--- title: "Connect Constant Contact to Hypamoon" description: "Constant Contact has an open API. See what you can build with it in Hypamoon, how it signs in, and the sources we checked." url: https://hypamoon.com/connect-to/constant-contact --- 1. [Connect to](https://hypamoon.com/connect-to) 2. Constant Contact Email marketing # Connect Constant Contact to Hypamoon Yes, with one catch. Constant Contact has an open API that you can use yourself, but it signs in with OAuth only, and that takes more work in a Hypamoon adapter today. Open ## The check Three questions about the API of Constant Contact, answered from its own docs. **Public API docs**\ **Yes.** [Read the docs](https://developer.constantcontact.com/api_guide/auth_overview.html) **A key you create yourself**\ **Yes.** Register your own application in the V3 developer portal. New applications are private, so only the user who created it can connect it, which is enough for your own account. [developer.constantcontact.com](https://developer.constantcontact.com/api_guide/auth_overview.html) **Versions or a changelog**\ **Yes.** V3 API with monthly release notes. [developer.constantcontact.com](https://developer.constantcontact.com/api_guide/what-s-new/release-notes) **How it signs in**\ OAuth 2.0 only; access tokens last 24 hours and refresh tokens expire after 180 days without use. **Webhooks**\ **No.** [developer.constantcontact.com](https://developer.constantcontact.com/api_guide/partner_webhook_overview.html) **Hosting**\ Cloud **Condition**\ Letting other Constant Contact accounts connect your application needs approval through support. ## What you can build Add sign-ups to a contact list from a site or chat, and look up campaign results. Your chat writes it as a Hypamoon adapter from the docs above. Reading starts after you click Allow in the portal, and every write waits for your approval, one call at a time. [How adapters work](https://hypamoon.com/docs/adapters) ### Good to know - Constant Contact signs in with OAuth or signed requests only, with tokens that expire. The Hypamoon vault holds a fixed key today, so an adapter for Constant Contact takes more work: ask your chat to check this first. - Webhooks only cover billing and account events for technology partners, not contacts or campaigns. ## 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 Constant Contact. API docs: https://developer.constantcontact.com/api\_guide/index.html. Read: \[what\]. Write: \[what, or nothing\]. [Open in Claude](https://claude.ai/new?q=Build%20the%20Hypamoon%20recipe%20build-an-adapter%20for%20Constant%20Contact.%20API%20docs%3A%20https%3A%2F%2Fdeveloper.constantcontact.com%2Fapi_guide%2Findex.html.%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 1 November 2026. - [developer.constantcontact.com/api\_guide/auth\_overview.html](https://developer.constantcontact.com/api_guide/auth_overview.html) - [developer.constantcontact.com/api\_guide/what-s-new/release-notes](https://developer.constantcontact.com/api_guide/what-s-new/release-notes) - [developer.constantcontact.com/api\_guide/partner\_webhook\_overview.html](https://developer.constantcontact.com/api_guide/partner_webhook_overview.html) Constant Contact 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 Constant Contact. Found something that changed? Tell us at [support](https://hypamoon.com/support#contact). ## More in email marketing - [**ActiveCampaign** Open](https://hypamoon.com/connect-to/activecampaign) - [**Brevo** Open](https://hypamoon.com/connect-to/brevo) - [**Campaign Monitor** Open](https://hypamoon.com/connect-to/campaign-monitor) - [**Customer.io** Open](https://hypamoon.com/connect-to/customer-io) - [**Klaviyo** Open](https://hypamoon.com/connect-to/klaviyo) - [**Laposta** Open](https://hypamoon.com/connect-to/laposta) - [**Mailchimp** Open](https://hypamoon.com/connect-to/mailchimp) - [**MailerLite** Open](https://hypamoon.com/connect-to/mailerlite) - [**Marketo Engage** Open](https://hypamoon.com/connect-to/marketo-engage) - [**Omnisend** Open](https://hypamoon.com/connect-to/omnisend) - [**Salesforce Account Engagement (Pardot)** Open](https://hypamoon.com/connect-to/salesforce-account-engagement) [All 267 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 Constant Contact? 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=constant-contact) Works in Claude and ChatGPT. [Add to Claude](https://hypamoon.com/connect?via=connect-to~constant-contact#claude) [Add to ChatGPT](https://hypamoon.com/connect?via=connect-to~constant-contact#chatgpt)