FastBill MCP by usefulapi MCP Tools

• fastbill_list_customers

  fastbill list customers

• fastbill_get_customer

  fastbill get customer

• fastbill_list_contacts

  fastbill list contacts

• fastbill_list_invoices

  fastbill list invoices

• fastbill_get_invoice

  fastbill get invoice

• fastbill_list_recurring_invoices

  fastbill list recurring invoices

• fastbill_list_estimates

  fastbill list estimates

• fastbill_list_expenses

  fastbill list expenses

• fastbill_list_revenues

  fastbill list revenues

• fastbill_list_articles

  fastbill list articles

• fastbill_list_projects

  fastbill list projects

• fastbill_list_time_entries

  fastbill list time entries

• fastbill_list_templates

  fastbill list templates

• fastbill_create_customer

  fastbill create customer

• fastbill_update_customer

  fastbill update customer

• fastbill_create_invoice

  fastbill create invoice

• fastbill_complete_invoice

  fastbill complete invoice

• fastbill_set_invoice_paid

  fastbill set invoice paid

• fastbill_create_estimate

  fastbill create estimate

• fastbill_create_article

  fastbill create article

• fastbill_create_project

  fastbill create project

• fastbill_create_time_entry

  fastbill create time entry

This list was read from the server itself, by connecting to it and calling tools/list on 26 October 2026. It is what the server actually exposes, not what its listing claims.

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.