Eleidon: Email Security for AI Agents
Eleidon helps businesses operating AI agents verify the authenticity of inbound emails and sign outbound messages. It is designed for teams that need to help prevent agents from acting on spoofed emails.
At a glance
- Category
- Security
- Best for
- AI agent developers, Businesses using AI for email automation, Companies with agentic workflows, Platforms deploying multiple AI agents
- Pricing
- Signing is free and unlimited. Verification is metered by plan: Free (100/mo), Starter ($9/mo for 1,000), Pro ($29/mo for 10,000), and Platform ($89/mo for 100,000).
- Key use cases
- Reducing Risk of Fraudulent Agent Actions, Authenticating Agent Communications, Establishing Cryptographic Proof
- Official website
- eleidon.com
Eleidon is a security service designed for AI agents using email. While standard protocols like SPF and DKIM verify servers and domains, Eleidon is designed to verify the identity of the agent itself using cryptographic keypairs.
The tool is for developers and operations managers deploying AI agents that handle business tasks via email. It supports agents signing outgoing messages so recipients can verify the sender's identity and check if the content was altered in transit.
For inbound email, the service provides a verification endpoint that returns a confidence score. This may help prevent AI agents from executing commands—such as canceling orders or changing account details—based on fraudulent or spoofed emails.
Buyers should consider their monthly verification volume when choosing a plan, as signing is unlimited but verification is metered. Technical stacks should be checked against available SDKs for Python, TypeScript, or the Model Context Protocol.
Key Features
Adds a cryptographic header to outgoing emails using a private key, which allows recipients to verify the agent's identity.
An API endpoint that verifies inbound emails and returns an agent identity and confidence score.
Provides a numerical value indicating the likelihood that a message is authentic and has not been tampered with.
Supports generating keypairs and registering public keys with claimed inboxes to establish a verified identity.
Includes libraries for TypeScript, Python (PyNaCl-powered), and the Model Context Protocol (MCP).
Use Cases
Verifying inbound email authenticity before an AI agent processes a request to help prevent actions based on spoofed addresses.
Signing outbound notifications, such as shipping confirmations, so recipients can verify the message came from a legitimate agent.
Using cryptographic identity to maintain a record of which agent sent or received a specific communication.
Best For
Pricing
Signing is free and unlimited. Verification is metered by plan: Free (100/mo), Starter ($9/mo for 1,000), Pro ($29/mo for 10,000), and Platform ($89/mo for 100,000).
FAQ
It allows AI agents to sign outgoing emails so recipients can verify authenticity and verifies inbound emails so agents may avoid acting on fraudulent messages.
Signing is free. Verification plans include a free tier (100/mo), Starter at $9/mo, Pro at $29/mo, and Platform at $89/mo based on verification volume.
No, the free tier does not require a credit card.
Eleidon provides SDKs for TypeScript and Python, as well as a CLI and support for the Model Context Protocol (MCP).
Source category: Security
Source subcategory: Email Security
