Read e-invoices and payments, hosting packages, domains, DNS and web usage in Play Systems. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
Turn on the Play Systems connector, then ask in plain words. The AI picks the tools.
For Greek businesses and their accountants that issue e-invoices and run hosted websites with Play Systems.
List the e-invoices of an issuer VAT number, with an optional invoice type and date range. Open one invoice to read its lines, totals and status.
Find the invoice by its 15-digit MARK. Then list the payments recorded against that invoice.
Read the plan, status and limits of a hosting package. Then read its bandwidth, disk, database and mail counts.
Read the name, expiry and status of a domain on a hosting package. Then read its DNS records and the suggested nameservers.
Search a domain name or prefix to see if it is available, with its price and expiry. The server does not order or renew domains.
The login page asks for your Play Systems API key and Issuer VAT number (9 digits).
The key is issued to you by Play Systems and shown once at creation. Ask Play Systems for a new key if you lost it. Your key is used only to call the API on your behalf and to derive a private account id.
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": {
"play-systems-api": {
"url": "https://play-systems-api.usefulapi.io/mcp"
}
}
} Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"play-systems-api": {
"type": "http",
"url": "https://play-systems-api.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 Play Systems API key and Issuer VAT number (9 digits). 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 Play Systems server only. Ask your AI to run playsystemsapi_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 playsystemsapi_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 playsystemsapi_upgrade before then undoes the cancel. Or write to [email protected].
playsystemsapi_list_invoicesplaysystemsapi_get_invoiceplaysystemsapi_list_invoice_paymentsplaysystemsapi_get_packageplaysystemsapi_get_web_usageplaysystemsapi_get_domainplaysystemsapi_get_domain_dnsplaysystemsapi_search_domainsplaysystemsapi_usage_statusplaysystemsapi_request_featureplaysystemsapi_upgradeplaysystemsapi_cancel_subscriptionReview the e-invoices issued for a VAT number. Check the payments recorded on an e-invoice. Check the web usage of a hosting package. Review the DNS records of a domain. Check whether a domain name is available. See what you can do for the details.
No. usefulapi is an independent service. It is not affiliated with or endorsed by Play Systems. The server calls the Play Systems API with your own Play Systems 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 Play Systems API key and Issuer VAT number (9 digits). See Before you connect for where to find them.
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 Play Systems API key and Issuer VAT number (9 digits). 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 Play Systems 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 Play Systems.
All 8 Play Systems tools are marked read-only.
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 Play Systems server only. Cancel any time: your paid plan then runs to the end of the paid period. Run playsystemsapi_usage_status to see how many calls you used.
Ask the AI to run playsystemsapi_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 playsystemsapi_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 playsystemsapi_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.