# How to connect Callback24 to Claude ```json { "title": "How to connect Callback24 to Claude", "toolkit": "Callback24", "toolkit_slug": "callback24", "framework": "Claude Cowork", "framework_slug": "claude-cowork", "url": "https://composio.dev/toolkits/callback24/framework/claude-cowork", "markdown_url": "https://composio.dev/toolkits/callback24/framework/claude-cowork.md", "updated_at": "2026-10-03T05:31:12.577Z" } ``` ## Introduction Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf. This guide walks you through the easiest and most secure way to connect your Callback24 account to Claude via Composio Connect, enabling it to place an outbound call to +15551234 now, create voicemail transcription for latest call, list active routing groups and members, and more such actions on your behalf without compromising your account security. Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three. ## Also integrate Callback24 with - [ChatGPT](https://composio.dev/toolkits/callback24/framework/chatgpt) - [Hermes](https://composio.dev/toolkits/callback24/framework/hermes-agent) - [Atomic Agent](https://composio.dev/toolkits/callback24/framework/atomic-agent) ## Connect Callback24 to Claude Cowork ### Connecting Callback24 to Claude Web, Desktop, and Cowork Two ways to add the Composio connector. Pick whichever you prefer. ### 1. Add with one click Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2. [Add to Claude](https://claude.ai/customize/connectors?modal=add-custom-connector&connectorName=Composio&connectorUrl=https%3A%2F%2Fconnect.composio.dev%2Fmcp) ### Add manually In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top. Click Add custom connector and paste in the Composio MCP server URL: ```bash https://connect.composio.dev/mcp ``` ## What is the Callback24 MCP server, and what's possible with it? The Callback24 MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Callback24 account. It provides structured and secure access so your agent can perform Callback24 operations on your behalf. ## Supported Tools | Tool slug | Name | Description | |---|---|---| | `CALLBACK24_ASSIGN_USER_TO_SERVICE` | Assign User to Service | Assign a Callback24 user to a service, optionally within a routing group. | | `CALLBACK24_BATCH_ASSIGN_USERS_TO_SERVICE` | Batch Assign Users to Service | Sequentially assign 1-25 Callback24 users to one service. This operation is non-atomic and has no rollback: processing stops after the first provider failure, malformed success response, or transport error. The attempted user can be marked unknown when the assignment may have occurred; verify membership before retrying. All remaining users are marked not_attempted. | | `CALLBACK24_BATCH_REMOVE_USERS_FROM_SERVICE` | Batch Remove Users from Service | Sequentially remove 1-25 users from a Callback24 service. This operation is non-atomic and provides no rollback: processing stops after the first provider failure, malformed success response, or transport error. The attempted user can be marked unknown when removal may have occurred; verify membership before retrying. Remaining users are marked not_attempted. | | `CALLBACK24_CANCEL_UPCOMING_PHONE_CALLS` | Cancel Upcoming Phone Calls | Irreversibly bulk-cancel every upcoming phone call matching a phone number or lead reference. Optionally narrow the destructive operation by earliest scheduled time and service. The reason is permanently appended to each cancelled call's comments and defaults to 'Canceled by API, no reason'. | | `CALLBACK24_CREATE_GROUP` | Create Group | Create a routing group within a Callback24 service, with optional localized names. | | `CALLBACK24_CREATE_PHONE_CALL` | Create Phone Call | Create or schedule a real phone call in Callback24. This action can trigger customer-visible telephony to the supplied recipient phone number. | | `CALLBACK24_CREATE_SERVICE` | Create Service | Create a Callback24 service for a website. This can create customer-visible widget or routing configuration. | | `CALLBACK24_CREATE_USER` | Create User | Create a company user in Callback24. This may send an invitation and may consume an account seat. | | `CALLBACK24_DELETE_GROUP` | Delete Group | Permanently and irreversibly delete one Callback24 routing group by group ID. This deletion cannot be undone. | | `CALLBACK24_DELETE_SERVICE` | Delete Service | Permanently and irreversibly delete one Callback24 service and its associated routing and customer-facing widget configuration. This operation cannot be undone. | | `CALLBACK24_DELETE_USER` | Delete User | Permanently and irreversibly delete one company user by Callback24 user ID. This operation cannot be undone. | | `CALLBACK24_GET_CURRENT_USER` | Get Current User | Return the Callback24 user identity associated with the connected API token. | | `CALLBACK24_GET_GROUP` | Get Group | Return one Callback24 routing group by ID with its service ID and localized names. | | `CALLBACK24_GET_PHONE_CALL` | Get Phone Call | Return detailed metadata, tags, and assigned-user information for one Callback24 phone call. | | `CALLBACK24_GET_PHONE_CALL_RECORDING` | Get Phone Call Recording | Return the recording URL for one recorded phone call. | | `CALLBACK24_GET_SERVICE` | Get Service | Return one Callback24 service with opening hours, routing groups, and assigned users. | | `CALLBACK24_GET_USER` | Get User | Return one company user by Callback24 user ID. | | `CALLBACK24_LIST_GROUPS` | List