Bring Transactional Email
to CrewAI
Create your Vinkius account to connect Resend to CrewAI and start using all 10 AI tools in minutes. Fully managed, enterprise secure, and ready to use without writing a single line of code. No hosting, no server setup — just connect and start using.
GDPR Free for SubscribersCompatible with every major AI agent and IDE
Gemini
What is the Resend MCP Server?
Connect your Resend account to any AI agent and take full control of your email infrastructure through natural conversation.
What you can do
- Send Emails — Dispatch transactional emails with HTML content, attachments, and reply-to headers instantly from your agent
- Track Delivery — Retrieve complete delivery metadata, bounce information, and open/click analytics for any sent email
- Domain Management — List verified sending domains, inspect DNS records (SPF/DKIM), and trigger verification checks
- Audience & Contact Management — Browse audiences, list subscribers, and add new contacts programmatically for broadcast campaigns
- Broadcast Campaigns — Monitor active broadcast campaigns, check delivery statuses, and audit mass email operations
- API Key Auditing — List active API keys and their permission scopes to maintain security hygiene
How it works
- Subscribe to this server
- Enter your Resend API Key (starts with
re_) - Start managing your email infrastructure from Claude, Cursor, or any MCP-compatible client
Your AI becomes a dedicated email operations center. No more switching between dashboard tabs to check if a critical transactional email was delivered.
Who is this for?
- Developers — send test emails, verify domain DNS, and debug delivery issues without leaving the code editor
- Marketing Teams — inspect broadcast campaign statuses and audience lists through conversational queries
- DevOps Engineers — audit API keys, monitor domain verification, and automate email infrastructure checks
Built-in capabilities (10)
Returns DNS records to configure. Add a new sending domain
Add a contact to an audience
Get domain details
Get email delivery status
List all API keys
List email audiences
List contacts in an audience
List verified sending domains
Each email needs from, to, subject, and html fields. Send batch of emails
Returns email ID for tracking delivery status. Send a transactional email
Why CrewAI?
When paired with CrewAI, Resend becomes a first-class tool in your multi-agent workflows. Each agent in the crew can call Resend tools autonomously, one agent queries data, another analyzes results, a third compiles reports, all orchestrated through Vinkius with zero configuration overhead.
- —
Multi-agent collaboration lets you decompose complex workflows into specialized roles, one agent researches, another analyzes, a third generates reports, each with access to MCP tools
- —
CrewAI's native MCP integration requires zero adapter code: pass Vinkius Edge URL directly in the
mcpsparameter and agents auto-discover every available tool at runtime - —
Built-in task delegation and shared memory mean agents can pass context between steps without manual state management, enabling multi-hop reasoning across tool calls
- —
Sequential and hierarchical crew patterns map naturally to real-world workflows: enumerate subdomains → analyze DNS history → check WHOIS records → compile findings into actionable reports
Resend in CrewAI
Why run Resend with Vinkius?
The Resend connection runs on our fully managed, secure cloud infrastructure. We handle the hosting, maintenance, and security so you don't have to deal with servers or code. All 10 tools are ready to work instantly without any complex setup.
You stay in complete control of your data. Your AI only accesses the information you approve, keeping your sensitive passwords and private details completely safe. Plus, with automatic optimizations, your AI works faster and more efficiently.
* Every connection is hosted and maintained by Vinkius. We handle the security, updates, and infrastructure so you don't have to write code or manage servers. See our infrastructure
Over 4,000 integrations ready for AI agents
Explore a vast library of pre-built integrations, optimized and ready to deploy.
Connect securely in under 30 seconds
Generate tokens to authenticate and link external services in a single step.
Complete visibility into every agent action
Audit live requests, latency, success rates, and active security compliance policies.
Optimize spending and track token ROI
Analyze real-time token consumption and cost metrics detailed by connection.
Explore our live AI Agents Analytics dashboard to see it all working
This dashboard is included when you connect Resend using Vinkius. You will never be left in the dark about what your AI agents are doing with your tools.
Resend and 4,000+ other AI tools. No hosting, no code, ready to use.
Professionals who connect Resend to CrewAI through Vinkius don't need to write code, manage servers, or worry about security. Everything is pre-configured, secure, and runs automatically in the background.
Raw MCP | Vinkius | |
|---|---|---|
| Ready-to-use MCPs | Find and configure each manually | 4,000+ MCPs ready to use |
| Connection Setup | Manual coding & server setup | 1-click instant connection |
| Server Hosting | You host it yourself (needs 24/7 uptime) | 100% hosted & managed by Vinkius |
| Security & Privacy | Stored in plaintext config files | Bank-grade encrypted vault |
| Activity Visibility | Blind execution (no logs or tracking) | Live dashboard with real-time logs |
| Cost Control | Runaway AI token spend risk | Automatic budget limits |
| Revoking Access | Must delete files or code to stop | 1-click disconnect button |
How Vinkius secures
Resend for CrewAI
Every request between CrewAI and Resend is protected by our secure gateway. We automatically keep your sensitive data private, prevent unauthorized access, and let you disconnect instantly at any time.
Frequently asked questions
Can I send an email with HTML content and track whether it was delivered?
Absolutely. Use the send_email tool with your HTML body, then use get_email with the returned ID to check delivery status, open events, and bounce details in real time.
How do I check if my sending domain DNS records are correctly configured?
Run list_domains to find your domain ID, then use get_domain to inspect the full DNS record set (SPF, DKIM, return path). If records are pending, trigger verify_domain to re-check.
Can I add subscribers to an audience for broadcast campaigns?
Yes. First use list_audiences to get the target audience ID, then call create_contact with the subscriber's email and optional name fields. The contact is immediately available for broadcast targeting.
How does CrewAI discover and connect to MCP tools?
CrewAI connects to MCP servers lazily. when the crew starts, each agent resolves its MCP URLs and fetches the tool catalog via the standard tools/list method. This means tools are always fresh and reflect the server's current capabilities. No tool schemas need to be hardcoded.
Can different agents in the same crew use different MCP servers?
Yes. Each agent has its own mcps list, so you can assign specific servers to specific roles. For example, a reconnaissance agent might use a domain intelligence server while an analysis agent uses a vulnerability database server.
What happens when an MCP tool call fails during a crew run?
CrewAI wraps tool failures as context for the agent. The LLM receives the error message and can decide to retry with different parameters, fall back to a different tool, or mark the task as partially complete. This resilience is critical for production workflows.
Can CrewAI agents call multiple MCP tools in parallel?
CrewAI agents execute tool calls sequentially within a single reasoning step. However, you can run multiple agents in parallel using process=Process.parallel, each calling different MCP tools concurrently. This is ideal for workflows where separate data sources need to be queried simultaneously.
Can I run CrewAI crews on a schedule (cron)?
Yes. CrewAI crews are standard Python scripts, so you can invoke them via cron, Airflow, Celery, or any task scheduler. The crew.kickoff() method runs synchronously by default, making it straightforward to integrate into existing pipelines.
MCP tools not discovered
Ensure the Edge URL is correct. CrewAI connects lazily when the crew starts. check console output.
Agent not using tools
Make the task description specific. Instead of "do something", say "Use the available tools to list contacts".
Timeout errors
CrewAI has a 10s connection timeout by default. Ensure your network can reach the Edge URL.
Rate limiting or 429 errors
Vinkius enforces per-token rate limits. Check your subscription tier and request quota in the dashboard. Upgrade if you need higher throughput.
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