Invoice Generator by FieldHive

By FieldHive Ltd

Overview

Invoice generator for tradespeople and small businesses. It does one job: it creates invoices you can send to your customers. Describe the job in your own words, for example "two days labour at £350 a day and £180 of materials", and an editable invoice opens in the chat with the totals and tax already calculated. Edit any field on screen or keep talking ("add 3 hours to the kitchen section", "the customer is Jane Smith") and the same invoice updates in place. Split a job into sections, such as rooms or stages, each with its own subtotal. Upload your logo and the editor picks out your brand colours. Choose a layout (full breakdown, materials and labour summary, or simple), then download the PDF. Totals and tax are calculated by the tool, not by the AI, using each country's own rounding rules. Supports the UK, US, Canada, Australia, New Zealand, Ireland, Germany, France, the Netherlands, Spain and Italy, with the right currency, date format, paper size and tax labels (VAT, GST, HST, sales tax). The assistant only fills in details you give it, and never invents names, addresses, tax numbers or bank details. No account or sign-in needed. Invoices are kept only while you work (deleted 2 hours after your last change) and PDF links expire after 30 minutes. The tool does not send invoices or emails, or take payments. Optionally, you can tick a box to share an invoice's prices with FieldHive pricing data, with names and contact details removed. It is unticked by default and only you can tick it.

Tools

create_invoice

ChatGPT

Use this when someone wants to create, make, write, generate or draft a NEW invoice, or asks for an invoice template, to bill a customer, for example for hours or days of labour and for materials or parts, optionally split into sections (areas or stages of the job). Opens an editable invoice with totals and tax calculated by the tool, a preview and a PDF download. Works with no details yet: it opens a blank invoice the user can fill in, so call it straight away rather than asking questions first. Supports the UK, US, Canada, Australia, New Zealand, Ireland, Germany, France, the Netherlands, Spain and Italy. Pass only details the user has actually given. Leave out anything unknown; never invent names, addresses, tax registration numbers or bank details. The result lists what is still missing. Do not calculate totals or tax yourself; use the figures this tool returns. Call once per invoice; to change it afterwards use update_invoice. Do not use for quotes or estimates, receipts, purchase orders, or for sending, emailing or collecting payment on an invoice.

download_invoice_pdf

ChatGPT

Used by the invoice editor's Download PDF button. Not for the assistant.

get_invoice_pdf

ChatGPT

Use this when the user asks to download, save, print or export the invoice as a PDF. Pass the invoiceId. Returns a private download link that expires after 30 minutes. It does not send the invoice to anyone. Incomplete invoices are watermarked DRAFT. A logo uploaded in the editor is only included when the user presses Download PDF in the editor itself.

get_invoice_state

ChatGPT

Used by the invoice editor to stay in sync. Not for the assistant.

restore_invoice_state

ChatGPT

Used by the invoice editor to re-create its invoice after the server lost it. Not for the assistant.

save_invoice_state

ChatGPT

Used by the invoice editor to save the user's edits. Not for the assistant.

update_invoice

ChatGPT

Use this to change an invoice that is already open: add, change or remove items and labour, add or rename sections, or fill in details such as the customer, business, dates, invoice number, tax or bank details as the user gives them. The open editor on screen updates in place. Refer to existing items and sections by the [id] shown in the latest summary. Only include what the user said; never invent personal, tax or bank details.