--- title: "Dropbox Sign API: connect it to your AI chat ยท Hypamoon" description: "The Dropbox Sign 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/dropbox-sign --- 1. [Connect to](https://hypamoon.com/connect-to) 2. Dropbox Sign Files and e-signing # Connect Dropbox Sign to Hypamoon Yes. Dropbox Sign 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 Dropbox Sign, answered from its own docs. **Public API docs**\ **Yes.** Public API reference, formerly HelloSign. [Read the docs](https://developers.hellosign.com/) **A key you create yourself**\ **Yes.** Create the API key yourself on the API settings page of your Dropbox Sign account. [developers.hellosign.com](https://developers.hellosign.com/docs/guides/api-dashboard) **Versions or a changelog**\ **Yes.** Versioned path /v3. [developers.hellosign.com](https://developers.hellosign.com/docs/guides/api-dashboard) **How it signs in**\ API key as the HTTP Basic username, or OAuth 2.0 for apps that act for other accounts. **Webhooks**\ **Yes.** It can tell your app when something changes. [developers.hellosign.com](https://developers.hellosign.com/docs/guides/api-dashboard) **Hosting**\ Cloud **Condition**\ Legally binding requests need a paid API plan; on a free account you can only send test requests. ## Your own contract flow on Dropbox Sign, from intake to a signed file in the right place. - Documents, templates, signers and their status, straight from Dropbox Sign. - AI that fills the document from the intake and checks who still has to sign. - An intake page on your own site, and a short email when everything is signed. ### Ask your chat Answers straight from your Dropbox Sign data, in Claude or another chat with the full Hypamoon connection. - Which documents sent last week are still waiting for a signature? - Who signed the rental agreement, and when? ### When something happens Dropbox Sign sends a webhook to your app, and the app asks AI what happens next. 1. When A document is fully signed. AI decides AI reads the document and picks the customer and the folder it belongs to. Then The signed file is stored with the customer in your app, and the account manager gets an email. ### A screen for your team or customers An app on your own address, with sign-in, on top of the same Dropbox Sign data. - For your customers Customers sign in and find all their signed documents in one place. Dropbox Sign 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 Dropbox Sign 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. - Test mode requests are watermarked and limited to 10 per minute. Events come as account and app callbacks to your URL. ## 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 Dropbox Sign. API docs: https://developers.hellosign.com/. Read: \[what\]. Write: \[what, or nothing\]. [Open in Claude](https://claude.ai/new?q=Build%20the%20Hypamoon%20recipe%20build-an-adapter%20for%20Dropbox%20Sign.%20API%20docs%3A%20https%3A%2F%2Fdevelopers.hellosign.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. - [developers.hellosign.com/](https://developers.hellosign.com/) - [developers.hellosign.com/docs/guides/api-dashboard](https://developers.hellosign.com/docs/guides/api-dashboard) Dropbox Sign 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 Dropbox Sign. Found something that changed? Tell us at [support](https://hypamoon.com/support#contact). ## More in files and e-signing - [**Adobe Acrobat Sign** Open](https://hypamoon.com/connect-to/adobe-acrobat-sign) - [**Box** Open](https://hypamoon.com/connect-to/box) - [**DocuSign** Possible](https://hypamoon.com/connect-to/docusign) - [**Dropbox** Open](https://hypamoon.com/connect-to/dropbox) - [**PandaDoc** Possible](https://hypamoon.com/connect-to/pandadoc) - [**SharePoint and OneDrive** Open](https://hypamoon.com/connect-to/sharepoint-onedrive) - [**Yousign (Youtrust)** Possible](https://hypamoon.com/connect-to/yousign) - [**DocuWare** Open](https://hypamoon.com/connect-to/docuware) - [**Google Drive** Open](https://hypamoon.com/connect-to/google-drive) - [**BoldSign** Open](https://hypamoon.com/connect-to/boldsign) - [**SignWell** Open](https://hypamoon.com/connect-to/signwell) - [**Oneflow** Open](https://hypamoon.com/connect-to/oneflow) - [**Documenso** Open](https://hypamoon.com/connect-to/documenso) - [**signNow** Open](https://hypamoon.com/connect-to/signnow) - [**Zoho Sign** Open](https://hypamoon.com/connect-to/zoho-sign) - [**Nextcloud** Open](https://hypamoon.com/connect-to/nextcloud) - [**pCloud** Possible](https://hypamoon.com/connect-to/pcloud) - [**Scrive** Open](https://hypamoon.com/connect-to/scrive) - [**Signhost** Open](https://hypamoon.com/connect-to/signhost) - [**Penneo** Open](https://hypamoon.com/connect-to/penneo) - [**Skribble** Open](https://hypamoon.com/connect-to/skribble) - [**M-Files** Open](https://hypamoon.com/connect-to/m-files) - [**Autodesk Platform Services** Open](https://hypamoon.com/connect-to/autodesk-platform-services) [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 Dropbox Sign? 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=dropbox-sign) Works in Claude, ChatGPT and Copilot. [Add to Claude](https://hypamoon.com/connect?via=connect-to~dropbox-sign#claude) [Add to ChatGPT](https://hypamoon.com/connect?via=connect-to~dropbox-sign#chatgpt) [Add to Copilot](https://hypamoon.com/docs/microsoft-copilot)