--- title: "WeFact API: connect it to your AI chat ยท Hypamoon" description: "The WeFact API is open and signs in with an API key. What your AI chat can build with it on Hypamoon, how it connects, and the sources we checked." url: https://hypamoon.com/connect-to/wefact --- 1. [Connect to](https://hypamoon.com/connect-to) 2. WeFact Payments and billing # Connect WeFact to Hypamoon Yes. WeFact 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 WeFact, answered from its own docs. **Public API docs**\ **Yes.** Public API reference in Dutch, with PHP examples. [Read the docs](https://developer.wefact.com/) **A key you create yourself**\ **Yes.** The API key is under Settings, API in WeFact; you also add the IP addresses that may call it. [support.wefact.nl](https://support.wefact.nl/instellingen/extern-de-gegevens-in-benaderen-api) **Versions or a changelog**\ **Yes.** Version 2 API with a dated changelog. [developer.wefact.com](https://developer.wefact.com/changelog) **How it signs in**\ An API key from Settings, API, sent with every POST request to one endpoint; calls only work from IP addresses on the whitelist. **Webhooks**\ **Not confirmed.** **Hosting**\ Cloud ## Your own invoice and subscription overview on WeFact, for your team and your customers. - Debtors, invoices, quotes, subscriptions and products, straight from WeFact. - AI that spots customers who start paying late and drafts a friendly reminder for you to approve. - A portal for your customers and a short weekly email for you. ### Ask your chat Answers straight from your WeFact data, in Claude or another chat with the full Hypamoon connection. - Which invoices are more than 30 days overdue, and for which customers? - Which subscriptions renew next month? ### On a schedule WeFact has no webhooks we could confirm, so an agent checks every 15 minutes and decides what happens next. 1. Every 15 minutes Invoices that passed their due date since the last check. AI decides AI looks at the customer's payment history and decides whether a reminder or a personal call fits. Then You get one email with the list and a draft reminder per customer. ### A screen for your team or customers An app on your own address, with sign-in, on top of the same WeFact data. - For your customers Customers sign in and see their open invoices, quotes and subscriptions from WeFact. WeFact 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 WeFact 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. - The API key gives full access to one administration. Calls only work from whitelisted IP addresses; WeFact explains that 0.0.0.0/0 lifts that restriction for dynamic addresses. Limits are 200 calls per minute and 3,600 per hour per IP address. The API is IPv4 only. ## 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 WeFact. API docs: https://developer.wefact.com/. Read: \[what\]. Write: \[what, or nothing\]. [Open in Claude](https://claude.ai/new?q=Build%20the%20Hypamoon%20recipe%20build-an-adapter%20for%20WeFact.%20API%20docs%3A%20https%3A%2F%2Fdeveloper.wefact.com%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. - [developer.wefact.com/](https://developer.wefact.com/) - [support.wefact.nl/instellingen/extern-de-gegevens-in-benaderen-api](https://support.wefact.nl/instellingen/extern-de-gegevens-in-benaderen-api) - [developer.wefact.com/changelog](https://developer.wefact.com/changelog) WeFact 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 WeFact. Found something that changed? Tell us at [support](https://hypamoon.com/support#contact). ## More in payments and billing - [**Adyen** Open](https://hypamoon.com/connect-to/adyen) - [**Authorize.net** Open](https://hypamoon.com/connect-to/authorize-net) - [**Buckaroo** Unknown](https://hypamoon.com/connect-to/buckaroo) - [**Chargebee** Open](https://hypamoon.com/connect-to/chargebee) - [**Klarna** Open](https://hypamoon.com/connect-to/klarna) - [**Mollie** Open](https://hypamoon.com/connect-to/mollie) - [**MultiSafepay** Open](https://hypamoon.com/connect-to/multisafepay) - [**PayPal** Open](https://hypamoon.com/connect-to/paypal) - [**Recurly** Open](https://hypamoon.com/connect-to/recurly) - [**Stripe** Open](https://hypamoon.com/connect-to/stripe) - [**Pay.