No, Warmbox is a paid service, but you can check their website for current trial offers.

Sales Engagement

Warmbox

Email warmup tool to ensure cold emails never land in spam.

Important Links

Documentation ↗Website ↗Pricing ↗

Key Features

Automated Email Warmup

Deliverability Monitoring

Inbox Placement Optimization

Email Verification

Intent Intelligence

How to use this tool

"Claude, check the warmup status of my 'sales-outbound' inbox in Warmbox and report its deliverability score."

Technical Feature Analysis

Warmbox is built for AI-first teams, specifically for workflows where you want an AI agent to handle your Sales Engagement tasks. Instead of manual data entry, Warmbox lets your AI "see" and "act" on your data directly through its REST.

Warmbox provides an API for programmatically managing email warmup schedules and monitoring deliverability metrics. It automates the process of sending and replying to emails between your inbox and a network of thousands of other accounts to build sender reputation. By integrating the Warmbox API, sales teams can ensure their cold outreach infrastructure is always optimized for high inbox placement.

The biggest win with Warmbox is the ability to move from **Chat-to-Action**. By connecting it to your AI agent, you can automate Automated Email Warmup, Deliverability Monitoring, Inbox Placement Optimization without having to build a custom tech stack or hire a developer.

Direct Agent Workflow for Warmbox

• Connect: Give your Warmbox API Key to Claude Code, Cowork, or your favorite AI agent.

• Automate: Your agent handles Automated Email Warmup and Deliverability Monitoring directly.

• Execute: No extra software or middleware required for Sales Engagement automation.

Use Warmbox for

AI Tools for Cold Outreach Sales Workflow Automation Tools

Technical Details

API Type

REST

Authentication

API Key

Pricing Tier

Paid Only

SDK Languages

N/A

Webhooks

Yes

Frequently Asked Questions

What does Warmbox do?

Warmbox is a sales engagement tool that provides Email warmup tool to ensure cold emails never land in spam.

How do I use Warmbox with AI agents?

Connect Warmbox to agents like Claude Code or Cowork by using its REST and your API Key keys. This allows your agent to perform Automated Email Warmup and Deliverability Monitoring directly without needing extra software.