Bring Transactional Email
to OpenAI Agents SDK
Learn how to connect MailerSend to OpenAI Agents SDK and start using 12 AI agent tools in minutes. Fully managed, enterprise secure, and ready to use without writing a single line of code.
What is the MailerSend MCP Server?
Connect your MailerSend account to any AI agent and manage transactional email through natural conversation.
What you can do
- Email Sending — Send transactional and bulk emails with templates
- Template Management — Create and manage email templates with variables
- Delivery Analytics — Track opens, clicks, bounces, and delivery rates
- Domain Management — Configure sending domains and DNS records
- Recipient Management — Manage suppression lists and blocklists
- Activity Logs — Browse detailed email activity and event logs
How it works
1. Subscribe to this server
2. Enter your MailerSend API Token
3. Start sending email from Claude, Cursor, or any MCP-compatible client
Who is this for?
- Developers — integrate transactional email with rich analytics
- Product Teams — manage email templates and delivery
- DevOps — monitor domain health and deliverability
Built-in capabilities (12)
Check plan quotas
Check usage stats
Get domain info
Get message status
Get template info
Get notification configs
). Check email logs
List saved templates
List verified domains
List specific messages
Send with template
Send custom email
Why OpenAI Agents SDK?
The OpenAI Agents SDK auto-discovers all 12 tools from MailerSend through native MCP integration. Build agents with built-in guardrails, tracing, and handoff patterns. chain multiple agents where one queries MailerSend, another analyzes results, and a third generates reports, all orchestrated through Vinkius.
- —
Native MCP integration via
MCPServerSse, pass the URL and the SDK auto-discovers all tools with full type safety - —
Built-in guardrails, tracing, and handoff patterns let you build production-grade agents without reinventing safety infrastructure
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Lightweight and composable: chain multiple agents and MCP servers in a single pipeline with minimal boilerplate
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First-party OpenAI support ensures optimal compatibility with GPT models for tool calling and structured output
MailerSend in OpenAI Agents SDK
MailerSend and 3,400+ other MCP servers. One platform. One governance layer.
Teams that connect MailerSend to OpenAI Agents SDK 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 MailerSend in OpenAI Agents SDK
The MailerSend 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 12 tools execute in hardened sandboxes optimized for native MCP execution.
Your AI agents in OpenAI Agents SDK 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
MailerSend for OpenAI Agents SDK
Every tool call from OpenAI Agents SDK to the MailerSend MCP Server is protected by DLP redaction, cryptographic audit chains, V8 sandbox isolation, kill switch, and financial circuit breakers.
Frequently asked questions
Can I send transactional emails with templates?
Yes. Send emails using pre-built templates with dynamic variables, or send raw HTML content with full delivery tracking.
Can I manage domains and DNS records?
Yes. Configure sending domains, verify DNS records (SPF, DKIM, DMARC), and monitor domain health and reputation.
What API does MailerSend use?
Bearer authentication against api.mailersend.com/v1.
How does the OpenAI Agents SDK connect to MCP?
Use MCPServerSse(url=...) to create a server connection. The SDK auto-discovers all tools and makes them available to your agent with full type information.
Can I use multiple MCP servers in one agent?
Yes. Pass a list of MCPServerSse instances to the agent constructor. The agent can use tools from all connected servers within a single run.
Does the SDK support streaming responses?
Yes. The SDK supports SSE and Streamable HTTP transports, both of which work natively with Vinkius.
MCPServerStreamableHttp not found
Ensure you have the latest version: pip install --upgrade openai-agents
Agent not calling tools
Make sure your prompt explicitly references the task the tools can help with.