** Open](https://hypamoon.com/connect-to/pay-nl) - [**Billit** Open](https://hypamoon.com/connect-to/billit) - [**easybill** Open](https://hypamoon.com/connect-to/easybill) - [**GoCardless** Open](https://hypamoon.com/connect-to/gocardless) - [**Paddle** Open](https://hypamoon.com/connect-to/paddle) - [**Recharge** Open](https://hypamoon.com/connect-to/recharge) - [**Lemon Squeezy** Open](https://hypamoon.com/connect-to/lemon-squeezy) - [**Unzer** Open](https://hypamoon.com/connect-to/unzer) - [**Vipps MobilePay** Open](https://hypamoon.com/connect-to/vipps-mobilepay) - [**Mondu** Possible](https://hypamoon.com/connect-to/mondu) - [**PayPlug** Open](https://hypamoon.com/connect-to/payplug) - [**Billomat** Open](https://hypamoon.com/connect-to/billomat) - [**FastBill** Open](https://hypamoon.com/connect-to/fastbill) - [**Aruba Fatturazione Elettronica** Possible](https://hypamoon.com/connect-to/aruba-fatturazione-elettronica) - [**InvoiceXpress** Open](https://hypamoon.com/connect-to/invoicexpress) - [**Fakturownia** Open](https://hypamoon.com/connect-to/fakturownia) - [**Oblio** Unknown](https://hypamoon.com/connect-to/oblio) - [**SuperFaktura** Open](https://hypamoon.com/connect-to/superfaktura) - [**Szamlazz.hu** Unknown](https://hypamoon.com/connect-to/szamlazz-hu) - [**Billingo** Open](https://hypamoon.com/connect-to/billingo) - [**Elorus** Open](https://hypamoon.com/connect-to/elorus) - [**SmartBill** Possible](https://hypamoon.com/connect-to/smartbill) - [**iDoklad** Open](https://hypamoon.com/connect-to/idoklad) - [**Vyfakturuj** Open](https://hypamoon.com/connect-to/vyfakturuj) - [**Zuora** Open](https://hypamoon.com/connect-to/zuora) - [**Maxio (Chargify)** Open](https://hypamoon.com/connect-to/maxio) - [**Lago** Open](https://hypamoon.com/connect-to/lago) - [**Orb** Open](https://hypamoon.com/connect-to/orb) - [**Metronome** Open](https://hypamoon.com/connect-to/metronome) - [**FastSpring** Open](https://hypamoon.com/connect-to/fastspring) - [**Invoice Ninja** Open](https://hypamoon.com/connect-to/invoice-ninja) - [**Bonsai** Open](https://hypamoon.com/connect-to/bonsai) - [**Zervant** Closed](https://hypamoon.com/connect-to/zervant) - [**Payt** Open](https://hypamoon.com/connect-to/payt) - [**Upflow** Open](https://hypamoon.com/connect-to/upflow) - [**Chaser** Open](https://hypamoon.com/connect-to/chaser) - [**Onguard** Closed](https://hypamoon.com/connect-to/onguard) - [**Kolleno** Unknown](https://hypamoon.com/connect-to/kolleno) - [**Twikey** Open](https://hypamoon.com/connect-to/twikey) - [**Versapay** Open](https://hypamoon.com/connect-to/versapay) - [**Billtrust** Unknown](https://hypamoon.com/connect-to/billtrust) - [**HighRadius** Closed](https://hypamoon.com/connect-to/highradius) - [**Tesorio** Closed](https://hypamoon.com/connect-to/tesorio) - [**ING** Possible](https://hypamoon.com/connect-to/ing) - [**Rabobank** Possible](https://hypamoon.com/connect-to/rabobank) - [**ABN AMRO** Possible](https://hypamoon.com/connect-to/abn-amro) - [**bunq** Open](https://hypamoon.com/connect-to/bunq) - [**Triodos Bank** Possible](https://hypamoon.com/connect-to/triodos) - [**Knab** Possible](https://hypamoon.com/connect-to/knab) - [**KBC** Possible](https://hypamoon.com/connect-to/kbc) - [**BNP Paribas Fortis** Possible](https://hypamoon.com/connect-to/bnp-paribas-fortis) - [**Belfius** Possible](https://hypamoon.com/connect-to/belfius) - [**Deutsche Bank** Possible](https://hypamoon.com/connect-to/deutsche-bank) - [**Commerzbank** Possible](https://hypamoon.com/connect-to/commerzbank) - [**Sparkasse (FinTS)** Possible](https://hypamoon.com/connect-to/sparkasse) - [**N26 Business** Possible](https://hypamoon.com/connect-to/n26-business) - [**Kontist** Open](https://hypamoon.com/connect-to/kontist) - [**BNP Paribas** Possible](https://hypamoon.com/connect-to/bnp-paribas) - [**Credit Agricole** Closed](https://hypamoon.com/connect-to/credit-agricole) - [**Societe Generale** Possible](https://hypamoon.com/connect-to/societe-generale) - [**Shine** Possible](https://hypamoon.com/connect-to/shine) - [**Revolut Business** Possible](https://hypamoon.com/connect-to/revolut-business) - [**Wise Business** Open](https://hypamoon.com/connect-to/wise-business) - [**Checkout.com** Open](https://hypamoon.com/connect-to/checkout-com) - [**Worldline Online