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Payments and billing

Connect FastSpring to Hypamoon

Yes. FastSpring 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 FastSpring, answered from its own docs.

Public API docs
Yes. Read the docs
A key you create yourself
Yes. Create a username and password under Developer Tools, APIs, API Credentials in the FastSpring app; the password is shown once. developer.fastspring.com
Versions or a changelog
Yes. Monthly changelog entries. developer.fastspring.com
How it signs in
API username and password from the FastSpring app in HTTP Basic auth, over TLS 1.2 or later.
Webhooks
Yes. It can tell your app when something changes. developer.fastspring.com
Hosting
Cloud

Your own customer overview on FastSpring, built around how you sell your software.

  • Orders, subscriptions, accounts and products, straight from FastSpring.
  • AI that spots failed renewals and customers about to leave, with you approving every change.
  • A screen for your support team and an email when something needs a look.

Ask your chat

Answers straight from your FastSpring data, in Claude or another chat with the full Hypamoon connection.

  • Which subscriptions failed to renew this week?
  • Which orders were refunded last month, and why?

When something happens

FastSpring sends a webhook to your app, and the app asks AI what happens next.

  1. When

    FastSpring sends an event that a subscription was canceled.

    AI decides

    AI looks at the product, the history and the reason and decides whether a personal message makes sense.

    Then

    You get an email with a draft message to the customer.

A screen for your team or customers

An app on your own address, with sign-in, on top of the same FastSpring data.

  • For your team

    A support screen that shows a customer's orders, licenses and subscriptions in one place.

Add Hypamoon

Text messages, email, phone, payments and agents run in the same project as the adapter.

  • Agent on a schedule

    An agent pauses or changes a subscription when a customer asks, after you approve.

    AI proposes, you approve

FastSpring 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 FastSpring waits for your approval, one call at a time. How adapters work

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.
  • FastSpring allows 250 calls per minute per IP address. Every request needs a User-Agent 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 FastSpring. API docs: https://developer.fastspring.com/reference/getting-started-with-your-api. Read: [what]. Write: [what, or nothing].

Open in Claude

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

Sources

Checked on 7 November 2026.

FastSpring 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 FastSpring. Found something that changed? Tell us at support.

More in payments and billing

All 1094 tools

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 Open in ChatGPT

Fill in the name of your software. Checking needs no connection to Hypamoon.

Ready to connect FastSpring?

Connect your chat once, then ask it to build the adapter.

Start free

Works in Claude, ChatGPT and Copilot. Add to Claude Add to ChatGPT Add to Copilot