/yr | 10,000 tool calls / month |
| Pro+per user | $39/mo · $390/yr | 100,000 tool calls / month |
Each paid plan covers this Qashier server only. Ask your AI to run qashier_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 qashier_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 qashier_upgrade before then undoes the cancel. Or write to [email protected].
qashier_list_checkout_sessionsqashier_get_checkout_sessionqashier_create_checkout_sessionqashier_expire_checkout_sessionqashier_refund_paymentqashier_usage_statusqashier_request_featureqashier_upgradeqashier_cancel_subscriptionSee the open checkout sessions. Check if an order was paid. Create a payment link for a customer. Cancel a payment link that you do not need. Refund a payment in full or in part. See what you can do for the details.
No. usefulapi is an independent service. It is not affiliated with or endorsed by Qashier. The server calls the Qashier API with your own Qashier access, so it sees only the data that your account can see.
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.
The login page asks for your Qashier API key. See Before you connect for where to find it.
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 Qashier API key. 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.
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Qashier 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 Qashier.
Yes, if you approve it. 3 of the 5 Qashier tools can create or change data. The other 2 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.
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 Qashier server only. Cancel any time: your paid plan then runs to the end of the paid period. Run qashier_usage_status to see how many calls you used.
Ask the AI to run qashier_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 qashier_cancel_subscription. Your paid plan continues to the end of the paid period.
Tell the AI what you wanted to do. It can send the request with qashier_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.
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.