--- title: "Modern Treasury API: connect it to your AI chat ยท Hypamoon" description: "The Modern Treasury API is open, signs in with basic auth and sends webhooks. What your AI chat can build with it on Hypamoon, with sources." url: https://hypamoon.com/connect-to/modern-treasury --- 1. [Connect to](https://hypamoon.com/connect-to) 2. Modern Treasury ERP and accounting # Connect Modern Treasury to Hypamoon Yes. Modern Treasury 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 Modern Treasury, answered from its own docs. **Public API docs**\ **Yes.** [Read the docs](https://docs.moderntreasury.com/platform/reference/authentication) **A key you create yourself**\ **Yes.** Production and sandbox keys are on the API keys page in the Modern Treasury dashboard. [docs.moderntreasury.com](https://docs.moderntreasury.com/platform/reference/authentication) **Versions or a changelog**\ **Yes.** Dated platform changelog covering the app and the API. [docs.moderntreasury.com](https://docs.moderntreasury.com/changelog) **How it signs in**\ HTTP Basic auth with your Organization ID as the username and a production or sandbox API key as the password. **Webhooks**\ **Yes.** It can tell your app when something changes. [docs.moderntreasury.com](https://docs.moderntreasury.com/platform/reference/webhooks) **Hosting**\ Cloud ## Your own payments overview on Modern Treasury, built around how your money moves. - Payment orders, counterparties, expected payments and transactions, straight from Modern Treasury. - AI that matches incoming payments to what you expected, with you approving every payment order. - A screen for your finance team and a short email every morning. ### Ask your chat Answers straight from your Modern Treasury data, in Claude or another chat with the full Hypamoon connection. - Which expected payments have not arrived yet this week? - Which payment orders are waiting for approval? ### When something happens Modern Treasury sends a webhook to your app, and the app asks AI what happens next. 1. When Modern Treasury reports a new incoming payment. AI decides AI compares the amount, the sender and the reference with open expected payments and proposes a match. Then Your finance team gets an email with the matches to confirm. ### A screen for your team or customers An app on your own address, with sign-in, on top of the same Modern Treasury data. - For your team An approval screen for your finance team with the payment orders that wait for a second pair of eyes. ### Add Hypamoon Text messages, email, phone, payments and agents run in the same project as the adapter. - Agent on a schedule An agent prepares a payment order from an approved invoice, and it only goes out after you approve. AI proposes, you approve Modern Treasury 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 Modern Treasury 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. - Webhook endpoints are set for the whole organization, with separate URLs for live and test traffic. ## 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 Modern Treasury. API docs: https://docs.moderntreasury.com/platform/reference/authentication. Read: \[what\]. Write: \[what, or nothing\]. [Open in Claude](https://claude.ai/new?q=Build%20the%20Hypamoon%20recipe%20build-an-adapter%20for%20Modern%20Treasury.%20API%20docs%3A%20https%3A%2F%2Fdocs.moderntreasury.com%2Fplatform%2Freference%2Fauthentication.%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. - [docs.moderntreasury.com/platform/reference/authentication](https://docs.moderntreasury.com/platform/reference/authentication) - [docs.moderntreasury.com/changelog](https://docs.moderntreasury.com/changelog) - [docs.moderntreasury.com/platform/reference/webhooks](https://docs.moderntreasury.com/platform/reference/webhooks) Modern Treasury 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 Modern Treasury. 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 Modern Treasury? 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=modern-treasury) Works in Claude, ChatGPT and Copilot. [Add to Claude](https://hypamoon.com/connect?via=connect-to~modern-treasury#claude) [Add to ChatGPT](https://hypamoon.com/connect?via=connect-to~modern-treasury#chatgpt) [Add to Copilot](https://hypamoon.com/docs/microsoft-copilot)