CallHub is a cloud-based communication platform specializing in voice and SMS outreach for large-scale campaigns.
Enhance your outreach capabilities with AI agents that can intelligently manage conversations, automate follow-ups, and drive better engagement outcomes.



CallHub excels at voice and SMS outreach campaigns at scale. Relevance AI transforms this into intelligent conversations by powering it with AI agents that can autonomously manage engagement, analyze responses, and optimize outreach strategies.
Dynamic Engagement Mastery
The agent can adapt outreach strategies in real-time based on recipient interactions.
Personalized Communication Crafting
Delivers tailored messages that resonate with individual recipient preferences and history.
Automated Outreach Optimization
Utilizes predictive analytics to determine the best times for outreach, enhancing response rates.
Relevance AI gives you access to CallHub's communication tools within your AI agent workflows.
What you’ll need
You don't need to be a developer to set up this integration. Follow this simple guide to get started:
- A CallHub account
- A Relevance AI account with access to your projects and datasets
- Authorization (you'll connect securely using API keys—no sensitive info stored manually)
Security & Reliability
The integration uses secure OAuth authentication, ensuring only authorized workflows access your CallHub data. Relevance AI handles API operations (like GET, POST, PUT, DELETE) in the background—so you don't have to worry about request formatting, authorization headers, or rate limits.
Built-in validation and error handling ensure your contact management and campaign workflows run smoothly across both platforms.
No training on your data
Your data remains private and is never utilized for model training purposes.
Security first
We never store anything we don’t need to. The inputs or outputs of your tools are never stored.

Best Practices for Non-Technical Users
To get the most out of the CallHub + Relevance AI integration without writing code:
- Configure API access properly: Ensure OAuth authentication is correctly set up with appropriate permissions.
- Structure your requests: Use consistent path formatting and proper HTTP methods for each endpoint.
- Manage response handling: Monitor response status codes and body content for successful API calls.
- Implement error handling: Set up proper error catching for failed API requests and rate limits.
- Validate data formats: Ensure request bodies match CallHub's expected JSON structure for each endpoint.