Is this customer's VAT number valid, and which rate applies to this sale?
VAT Sense connects Memtro to VAT checks and rates. It checks a VAT or EORI number against the live government register, with the registered company name and address and how well it matches the details you hold. It reads VAT and GST rates by country, product type or IP address, works out VAT on a price, converts currency at HMRC or ECB rates, and reads invoices made through the API. When asked and granted by name, it can create an invoice, add lines, and delete an invoice or a line. Every call counts against your plan's allowance.
Ask in plain English from chat, your editor, a scheduled job or your own agent. The model picks the right VAT Sense tool, reads what it needs, and answers with the source cited.
These tools change something in VAT Sense. The model is told to use them only when you ask for exactly that, and an administrator grants each one by name to the teams that may use it; a personal connection acts only after its owner allows it.
Turn events on in the connection's Events tab on the Connections page, then add the address it shows as a webhook in VAT Sense, choosing the same kinds; the tab shows VAT Sense's own steps. Each event can start a job, with the event as its input. VAT Sense signs every delivery, and one whose signature does not check out is refused before it is read.
Events and webhooksOnce VAT Sense is connected, these are the kinds of things people ask. Plain questions, no syntax. If the answer lives partly in another system you have connected, Memtro looks there too.
VAT Sense + MemtroIs GB123456789 a valid VAT number, and does it belong to Northwind Ltd?
What is the VAT rate on ebooks in Germany?
How much VAT is due on a 250 euro sale to a customer in France?
How many VAT Sense requests do we have left this month?
Raise a VAT invoice for BigCo for two days of consulting
Sarah Chen, finance manager at Acme Ltd, asked whether a new EU customer's VAT number was valid and matched the company name on their order. Memtro checked it against VIES and reported it valid, with the registered name and a likely match.
Tom Reilly, operations lead at Northwind, asked Memtro to raise a VAT invoice for a sale to a customer in Ireland. Memtro created it at VAT Sense, which worked out the totals and numbered it. The invoice was stored at VAT Sense and nobody was sent anything.
The teams that lean on VAT Sense most, a question each of them asks, and what they connect beside it.
A record in VAT Sense is rarely the whole story. Connect the systems that hold the rest and Memtro checks them together, then remembers what it learned so the next question starts further along.
Using something else for the same job, or both? Each connector has its own tools; connect as many as you like.
NetSuite
Ramp
FreeAgent
Holded
Mollie
QuickFile
Recurly
Airwallex
Maxio
Pennylane
Charity Commission (England and Wales)
Checkout.com
FCA Register
Soldo
Spendesk
Lago
Recharge
Katana
Chaser
Unleashed
Printful
Orb
Quaderno
Donorbox
Avalara AvaTax
Billy
Cin7 Core
Codat
ComplyAdvantage
inFlow Inventory
Metronome
MRPeasy
Persona
Precoro
Printify
Rydoo
Saleor
Snipcart
Swell
Veeqo
Zuora
PaystackIn VAT Sense, open Dashboard → API keys.
Create a key named Memtro and copy it, as it is shown once. A live key checks real numbers and counts against your allowance, while a test key answers only VAT Sense's test numbers. If the key has an allowed-IP list, Memtro's address must be on it.
In Memtro, open Connections → VAT Sense and paste it into API key.
Ask your first question: is GB123456789 a valid VAT number, and does it belong to Northwind Ltd?
Chat in the dashboard, the OpenAI-compatible API, scheduled jobs, and any MCP client: Claude Code, OpenCode, Cursor, Claude Desktop. The VAT Sense tools are the same everywhere.
Only when you ask, and only what it has been granted: create a VAT invoice from the business's details and its lines (stored at VAT Sense, not sent to anybody); add lines to an existing VAT invoice; delete a VAT invoice (permanent); delete one line from a VAT invoice (permanent). Every other tool reads, searches or lists. The Connections page labels the tools that act, an administrator grants each one by name to the teams that may use it, and a personal connection acts only after its owner allows it.
A personal connection serves only your own requests. A shared connection serves the organisation: everyone, or only the teams an admin chooses. Admins can always add shared connections; other members need the permission.
Credentials are encrypted at rest. Tool results are cached briefly so agent loops do not repeat identical calls, and the facts the model extracts are saved to your organisation's memory with provenance (system, record and link) so they can be checked and superseded.
API key. In VAT Sense, open Dashboard → API keys.
Yes. Turn events on in the connection's Events tab on the Connections page, then add the address it shows as a webhook in VAT Sense, choosing the same kinds; the tab shows VAT Sense's own steps. A job set to start "When an event arrives" then runs once for each matching event, with the event as its input. The run treats the event as outside data, never as instructions, and anything the run remembers is kept as unverified.
Seven-day free trial, then one monthly price per organisation. Connectors, jobs and memory are never metered.
Sign in, add a provider key, create an API key and point your tools at Memtro. It takes about five minutes.
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