--- title: "JustCall API: connect it to your AI chat ยท Hypamoon" description: "The JustCall API is open, signs in with an API key and sends webhooks. What your AI chat can build with it on Hypamoon, with sources." url: https://hypamoon.com/connect-to/justcall --- 1. [Connect to](https://hypamoon.com/connect-to) 2. JustCall Phone and messaging # Connect JustCall to Hypamoon Yes. JustCall 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 JustCall, answered from its own docs. **Public API docs**\ **Yes.** [Read the docs](https://developer.justcall.io/docs/authentication) **A key you create yourself**\ **Yes.** Copy your API key and secret yourself under your profile, APIs and Webhooks; you can reset the pair there. [developer.justcall.io](https://developer.justcall.io/docs/authentication) **Versions or a changelog**\ **Yes.** Versioned paths (api.justcall.io/v2.1/), a version history from v2 onwards, and monthly API release logs. [developer.justcall.io](https://developer.justcall.io/docs) **How it signs in**\ API key and secret together in the Authorization header as api\_key:api\_secret. **Webhooks**\ **Yes.** It can tell your app when something changes. [developer.justcall.io](https://developer.justcall.io/docs/authentication) **Hosting**\ Cloud **Condition**\ API access starts at the JustCall Team plan. ## What you can build Log every call and text with its recording in your CRM, and send a follow-up text after a missed call. 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 - 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. ## 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 JustCall. API docs: https://developer.justcall.io/docs/authentication. Read: \[what\]. Write: \[what, or nothing\]. [Open in Claude](https://claude.ai/new?q=Build%20the%20Hypamoon%20recipe%20build-an-adapter%20for%20JustCall.%20API%20docs%3A%20https%3A%2F%2Fdeveloper.justcall.io%2Fdocs%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. - [developer.justcall.io/docs/authentication](https://developer.justcall.io/docs/authentication) - [developer.justcall.io/docs](https://developer.justcall.io/docs) JustCall 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 JustCall. Found something that changed? Tell us at [support](https://hypamoon.com/support#contact). ## More in phone and messaging - [**Aircall** Open](https://hypamoon.com/connect-to/aircall) - [**Bird (MessageBird)** Open](https://hypamoon.com/connect-to/bird) - [**Dialpad** Open](https://hypamoon.com/connect-to/dialpad) - [**RingCentral** Open](https://hypamoon.com/connect-to/ringcentral) - [**Twilio** Open](https://hypamoon.com/connect-to/twilio) - [**Vonage** Open](https://hypamoon.com/connect-to/vonage) - [**WhatsApp Business Platform** Open](https://hypamoon.com/connect-to/whatsapp-business-platform) - [**Voys** Open](https://hypamoon.com/connect-to/voys) - [**Spryng** Open](https://hypamoon.com/connect-to/spryng) - [**CM.com** Open](https://hypamoon.com/connect-to/cm-com) - [**Infobip** Open](https://hypamoon.com/connect-to/infobip) - [**CloudTalk** Open](https://hypamoon.com/connect-to/cloudtalk) - [**Ringover** Open](https://hypamoon.com/connect-to/ringover) - [**Placetel** Unknown](https://hypamoon.com/connect-to/placetel) - [**sipgate** Unknown](https://hypamoon.com/connect-to/sipgate) - [**Hallo** Closed](https://hypamoon.com/connect-to/hallo) - [**3CX** Possible](https://hypamoon.com/connect-to/3cx) - [**Talkdesk** Possible](https://hypamoon.com/connect-to/talkdesk) - [**360dialog** Unknown](https://hypamoon.com/connect-to/360dialog) - [**Wati** Open](https://hypamoon.com/connect-to/wati) [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 JustCall? 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=justcall) Works in Claude, ChatGPT and Copilot. [Add to Claude](https://hypamoon.com/connect?via=connect-to~justcall#claude) [Add to ChatGPT](https://hypamoon.com/connect?via=connect-to~justcall#chatgpt) [Add to Copilot](https://hypamoon.com/docs/microsoft-copilot)