Payments** Open](https://hypamoon.com/connect-to/worldline-online-payments) - [**Worldpay** Possible](https://hypamoon.com/connect-to/worldpay) - [**Braintree** Open](https://hypamoon.com/connect-to/braintree) - [**CCV Online Payments** Possible](https://hypamoon.com/connect-to/ccv-online-payments) - [**Rabo Smart Pay** Open](https://hypamoon.com/connect-to/rabo-smart-pay) - [**PAYONE** Open](https://hypamoon.com/connect-to/payone) - [**Nexi Checkout** Open](https://hypamoon.com/connect-to/nexi-checkout) - [**Mangopay** Open](https://hypamoon.com/connect-to/mangopay) - [**Lemonway** Open](https://hypamoon.com/connect-to/lemonway) - [**Rapyd** Open](https://hypamoon.com/connect-to/rapyd) - [**Tpay** Open](https://hypamoon.com/connect-to/tpay) - [**PayU** Open](https://hypamoon.com/connect-to/payu) - [**Redsys** Open](https://hypamoon.com/connect-to/redsys) - [**MONEI** Open](https://hypamoon.com/connect-to/monei) - [**PAYCOMET** Open](https://hypamoon.com/connect-to/paycomet) - [**Dojo** Open](https://hypamoon.com/connect-to/dojo) - [**Cybersource** Open](https://hypamoon.com/connect-to/cybersource) - [**Airwallex** Open](https://hypamoon.com/connect-to/airwallex) - [**Satispay** Open](https://hypamoon.com/connect-to/satispay) - [**Global Payments** Possible](https://hypamoon.com/connect-to/global-payments) - [**Barclays** Possible](https://hypamoon.com/connect-to/barclays) - [**HSBC** Possible](https://hypamoon.com/connect-to/hsbc) - [**Lloyds Bank** Possible](https://hypamoon.com/connect-to/lloyds-bank) - [**NatWest** Possible](https://hypamoon.com/connect-to/natwest) - [**Starling Bank** Open](https://hypamoon.com/connect-to/starling-bank) - [**Tide** Possible](https://hypamoon.com/connect-to/tide) - [**Monzo Business** Closed](https://hypamoon.com/connect-to/monzo-business) - [**JPMorgan Chase** Possible](https://hypamoon.com/connect-to/jpmorgan-chase) - [**Bank of America** Possible](https://hypamoon.com/connect-to/bank-of-america) - [**Wells Fargo** Possible](https://hypamoon.com/connect-to/wells-fargo) - [**Mercury** Open](https://hypamoon.com/connect-to/mercury) - [**GoCardless Bank Account Data** Open](https://hypamoon.com/connect-to/gocardless-bank-account-data) - [**Tink** Possible](https://hypamoon.com/connect-to/tink) - [**Plaid** Open](https://hypamoon.com/connect-to/plaid) - [**TrueLayer** Possible](https://hypamoon.com/connect-to/truelayer) - [**Yapily** Possible](https://hypamoon.com/connect-to/yapily) - [**Salt Edge** Possible](https://hypamoon.com/connect-to/salt-edge) - [**Ponto (Isabel Group)** Possible](https://hypamoon.com/connect-to/ponto) - [**finAPI** Possible](https://hypamoon.com/connect-to/finapi) - [**Powens** Possible](https://hypamoon.com/connect-to/powens) - [**Bridge (Bridge API)** Possible](https://hypamoon.com/connect-to/bridge-api) - [**Enable Banking** Possible](https://hypamoon.com/connect-to/enable-banking) - [**MX** Possible](https://hypamoon.com/connect-to/mx) - [**Mastercard Open Finance (Finicity)** Possible](https://hypamoon.com/connect-to/mastercard-open-finance) - [**Teller** Possible](https://hypamoon.com/connect-to/teller) - [**Recommand** Open](https://hypamoon.com/connect-to/recommand) - [**Basware** Possible](https://hypamoon.com/connect-to/basware) - [**Avalara E-Invoicing** Possible](https://hypamoon.com/connect-to/avalara-e-invoicing) - [**Scrada** Possible](https://hypamoon.com/connect-to/scrada) - [**Digipoort** Possible](https://hypamoon.com/connect-to/digipoort) - [**Storecove** Unknown](https://hypamoon.com/connect-to/storecove) - [**Chorus Pro** Unknown](https://hypamoon.com/connect-to/chorus-pro) - [**Sovos** Possible](https://hypamoon.com/connect-to/sovos) - [**EDICOM** Unknown](https://hypamoon.com/connect-to/edicom) - [**ecosio** Possible](https://hypamoon.com/connect-to/ecosio) - [**Banqup** Open](https://hypamoon.com/connect-to/banqup) - [**Tradeshift** Open](https://hypamoon.com/connect-to/tradeshift) [All 1094 tools](https://hypamoon.com/connect-to) ## Tool not listed? 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 WeFact? 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=wefact) Works in Claude, ChatGPT and Copilot. [Add to Claude](https://hypamoon.com/connect?via=connect-to~wefact#claude) [Add to ChatGPT](https://hypamoon.com/connect?via=connect-to~wefact#chatgpt) [Add to Copilot](https://hypamoon.com/docs/microsoft-copilot)