Resend MCP Server
for AI Agents
Connect your AI agent to StackOne's Resend MCP server and give it 38 MCP tools out of the box. Auth, tool execution, and security all managed.
StackOne 
Coverage
38 Agent Actions
Create, read, update, and delete across Resend — and extend your agent's capabilities with custom actions.
Authentication
Agent Tool Authentication
Per-user OAuth in one call. Your Resend MCP server gets session-scoped tokens with zero credentials stored on your infra.
Agent Auth →
Security
Agent Protection
Every Resend tool response scanned for prompt injection in milliseconds — 88.7% accuracy, all running on CPU.
Prompt Injection Defense →
Performance
Max Agent Context. Min Cost.
Free up to 96% of your agent's context window to enhance reasoning and reduce cost, on every Resend call.
Tools Discovery →What is the Resend MCP Server?
A Resend MCP server lets AI agents read and write Resend data through the Model Context Protocol — Anthropic's open standard for connecting LLMs to external tools. StackOne's Resend MCP server ships with 38 pre-built actions, fully extensible via the Connector Builder — plus managed authentication, prompt injection defense, observability, and agent execution runtime. Connect it from MCP clients like Claude Desktop, Claude Code, Cursor, Goose, and VS Code, or from agent frameworks like OpenAI Agents SDK, LangChain, and Vercel AI SDK.
All Resend MCP Tools
Every action from Resend's API, ready for your agent. Create, read, update, and delete — scoped to exactly what you need.
API Keys
- Create API Key
Create an API key with an optional permission tier and domain restriction; the token is returned only once.
- List API Keys
List all API keys for the account.
- Update API Key
Rename an existing API key.
- Delete API Key
Permanently delete an API key so it can no longer authenticate requests.
Broadcasts
- Create Broadcast
Create a broadcast email targeted at a segment, optionally sending it immediately.
- Send Broadcast
Send or schedule an existing broadcast.
- Retrieve Broadcast
Retrieve a single broadcast by its id.
- List Broadcasts
List all broadcasts in the account.
- Update Broadcast
Update an existing broadcast.
- Delete Broadcast
Permanently delete a broadcast that has not been sent.
Contacts
- Create Contact
Add a contact with optional name, custom properties, segment membership and topic subscriptions.
- Retrieve Contact
Retrieve a single contact by id or email address.
- List Contacts
List contacts, optionally filtered by segment.
- Update Contact
Update an existing contact by id or email address.
- Delete Contact
Remove a contact from the audience by id or email address.
Domains
- Create Domain
Add a new sending domain and receive the DNS records needed to verify it.
- Retrieve Domain
Retrieve a single domain by its id.
- List Domains
List all domains in the account.
- Update Domain
Update a domain's tracking and TLS settings.
- Delete Domain
Remove a domain so it can no longer be used to send email.
Verify Domains
- Verify Domain
Trigger DNS verification for a domain.
Emails
- Send Email
Send a single email through Resend.
- Send Batch Emails
Send up to 100 emails in a single batch request.
- Retrieve Email
Retrieve a single sent email by its id.
- List Emails
List sent emails for the account.
- Update Email
Update a scheduled email, such as its send time.
Cancel Emails
- Cancel Email
Cancel a scheduled email that has not yet been sent.
Segments
- Create Segment
Create a segment used to group contacts for broadcasts.
- Retrieve Segment
Retrieve a single segment by its id.
- List Segments
List all segments in the account.
- Update Segment
Rename an existing segment.
- Delete Segment
Permanently delete a segment from the account.
Suppressions
- Add Suppression
Add a single email address to the suppression list to stop future sends.
- Add Batch Suppressions
Add multiple email addresses to the suppression list in one request.
- Retrieve Suppression
Retrieve a single suppression by its id.
- List Suppressions
List all suppressed email addresses.
- