Bring Transactional Email
to Mastra AI
Learn how to connect Resend to Mastra AI and start using 11 AI agent tools in minutes. Fully managed, enterprise secure, and ready to use without writing a single line of code.
What is the Resend MCP Server?
Connect your Resend account to any AI agent and take full control of your transactional email orchestration through natural conversation. Resend provides a world-class email infrastructure for developers, and this integration allows you to send emails, monitor domain verification, and manage contact audiences directly from your chat interface.
What you can do
- Email Orchestration — Send high-fidelity emails using custom HTML or text programmatically, with support for batch sending and history retrieval.
- Domain Lifecycle Management — List all managed domains and trigger verification processes directly from the AI interface to ensure deliverability.
- Audience & CRM Control — Create and manage contact audiences and individual subscribers via natural language to maintain your marketing lists.
- API & Security Oversight — Access and monitor your API keys to ensure your integration remains secure and synchronized.
- Operational Monitoring — Track system responses and manage email delivery logs using simple AI commands.
How it works
1. Subscribe to this server
2. Enter your Resend API Key (re_xxxxxxxxx) from your settings
3. Start managing your email infrastructure from Claude, Cursor, or any MCP-compatible client
No more manual dashboard navigation for checking logs or verifying domains. Your AI acts as a dedicated email operations manager or delivery coordinator.
Who is this for?
- Developers & DevOps — quickly send test emails and verify domain DNS records without switching tools.
- Marketing Operations — automate the management of contact audiences and monitor engagement via natural conversation.
- Startup Founders — streamline the retrieval of transactional email history directly within the chat.
Built-in capabilities (11)
Requires email. Add a contact to an audience
Create a new audience
Get details for a specific domain
Get details for a specific email
List all API keys
List contact audiences
List contacts in an audience
List registered domains
List sent emails
Requires from, to, and subject. Send a single email
Verify a domain
Why Mastra AI?
Mastra's agent abstraction provides a clean separation between LLM logic and Resend tool infrastructure. Connect 11 tools through Vinkius and use Mastra's built-in workflow engine to chain tool calls with conditional logic, retries, and parallel execution. deployable to any Node.js host in one command.
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Mastra's agent abstraction provides a clean separation between LLM logic and tool infrastructure. add Resend without touching business code
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Built-in workflow engine chains MCP tool calls with conditional logic, retries, and parallel execution for complex automation
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TypeScript-native: full type inference for every Resend tool response with IDE autocomplete and compile-time checks
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One-command deployment to any Node.js host. Vercel, Railway, Fly.io, or your own infrastructure
Resend in Mastra AI
Resend and 3,400+ other MCP servers. One platform. One governance layer.
Teams that connect Resend to Mastra AI through Vinkius don't need to source, host, or maintain individual MCP servers. Every tool call runs inside a hardened runtime with credential isolation, DLP, and a signed audit chain.
Raw MCP | Vinkius | |
|---|---|---|
| Server catalog | Find and host yourself | 3,400+ managed |
| Infrastructure | Self-hosted | Sandboxed V8 isolates |
| Credential handling | Plaintext in config | Vault + runtime injection |
| Data loss prevention | None | Configurable DLP policies |
| Kill switch | None | Global instant shutdown |
| Financial circuit breakers | None | Per-server limits + alerts |
| Audit trail | None | Ed25519 signed logs |
| SIEM log streaming | None | Splunk, Datadog, Webhook |
| Honeytokens | None | Canary alerts on leak |
| Custom domains | Not applicable | DNS challenge verified |
| GDPR compliance | Manual effort | Automated purge + export |
Why teams choose Vinkius for Resend in Mastra AI
The Resend MCP Server runs on Vinkius-managed infrastructure inside AWS — a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts. All 11 tools execute in hardened sandboxes optimized for native MCP execution.
Your AI agents in Mastra AI only access the data you authorize, with DLP that blocks sensitive information from ever reaching the model, kill switch for instant shutdown, and up to 60% token savings. Enterprise-grade infrastructure, zero maintenance.
* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure
How Vinkius secures
Resend for Mastra AI
Every tool call from Mastra AI to the Resend MCP Server is protected by DLP redaction, cryptographic audit chains, V8 sandbox isolation, kill switch, and financial circuit breakers.
Frequently asked questions
Can my AI automatically find the details for a specific email just by providing its ID?
Yes! Use the get_email tool with the Email ID. Your agent will respond with complete metadata, including delivery status, timestamps, and recipient info in seconds.
How do I find my Resend API Key?
Log in to your Resend dashboard, navigate to the API Keys section, and generate a new key (it will start with re_). Copy and save it securely.
How does Mastra AI connect to MCP servers?
Create an MCPClient with the server URL and pass it to your agent. Mastra discovers all tools and makes them available with full TypeScript types.
Can Mastra agents use tools from multiple servers?
Yes. Pass multiple MCP clients to the agent constructor. Mastra merges all tool schemas and the agent can call any tool from any server.
Does Mastra support workflow orchestration?
Yes. Mastra has a built-in workflow engine that lets you chain MCP tool calls with branching logic, error handling, and parallel execution.
createMCPClient not exported
Install: npm install @mastra/mcp