--- title: "inFakt API: connect it to your AI chat ยท Hypamoon" description: "The inFakt API is open, signs in with an API key and sends webhooks. What your AI chat can build with it on Hypamoon, with sources." url: https://hypamoon.com/connect-to/infakt --- 1. [Connect to](https://hypamoon.com/connect-to) 2. inFakt ERP and accounting # Connect inFakt to Hypamoon Yes. inFakt has a public, versioned API and you create the key yourself, so your chat can write the adapter. Open ## The check Three questions about the API of inFakt, answered from its own docs. **Public API docs**\ **Yes.** Public REST and JSON API documentation with a sandbox. [Read the docs](https://www.infakt.pl/developers/) **A key you create yourself**\ **Yes.** Create an API key yourself in Settings > API, with a description and a chosen set of permissions. [pomoc.infakt.pl](https://pomoc.infakt.pl/hc/pl/articles/20640677983506-Dodawanie-nowego-klucza-API) **Versions or a changelog**\ **Yes.** Numbered API versions (v3), with older versions announced for shutdown. [infakt.pl](https://www.infakt.pl/blog/infakt-api-przejdz-na-wersje-3/) **How it signs in**\ An API key in the X-inFakt-ApiKey header, limited to the permissions you chose when creating it. **Webhooks**\ **Yes.** It can tell your app when something changes. [pomoc.infakt.pl](https://pomoc.infakt.pl/hc/pl/articles/14603132974866-Co-to-webhooki) **Hosting**\ Cloud ## In practice What it takes in a real inFakt administration. **Getting access**\ You create an API key in inFakt under Settings > API, enter your password, choose its permissions and generate it. **Limits**\ None published. **Writing**\ **Read and write.** Create invoices, clients and products with a key that has write permission; invoices go through an asynchronous endpoint. **Cost**\ Not published. ## Your own client portal on inFakt, with invoices and payments in one place. - Clients, invoices, products and payments, straight from inFakt. - AI that drafts invoices from orders and follows up unpaid invoices, with you approving every change. - A portal for your clients and a short weekly email for you. ### Ask your chat Answers straight from your inFakt data, in Claude or another chat with the full Hypamoon connection. - Which invoices are unpaid after their due date? - How much did we invoice per client this quarter? ### When something happens inFakt sends a webhook to your app for some events, and the app asks AI what happens next. For the rest an agent checks every 15 minutes. 1. When An invoice changes in inFakt. AI decides AI checks whether it was paid, is late or needs a correction. Then You get an email when a client needs a reminder. 2. Every 15 minutes New orders from your own web form that are not invoiced yet. AI decides AI matches the client and the services and checks the VAT. Then An invoice is created in inFakt. AI proposes, you approve ### A screen for your team or customers An app on your own address, with sign-in, on top of the same inFakt data. - For your customers Clients sign in and see their own invoices and payment status, straight from inFakt. inFakt stays the core: your chat builds the rest on its API, as an adapter plus an app and agents in your Hypamoon project. Reading starts after you click Allow in the portal. Every change an agent or a chat makes in inFakt waits for your approval, one call at a time. [How adapters work](https://hypamoon.com/docs/adapters) ### Good to know - Your adapter uses a fixed key: you paste it once in the Hypamoon portal, never in the chat, and it only goes to the API host you allow. - Invoices are created asynchronously, so an adapter checks the task status before the invoice is ready. Webhooks are verified once and signed with the X-Infakt-Signature header. ## Try it in your chat Fill in what to read and write, and send it. Say this in your chat > Build the Hypamoon recipe build-an-adapter for inFakt. API docs: https://www.infakt.pl/developers/. Read: \[what\]. Write: \[what, or nothing\]. [Open in Claude](https://claude.ai/new?q=Build%20the%20Hypamoon%20recipe%20build-an-adapter%20for%20inFakt.%20API%20docs%3A%20https%3A%2F%2Fwww.infakt.pl%2Fdevelopers%2F.%20Read%3A%20%5Bwhat%5D.%20Write%3A%20%5Bwhat%2C%20or%20nothing%5D.) In Claude, or another chat with the full Hypamoon connection; adapters are not in ChatGPT yet. You paste the key in the portal, never in the chat. [The full recipe](https://hypamoon.com/r/build-an-adapter) ## Sources Checked on 7 November 2026. - [www.infakt.pl/developers/](https://www.infakt.pl/developers/) - [pomoc.infakt.pl/hc/pl/articles/20640677983506-Dodawanie-nowego-klucza-API](https://pomoc.infakt.pl/hc/pl/articles/20640677983506-Dodawanie-nowego-klucza-API) - [www.infakt.pl/blog/infakt-api-przejdz-na-wersje-3/](https://www.infakt.pl/blog/infakt-api-przejdz-na-wersje-3/) - [pomoc.infakt.pl/hc/pl/articles/14603132974866-Co-to-webhooki](https://pomoc.infakt.pl/hc/pl/articles/14603132974866-Co-to-webhooki) inFakt is a name of its owner, used here only to describe the software. This page is not an official integration and Hypamoon has no partnership with inFakt. Found something that changed? 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Ask the chat to check its API. The same three checks work for any software. Your chat reads the vendor's own docs and tells you what it found. Say this in your chat > Check if \[software\] has an open API that a Hypamoon adapter can use: public API docs, a key or token I can create myself without asking the vendor, and versions or a changelog. Link the pages you used. [Open in Claude](https://claude.ai/new?q=Check%20if%20%5Bsoftware%5D%20has%20an%20open%20API%20that%20a%20Hypamoon%20adapter%20can%20use%3A%20public%20API%20docs%2C%20a%20key%20or%20token%20I%20can%20create%20myself%20without%20asking%20the%20vendor%2C%20and%20versions%20or%20a%20changelog.%20Link%20the%20pages%20you%20used.) [Open in ChatGPT](https://chatgpt.com/?q=Check%20if%20%5Bsoftware%5D%20has%20an%20open%20API%20that%20a%20Hypamoon%20adapter%20can%20use%3A%20public%20API%20docs%2C%20a%20key%20or%20token%20I%20can%20create%20myself%20without%20asking%20the%20vendor%2C%20and%20versions%20or%20a%20changelog.%20Link%20the%20pages%20you%20used.) Fill in the name of your software. Checking needs no connection to Hypamoon. ## Ready to connect inFakt? Connect your chat once, then ask it to build the adapter. [Start free](https://app.hypamoon.com/?mode=signup&utm_source=connect-to&utm_campaign=infakt) Works in Claude, ChatGPT and Copilot. [Add to Claude](https://hypamoon.com/connect?via=connect-to~infakt#claude) [Add to ChatGPT](https://hypamoon.com/connect?via=connect-to~infakt#chatgpt) [Add to Copilot](https://hypamoon.com/docs/microsoft-copilot)