A-Cube MCP by usefulapi
Connect
- Claude (claude.ai, Desktop): open Customize → Connectors, click + Add → Add custom connector, and paste
https://acube.usefulapi.io/mcp.
- Claude Code:
claude mcp add --transport http acube https://acube.usefulapi.io/mcp, then run /mcp to log in.
- VS Code: Add to VS Code.
- Cursor and other clients: add the URL as a remote MCP server:
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, and the login page asks for your A-Cube credentials.
Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/acube/
Tools
read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage, manage your subscription or send a feature request.
Pricing
*Pro has a fair use limit of 10,000 tool calls a month on this server. For more, write to [email protected].
Pro covers this server only. Subscribe with acube_upgrade (it returns a Stripe Checkout link). Cancel any time with acube_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running acube_upgrade before then undoes the cancel. Or write to [email protected].
License
MIT
Account access and data
Use your licensed A-Cube API account and select sandbox or production. Your production Italy API contract must permit this hosted connection. Customer onboarding, vendor subscriptions and fiscal processing charges remain separate. No vendor app approval or endorsement is claimed.
Your password is sent only for this sign-in and is not stored in the hosted connection. Only the vendor JWT, email, environment, expiry and billing identity are retained encrypted. Vendor tokens last up to24hours; reconnect on expiry or revocation. There is no silent password login or invented refresh endpoint. Disconnect UsefulAPI to stop this connection; an issued JWT may remain valid until A-Cube expires or revokes it. Billing follows the validated account UID, normally across password changes and environments.
Requested fiscal invoices, tax identifiers, receipts and business records reach your connected AI client and LLM provider. Connect only data you are authorized to process there.
Draft creation saves a draft without transmission. Submission and deletion require explicit confirmation; without it, the tools return a preview. Production submission is a legal act and may incur charges. A-Cube's acknowledgement means accepted for transmission, not confirmed SDI delivery: check invoice notifications. After an uncertain result, check A-Cube before repeating. No operation is automatically replayed.
All24tools were checked against current API specifications and local mocks. Synthetic invoice test data matches required fields/types but is not a legally validated invoice. No real customer data, SDI submissions, receipts or charges were tested.