Read customers, products, sales orders, invoices, NF-e and financial entries in Maqplan ERP. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
Turn on the Maqplan ERP connector, then ask in plain words. The AI picks the tools.
For Brazilian businesses that run sales, stock, invoicing and finance in Maqplan ERP.
List the sales orders and the invoices of the ERP. Open one sales order and one customer to read the full details.
Find the product in the product list, then list the stock balances to see what is in stock.
List the NF-e documents and open one to read all its fields. List the fiscal operation natures for reference.
List the financial entries and open one to read its fields. List the chart of accounts and the payment methods for reference.
Read the company of the API key, then list its branches and sellers. Open one branch to read all its fields.
The login page asks for your Maqplan API key.
Create the key in the ERP: API Keys screen, or ask Maqplan support. Each key belongs to one company and one branch, and it sets the scope of every call. Your key is used only to call the 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": {
"erp-saas-maqplan": {
"url": "https://erp-saas-maqplan.usefulapi.io/mcp"
}
}
} Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"erp-saas-maqplan": {
"type": "http",
"url": "https://erp-saas-maqplan.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 Maqplan 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 Maqplan ERP server only. Ask your AI to run maqplan_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 maqplan_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 maqplan_upgrade before then undoes the cancel. Or write to [email protected].
maqplan_get_companymaqplan_list_branchesmaqplan_get_branchmaqplan_list_customersmaqplan_get_customermaqplan_list_peoplemaqplan_get_personmaqplan_list_productsmaqplan_get_productmaqplan_list_stock_balancesmaqplan_list_sales_ordersmaqplan_get_sales_ordermaqplan_list_invoicesmaqplan_get_invoicemaqplan_list_sellersmaqplan_list_fiscal_operationsmaqplan_list_nfemaqplan_get_nfemaqplan_list_financial_entriesmaqplan_get_financial_entrymaqplan_list_payment_methodsmaqplan_list_chart_of_accountsmaqplan_usage_statusmaqplan_request_featuremaqplan_upgrademaqplan_cancel_subscriptionReview sales orders and invoices with their customer. Check stock before you promise a delivery. Read the electronic invoices (NF-e) of the company. Review financial entries against the chart of accounts. Review branches and sellers of the ERP company. See what you can do for the details.
No. usefulapi is an independent service. It is not affiliated with or endorsed by Maqplan ERP. The server calls the Maqplan ERP API with your own Maqplan ERP 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 Maqplan 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 Maqplan 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 Maqplan ERP 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 Maqplan ERP.
All 22 Maqplan ERP 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 Maqplan ERP server only. Cancel any time: your paid plan then runs to the end of the paid period. Run maqplan_usage_status to see how many calls you used.
Ask the AI to run maqplan_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 maqplan_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 maqplan_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.