MCP server for ABRA Flexi — accounting, contacts, stock and draft-checked invoice creation. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
Turn on the ABRA Flexi connector, then ask in plain words. The AI picks the tools.
For accounting teams with ABRA Flexi Cloud and a dedicated REST API user.
List issued invoices and inspect a received invoice with its line items.
Read products, stock cards and stock movements to investigate availability and pricing.
Read bank statement lines and cash-desk movements for a selected period. These tools do not execute payments.
Inspect the customer and validate invoice input with dry_run before saving. Saving may book accounting entries or affect stock according to the document type.
Changes dataThe login page asks for your ABRA Flexi Cloud instance, Company id, API user name and API user password.
The instance is the first part of your cloud address (https://yourname.flexibee.eu); the company id is the part after /c/ (for example https://yourname.flexibee.eu/c/acme_s_r_o_). Create a dedicated user for this connection in ABRA Flexi (as ABRA recommends for every integration); the Přístup k API service must be active (Nastavení → Licence a předplatné). Only ABRA Flexi Cloud instances on flexibee.eu are supported. Use a dedicated REST API user restricted to this company and the permissions you need. Requested accounting, customer, stock and bank data passes to your chosen AI client and its LLM provider. Three write tools create or update contacts and create issued invoices; an invoice may be booked or affect stock according to its document type. Use dry_run to validate before saving. This server does not send invoices, execute payments or delete records. Disable this API user or change its password in Flexi to stop vendor access. Billing follows the verified instance/company and survives password rotation. Your vendor API quota and possible overage fees still apply.
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": {
"abra-flexi": {
"url": "https://abra-flexi.usefulapi.io/mcp"
}
}
} Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"abra-flexi": {
"type": "http",
"url": "https://abra-flexi.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 ABRA Flexi Cloud instance, Company id, API user name and API user password. 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 cloud instance and company | $9/mo · $90/yr | 10,000 tool calls / month |
| Pro+per cloud instance and company | $39/mo · $390/yr | 100,000 tool calls / month |
Each paid plan covers this ABRA Flexi server only. Ask your AI to run abraflexi_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 abraflexi_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 abraflexi_upgrade before then undoes the cancel. Or write to [email protected].
abraflexi_get_companyabraflexi_list_evidencesabraflexi_list_issued_invoicesabraflexi_get_issued_invoiceabraflexi_list_received_invoicesabraflexi_get_received_invoiceabraflexi_list_contactsabraflexi_get_contactabraflexi_list_productsabraflexi_list_stock_cardsabraflexi_list_stock_movementsabraflexi_list_bank_movementsabraflexi_list_cash_movementsabraflexi_list_ordersabraflexi_list_recordsabraflexi_get_recordabraflexi_create_contactabraflexi_update_contactabraflexi_create_issued_invoiceabraflexi_usage_statusabraflexi_request_featureabraflexi_upgradeabraflexi_cancel_subscriptionReview issued and received invoices. Check stock and pricing. Review bank and cash movements. Prepare an issued invoice. See what you can do for the details.
No. usefulapi is an independent service. It is not affiliated with or endorsed by ABRA Flexi. The server calls the ABRA Flexi API with your own ABRA Flexi 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 ABRA Flexi Cloud instance, Company id, API user name and API user password. 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 ABRA Flexi Cloud instance, Company id, API user name and API user password. 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 ABRA Flexi 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 ABRA Flexi.
Yes, if you approve it. 3 of the 19 ABRA Flexi tools can create or change data. The other 16 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 ABRA Flexi server only. Cancel any time: your paid plan then runs to the end of the paid period. Run abraflexi_usage_status to see how many calls you used.
Ask the AI to run abraflexi_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 abraflexi_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 abraflexi_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.