I really like how easy it is to drop CarlyEmail into my agent workflows. The free tier is super generous for testing, and the API responds quickly. Getting a real inbox without a dashboard feels lightweight and efficient. It handles attachments well too. Definitely recommend for anyone building email-driven agents who wants a simple, reliable backend.
Haven't used CarlyEmail yet?
Ask Trustburn
Questions about CarlyEmail
What is CarlyEmail?
CarlyEmail provides an email-integration service designed for AI agents, offering real inboxes on its own or a custom domain along with SDK, MCP, CLI, and REST tools for sending and receiving email. The platform delivers signed webhook or WebSocket events that wake an agent runtime when new mail arrives and preserves thread continuity so that replies continue the correct conversation. It is compatible with several agent frameworks, including LangChain, OpenAI Agents SDK, Claude Agent SDK, Vercel AI SDK, Mastra, and Cloudflare Agents, and provides TypeScript and Python libraries.
What are the pricing tiers and limits?
The free tier includes three inboxes and a monthly limit of one thousand emails with no card required. Paid plans start at $20 per month for 25 inboxes and 10,000 emails per month, while the Enterprise plan costs $200 per month with 250 inboxes and 100,000 emails per month. All plans offer unlimited webhooks, pods, and people, with storage scaling from 1 GB to 250 GB.
What technologies and integrations are available?
The platform offers multiple integration methods including TypeScript, Python, CLI, cURL, and REST APIs. Developers can install the library via npm or pip to interact with the API directly. The service supports various agent frameworks such as LangGraph, OpenAI Agents API, and Vercel eve.
How does the system handle email threads and continuity?
The service ensures thread continuity by using a thread_id to resume the right agent conversation when replies land. This prevents conversations from being fragmented and ensures the agent context remains accurate. Webhooks are pushed the second mail arrives to trigger the runtime.
What are the attachment capabilities?
The platform supports attachments both in and out, with a maximum size of up to 25 MB. This allows for the exchange of larger files between the agent and the user or other systems. The service also provides live email tools for any compatible agent through the MCP.
How can users interact with the service via the command line?
The service includes a CLI tool that allows users to sign up, manage inboxes, and send messages from the command line. Commands like npx carlyemail signup and npx carlyemail messages are used for these tasks. The API can also be accessed directly using curl with the appropriate API key.
What are the details of the free tier?
The service provides a free tier that includes three inboxes and a monthly limit of one thousand emails. This allows new users to test the service without any financial commitment. Paid plans offer higher limits and additional features like custom domains and increased storage.
How does the inbox creation and management process work?
The service allows users to create inboxes with a specific username, such as hello, resulting in an address like [email protected]. The process involves creating the inbox, listing messages, and replying within the thread. The API key is required for programmatic access to these features.
What programming languages and frameworks are supported?
The service supports multiple programming languages and frameworks, including TypeScript and Python, to cater to different development environments. The API is accessible via REST, CLI, and MCP, providing flexibility in how developers integrate the service. The service also provides a free tier for initial testing.
How does the service ensure thread continuity?
The service includes a feature for thread continuity, which ensures that replies continue the correct conversation. This is achieved by using a thread_id to resume the right agent conversation. The service also provides a free tier for initial testing.
What are the attachment capabilities?
The service includes a feature for attachments, which allows users to send and receive files up to 25 MB in size. This is useful for exchanging larger documents and media files between the agent and the user. The service also provides a free tier for initial testing.
What is the official website of CarlyEmail?
The official website of CarlyEmail is carlyemail.com.
How is CarlyEmail rated on Trustburn?
On Trustburn, CarlyEmail has a rating of 4.5 out of 5 based on 4 reviews.
Post your question publicly — other visitors, and whoever manages this page, can answer. It will be visible on this page.
Want to hear about this company again? Follow it and we’ll email you when a new review appears.
Based on reviews, listing data and the company's website. Verify anything important with the company directly.
4 Reviews
The service provides a functional API for attaching email to AI agents. The free tier includes three inboxes and one thousand emails. Setup appears straightforward with SDKs for TypeScript and Python.
For developers seeking to integrate email capabilities into their AI agents, CarlyEmail offers a streamlined API that supports various frameworks including LangChain, OpenAI, and Claude. The service provides three free inboxes and allows for one thousand emails monthly without requiring a credit card, making it an accessible starting point. The technical implementation is straightforward, allowing agents to create inboxes, list messages, and reply within the same thread. This continuity ensures that conversations remain intact. Additionally, features like SPF, DKIM, and DMARC setup for custom domains add professional reliability. The availability of MCP servers further extends its utility for compatible agents. While the pricing structure becomes relevant after the free tier, the initial offering is sufficient for many small-scale deployments.
CarlyEmail provides an elegant solution for attaching real inboxes to any AI agent runtime. The ability to receive signed webhook events ensures that your application reacts instantly to incoming mail. With support for multiple protocols and generous free tiers, it serves as a robust foundation for building responsive, email-driven agent workflows with minimal configuration overhead.
Questions & Answers
No questions yet — be the first to ask.
Sign in to post
Your text is saved — you'll come right back to post.
or with email
Don't have an account? Create one
News & Press
No news yet. This is where the business shares its own updates and press.
Photos
No photos yet. Photos shared by reviewers will show up here.
About CarlyEmail
CarlyEmail provides an email-integration service designed for AI agents. It offers real inboxes on its own or a custom domain, along with SDK, MCP, CLI, and REST tools for sending and receiving email. The platform delivers signed webhook or WebSocket events that wake an agent runtime when new mail arrives and preserves thread continuity so that replies continue the correct conversation. It is compatible with several agent frameworks, including LangChain, OpenAI Agents SDK, Claude Agent SDK, Vercel AI SDK, Mastra, and Cloudflare Agents, and provides TypeScript and Python libraries. A free tier is mentioned that includes three inboxes and a monthly limit of one thousand emails.
- Website
- carlyemail.com
