--- title: "Pay. API: connect it to your AI chat ยท Hypamoon" description: "The Pay. API is open, signs in with basic auth and sends webhooks. What your AI chat can build with it on Hypamoon, how it connects, and the sources we checked." url: https://hypamoon.com/connect-to/pay-nl --- 1. [Connect to](https://hypamoon.com/connect-to) 2. Pay. Payments and billing # Connect Pay. to Hypamoon Yes. Pay. 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 Pay., answered from its own docs. **Public API docs**\ **Yes.** Public developer documentation and API reference. [Read the docs](https://developer.pay.nl/v2.0/docs/how-to) **A key you create yourself**\ **Yes.** Copy the API token from the tokens page in your own Pay. account. [developer.pay.nl](https://developer.pay.nl/v2.0/docs/how-to) **Versions or a changelog**\ **Yes.** Versioned docs (v2.0) and dated release notes. [developer.pay.nl](https://developer.pay.nl/v2.0/changelog/tgu-release-notes-06-10-2026) **How it signs in**\ Basic authentication with the AT code of your token as user name and the token as password; some calls take a sales location code (SL code) and its secret. **Webhooks**\ **Yes.** It can tell your app when something changes. [developer.pay.nl](https://developer.pay.nl/v2.0/docs/signing) **Hosting**\ Cloud ## Your own payment follow-up on Pay., for your team and your customers. - Transactions, refunds and sales locations, straight from Pay. - AI that spots failed or expired payments and decides who needs a reminder. - A screen for your team and an email to the customer when a payment does not go through. ### Ask your chat Answers straight from your Pay. data, in Claude or another chat with the full Hypamoon connection. - Which payments failed or expired yesterday, and for which orders? - How much did we refund this month? ### When something happens Pay. sends a webhook to your app, and the app asks AI what happens next. 1. When Pay. sends an exchange call because a transaction changed status. AI decides AI looks at the order and the customer's history and decides whether to wait, remind or alert you. Then The customer gets an email from your app, or you get a short note. ### A screen for your team or customers An app on your own address, with sign-in, on top of the same Pay. data. - For your team A screen for your team with today's payments, failures and refunds per sales location. ### Add Hypamoon Text messages, email, phone, payments and agents run in the same project as the adapter. - Text message, Netherlands for now A payment expires, and the customer gets a text message with a link to try again. Pay. 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 Pay. 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. - Status updates arrive as exchange calls to your URL; you can switch on signed exchanges per sales location. A serviceId (sales location) is needed for most calls. ## 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 Pay.. API docs: https://developer.pay.nl/v2.0/docs/how-to. Read: \[what\]. Write: \[what, or nothing\]. [Open in Claude](https://claude.ai/new?q=Build%20the%20Hypamoon%20recipe%20build-an-adapter%20for%20Pay..%20API%20docs%3A%20https%3A%2F%2Fdeveloper.pay.nl%2Fv2.0%2Fdocs%2Fhow-to.%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.pay.nl/v2.0/docs/how-to](https://developer.pay.nl/v2.0/docs/how-to) - [developer.pay.nl/v2.0/changelog/tgu-release-notes-06-10-2026](https://developer.pay.nl/v2.0/changelog/tgu-release-notes-06-10-2026) - [developer.pay.nl/v2.0/docs/signing](https://developer.pay.nl/v2.0/docs/signing) Pay. 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 Pay.. 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) - [**WeFact** Open](https://hypamoon.com/connect-to/wefact) - [**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) - 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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 Pay.? 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=pay-nl) Works in Claude, ChatGPT and Copilot. [Add to Claude](https://hypamoon.com/connect?via=connect-to~pay-nl#claude) [Add to ChatGPT](https://hypamoon.com/connect?via=connect-to~pay-nl#chatgpt) [Add to Copilot](https://hypamoon.com/docs/microsoft-copilot)