Billy MCP by usefulapi MCP Tools

• billy_get_organization

  billy get organization

• billy_list_contacts

  billy list contacts

• billy_get_contact

  billy get contact

• billy_list_invoices

  billy list invoices

• billy_get_invoice

  billy get invoice

• billy_list_bills

  billy list bills

• billy_get_bill

  billy get bill

• billy_list_products

  billy list products

• billy_get_product

  billy get product

• billy_list_accounts

  billy list accounts

• billy_list_tax_rates

  billy list tax rates

• billy_list_bank_lines

  billy list bank lines

• billy_list_postings

  billy list postings

• billy_create_contact

  billy create contact

• billy_create_draft_invoice

  billy create draft invoice

This list was read from the server itself, by connecting to it and calling tools/list on 12 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.