Groups | Return all Callback24 routing groups with their service IDs and localized names. | | `CALLBACK24_LIST_PHONE_CALLS` | List Phone Calls | Return one page of phone-call history, optionally filtered by type, date range, phone number, users, or services. Use limit with either page or offset to paginate; Callback24 does not document precedence, so do not combine page with a nonzero offset. | | `CALLBACK24_LIST_SERVICES` | List Services | Return all Callback24 services with their nested groups, assigned users, and opening hours. | | `CALLBACK24_LIST_USERS` | List Users | Return all company users visible to the connected Callback24 account. | | `CALLBACK24_REMOVE_USER_FROM_SERVICE` | Remove User from Service | Remove a Callback24 user's assignment from a service, optionally within a routing group. | | `CALLBACK24_UPDATE_GROUP` | Update Group | Update one or more localized names for a Callback24 routing group. | | `CALLBACK24_UPDATE_PHONE_CALL` | Update Phone Call | Update editable metadata for an existing phone call without changing its explicit cancellation or start/end status fields. Provide at least one editable field in addition to call_id. | | `CALLBACK24_UPDATE_PHONE_CALL_STATUS` | Update Phone Call Status | Set a phone call's cancelled flag and/or recorded start and end times; this changes operational call state. Provide at least one of cancelled, call_start_time, or call_end_time. | | `CALLBACK24_UPDATE_SERVICE` | Update Service | Change the website configured for an existing Callback24 service. | | `CALLBACK24_UPDATE_USER` | Update User | Update one or more profile or role fields for an existing Callback24 company user. Provide at least one of first_name, last_name, email, phone_number, or role. | ## Supported Triggers None listed. ## Troubleshooting ### 1. Why does Claude not use the Composio connector for Callback24? The connector can show as connected, but Claude must use it in each Callback24 conversation. - Click + at the lower left of the chat, or type /. - Hover Connectors. - Turn on Composio. - Ask Claude to connect to Callback24 again. ### 2. Why does Claude show an MCP server error before Callback24 connects? Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Callback24. - Check that the connector URL is https://connect.composio.dev/mcp. - Connectors run from Anthropic's cloud, so your device network is usually not the problem. - Add the connector again from Customize > Connectors, then ask Claude to connect Callback24. - If it fails again, send the error and the ofid_ reference id to support@composio.dev. ### 3. Why does the Callback24 authorization link not work? The Composio connector is one server. Your Callback24 account connects separately when Claude asks for it. - If the browser does not open, or the link expires, ask Claude to retry the Callback24 connection. - Composio creates a fresh Callback24 authorization link. - Open that link in your browser and finish the Callback24 sign-in. ### 4. Why do Callback24 actions fail after they worked before? The Callback24 connection can expire or lose permission. - Ask Claude to inspect the Callback24 connection. - If the connection is unhealthy, disconnect it when Claude prompts you. - Reconnect the Callback24 account and retry the action. - If Claude shows a permission prompt, approve it before Claude changes data in Callback24. - If the action still fails with a permission error, check that the connected account has that permission in Callback24 itself. ### 5. How do I switch to a different Callback24 account? Claude can manage the Callback24 connection for you. - Ask Claude to disconnect or delete the current Callback24 account. - Ask Claude to connect Callback24 again. - Open the new Composio authorization link for Callback24. - Sign in with the other Callback24 account in the browser. - After the account connects, ask Claude to retry the Callback24 task. ### 6. Why is my Callback24 connection missing in Claude Desktop or on a Team plan? The connector belongs to your Claude account, so your Callback24 connection works in Claude Web, Desktop, and Cowork. - In Claude Desktop, open Customize > Connectors. - Next to Composio, click ⋮ and click Clear cache. - If Callback24 tools still do not appear, click ⋮, disconnect, remove the connector, and add it again. - On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Callback24. ## Creating MCP Server - Stand-alone vs Composio SDK The Callback24 MCP server connects Claude Web, Desktop, and Cowork to your Callback24 account through Composio. Once connected, Claude can use the available Callback24 tools and triggers to complete tasks on your behalf. ## Complete Code None listed. ## How to build Callback24 MCP Agent with another framework - [ChatGPT](https://composio.dev/toolkits/callback24/framework/chatgpt) - [Hermes](https://composio.dev/toolkits/callback24/framework/hermes-agent) - [Atomic Agent](https://composio.dev/toolkits/callback24/framework/atomic-agent) ## Related Toolkits - [Gmail](https://composio.dev/toolkits/gmail) - Gmail is Google's email service with powerful spam protection, search, and G Suite integration. It keeps your inbox organized and makes communication fast and reliable. - [Outlook](https://composio.dev/toolkits/outlook) - Outlook is Microsoft's email and calendaring platform for unified communications and scheduling. It helps users stay organized with powerful email, contacts, and