Mailgent
Show HN: Email and identity stack for AI Agents
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What is Mailgent?
Mailgent is an identity and payments infrastructure platform designed specifically for AI agents. It gives every AI agent a verifiable identity including a dedicated email address ([email protected]), an encrypted vault for storing credentials, 2FA capability without requiring a phone number, a calendar, and an optional KYC option. All of these components form one verifiable identity on the open internet rather than five disconnected accounts.
The platform also includes a payment system called Mailgent Pay, which provides every agent with a non-custodial USDC wallet on the Base blockchain. This wallet allows agents to pay any x402-priced URL or MCP tool per call, with payments signed and settled in about two seconds. Spending is bounded by a mandate that the human user controls, ensuring agents cannot exceed approved limits.
Mailgent is built for developers and teams building autonomous AI agents who need their agents to operate independently online. It works with any agent that speaks HTTP through a REST API and native MCP server. The platform integrates with major agent frameworks including LangChain, CrewAI, LlamaIndex, Haystack, Vercel AI SDK, Cursor, Goose, Open WebUI, Notion, Claude, OpenAI, Gemini, DeepSeek, Cohere, Perplexity, and many more. Identity and Pay live in the same console, allowing users to open a project and switch on what they need when they need it.
Mailgent pricing
Pricing model: Freemium
Free for now during launch phase. No credit card required to start. The platform is currently free while in launch with no card needed. USDC on Base is used for payments. The website states 'Free for now • USDC on Base • No card to start' and 'Free while we're in launch. No card.'
Mailgent pros
- Dedicated email address for each agent at mailgent.dev domain
- DKIM-signed outbound emails for verifiable agent identity
- Encrypted vault with AES-256 encryption for storing credentials
- 2FA capability without requiring a phone number (TOTP-based)
- Built-in calendar functionality for agent scheduling
- Optional KYC for enhanced verification
- Non-custodial USDC wallet on Base blockchain
- x402 payment protocol support for instant machine payments
- Payments settle in approximately 2 seconds
- Spending mandates controlled by human users
- Single console for both identity and payments
- Unified audit trail for all agent actions
- REST API for HTTP-native integration
- Native MCP server for MCP clients
- Works with 30+ major AI agent frameworks out of the box
- Free tier available during launch with no credit card required
- Each agent identity is fully isolated and auditable
- Automatic email threading with In-Reply-To stitching
- Sub-200ms inbound email delivery
- Revocable identity - revoke once and all capabilities shut off
Mailgent cons
- Currently free only during launch phase - paid plans not yet defined
- Payments limited to USDC on Base blockchain only
- x402 protocol adoption still emerging in the market
- No custodial wallet option for less crypto-savvy users
- Optional KYC means unverified agents may have limited access
- Calendar features less detailed than dedicated calendar services
- Vault encryption key management not fully user-controlled
- MCP server requires API key authentication setup
- Limited to agents that speak HTTP (no SMS voice without add-ons)
- No built-in email template editor or visual designer
Frequently asked questions about Mailgent
What is Mailgent and what does it do?
Mailgent is an identity and payments infrastructure platform for AI agents. It gives every AI agent a verifiable identity including email, encrypted vault, 2FA without a phone, calendar, and optional KYC. It also provides a non-custodial USDC wallet on Base that pays x402-priced URLs in seconds. All of this lives in one console with one wallet and one audit trail.
What email address does my agent get?
Every agent gets a dedicated email address at the mailgent.dev domain (format: [email protected]). This is not a forwarding alias or shared mailbox - it's a real email address with full send, receive, threading, and DKIM-signed outbound capabilities.
How does the x402 payment system work?
x402 is an open payment protocol for instant USDC payments over HTTP. Every agent gets a non-custodial USDC wallet on Base that pays any x402-priced URL or MCP tool per call. Payments are signed, settled in about two seconds, and bounded by a mandate you control. The agent automatically negotiates payment when it requests access to a paid service.
Is the wallet custodial or non-custodial?
The wallet is non-custodial. You control your embedded wallet through the Mailgent console, and Mailgent does not have custody of your funds. The agent's wallet is tied to the identity, and you control spending through mandates you set.
What AI agent frameworks does Mailgent support?
Mailgent works with any agent that speaks HTTP through its REST API and native MCP server. It has built-in integrations with LangChain, CrewAI, LlamaIndex, Haystack, Vercel AI SDK, Cursor, Goose, Open WebUI, Notion, Lovable, Manus, Make, n8n, Claude, OpenAI, Gemini, DeepSeek, Cohere, Perplexity, ByteDance, vLLM, Ollama, and OpenRouter.
How does agent 2FA work without a phone?
Mailgent provides 2FA without requiring a phone number by using TOTP (Time-based One-Time Password). The agent can see the 2FA challenge, call the vault to get the TOTP code, solve it, and log an audit trail. This enables fully autonomous authentication flows without a human in the loop.
What is the encrypted vault used for?
The encrypted vault stores API keys, OAuth tokens, passwords, and other credentials with AES-256 encryption. Every read and write is scoped and audit-logged so nothing leaks silently. The vault is per-agent, meaning each agent has its own isolated vault where your API keys never live in prompts, logs, or .env files.
How do I set spending limits for my agent?
You set spending limits manually through the Mailgent console by defining a mandate. The mandate bounds what the agent can pay, ensuring it cannot exceed your approved limits. The agent respects these limits but cannot change them. This prevents unauthorized spending while allowing autonomous payment for approved services.
What happens if a payment fails?
If a payment fails, no funds are deducted. Common reasons include insufficient balance, network issues, or service unavailable. Your agent will notify you of the failure and can retry the payment. Since payments are instant and onchain through x402, refunds depend on the service provider and you would contact them directly.
Do I need a credit card to start using Mailgent?
No, you do not need a credit card to start. Mailgent is free during launch with no card required. You can sign up, create agent identities, and use the identity and payment features without providing a credit card. The website explicitly states 'Free for now • USDC on Base • No card to start'.