Integration · Company data
Connect Claude & ChatGPT to 44API
Ask your AI whether a customer's VAT number is valid before you invoice them, or which company a tax ID belongs to. With 44API it checks VAT numbers and tax IDs by number and two-letter country code, and returns the registered company details where they are available.
Free plan, no credit card. Takes about a minute.
Try asking
“Is DK12345678 a valid VAT number?”
The AI checks the number with country code DK and tells you whether it is valid.
“Which company is registered under this German VAT number?”
It validates the number with country code DE and shows the registered company details where available.
“Check the VAT number on this new customer before I create the invoice.”
It validates the number and country code from the customer details and reports the result.
What your AI can do
VAT and tax ID checks
Check whether a VAT number or tax ID is valid, by number and two-letter country code.
Company details
Get the registered company details for a valid number, where the source has them.
Part of your other work
Use the check in the middle of a chat, for example while preparing an invoice or reviewing a new customer or supplier.
“Here are five supplier VAT numbers. Which ones are not valid?”
It checks each number in turn and lists the ones that fail.
“Does the company name on this order match its VAT registration?”
It validates the VAT number and compares the registered company details with the name you gave.
“Is this tax ID still valid?”
It runs a fresh check on the number and country code and gives you the current result.
1 tools for 44API
These tools are switched on when you connect. You can switch any of them off, or require your approval before it runs.
validate_vat_numberDeletesCheck whether a VAT number or tax ID is valid, by `vat_number` and 2-letter `country_code`, and get the registered company details where available.
Set up in three steps
- 1
Pick the app
Create a free PipMCP account and choose 44API from the app list.
- 2
Paste your key
Paste your 44API API key. Sign up or log in at dashboard.44api.dev and copy your API key from the dashboard. According to 44API, its free plan includes 250 requests per month.
- 3
Add the link to your AI
You get a personal MCP link. Add it to Claude, ChatGPT or Cursor:
- Click your name, then Settings › Connectors › Add custom connector.
- Paste your link as the Remote MCP server URL.
- Switch it on from the + menu in a chat.
Questions
What can the AI do in 44API?
The AI can check whether a VAT number or tax ID is valid, by the number and a two-letter country code, and get the registered company details where available. That is the one tool this connection offers.
Does the AI see my 44API credentials?
No. Your 44API API key is encrypted at rest and never shown to the AI. After you save it, it is not shown again, not even to you. The AI only sees the results of the tools it calls.
Can I control what the AI is allowed to do?
Yes. You choose whether the tool is switched on, and you can require your approval before each check runs, for example to keep an eye on your 44API usage. Every tool call is logged.
Does it work with ChatGPT?
Yes. In ChatGPT go to Settings › Apps & Connectors › Advanced and turn on Developer mode, then add your PipMCP link. Developer mode needs a paid ChatGPT plan: Plus, Pro, Business or Enterprise. The same link also works in Claude (Settings › Connectors › Add custom connector), Cursor and other MCP clients.
What does it cost?
PipMCP has a free plan with no credit card required. Paid plans bill per completed task. You also need your own 44API account.
Where do I find my 44API key?
Sign up or log in at dashboard.44api.dev and copy the API key shown in the dashboard. According to 44API, the free plan includes 250 requests per month.
Related integrations
Let your AI work in 44API today.
Start free. Your key stays encrypted, and you decide what the AI may do.
Connect 44API freePipMCP is not affiliated with 44API. Product names are trademarks of their owners.