calendar management. - [Slack](https://composio.dev/toolkits/slack) - Slack is a channel-based messaging platform for teams and organizations. It helps people collaborate in real time, share files, and connect all their tools in one place. - [Gong](https://composio.dev/toolkits/gong) - Gong is a platform for video meetings, call recording, and team collaboration. It helps teams capture conversations, analyze calls, and turn insights into action. - [Microsoft teams](https://composio.dev/toolkits/microsoft_teams) - Microsoft Teams is a collaboration platform that combines chat, meetings, and file sharing within Microsoft 365. It keeps distributed teams connected and productive through seamless virtual communication. - [Slackbot](https://composio.dev/toolkits/slackbot) - Slackbot is a conversational automation tool for Slack that handles reminders, notifications, and automated responses. It boosts team productivity by streamlining onboarding, answering FAQs, and managing timely alerts—all right inside Slack. - [2chat](https://composio.dev/toolkits/_2chat) - 2chat is an API platform for WhatsApp and multichannel text messaging. It streamlines chat automation, group management, and real-time messaging for developers. - [Agent mail](https://composio.dev/toolkits/agent_mail) - Agent mail provides AI agents with dedicated email inboxes for sending, receiving, and managing emails. It empowers agents to communicate autonomously with people, services, and other agents—no human intervention needed. - [Android Texter](https://composio.dev/toolkits/android_texter) - Android Texter is an API service that connects Android phones to SMS, MMS, contacts, and device data. Use it to automate mobile messaging without building your own phone-to-API bridge. - [Basecamp](https://composio.dev/toolkits/basecamp) - Basecamp is a project management and team collaboration tool by 37signals. It helps teams organize tasks, share files, and communicate efficiently in one place. - [Blooio](https://composio.dev/toolkits/blooio) - Blooio is a stable v2 API platform for messaging, chats, contacts, groups, phone numbers, and account analytics. It gives teams a clean way to build reliable communication workflows without stitching together fragile custom APIs. - [CallOnTheGo](https://composio.dev/toolkits/callonthego) - CallOnTheGo is a telephony API for managing phone numbers, caller IDs, suppression lists, audio assets, contact lists, and Voice AI campaigns. It provides programmatic control over calling infrastructure and campaign automation for scalable voice outreach. - [Carbon Voice MCP](https://composio.dev/toolkits/carbon_voice_mcp) - Carbon Voice MCP is a voice-first collaboration platform for messages, conversations, and workflows. Use it to centralize voice communications and streamline team collaboration. - [CardClan](https://composio.dev/toolkits/cardclan) - CardClan is a digital card platform for creating and sending personalized team cards. Use it to celebrate moments, share card links, and manage card workflows without extra coordination. - [Chatwork](https://composio.dev/toolkits/chatwork) - Chatwork is a team communication platform with group chats, file sharing, and task management. It helps businesses boost collaboration and streamline productivity. - [Clickmeeting](https://composio.dev/toolkits/clickmeeting) - ClickMeeting is a cloud-based platform for running online meetings and webinars. It helps businesses and individuals host, manage, and engage virtual audiences with ease. - [Confluence](https://composio.dev/toolkits/confluence) - Confluence is Atlassian's team collaboration and knowledge management platform. It helps your team organize, share, and update documents and project content in one secure workspace. - [Daily](https://composio.dev/toolkits/daily) - Daily is a WebRTC video and audio API platform for building rooms, meetings, recordings, live streams, transcriptions, and telephony. It gives developers reliable real-time media infrastructure without managing complex conferencing stacks. - [Dailybot](https://composio.dev/toolkits/dailybot) - DailyBot streamlines team collaboration with chat-based standups, reminders, and polls. It keeps work flowing smoothly in your favorite messaging platforms. - [Dialmycalls](https://composio.dev/toolkits/dialmycalls) - Dialmycalls is a mass notification service for sending voice and text messages to contacts. It helps teams and organizations quickly broadcast urgent alerts and updates. ## Frequently Asked Questions ### What are the differences in Tool Router MCP and Callback24 MCP? With a standalone Callback24 MCP server, the agents and LLMs can only access a fixed set of Callback24 tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Callback24 and many other apps based on the task at hand, all through a single MCP endpoint. ### Can I use Tool Router MCP with Claude Cowork? Yes, you can. Claude Cowork fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Callback24 tools. ### Can I manage the permissions and scopes for Callback24 while using Tool Router? Yes, absolutely. You can configure which Callback24 scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do. ### How safe is my data with Composio Tool Router? All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Callback24 data and credentials are handled as safely as possible. --- [See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)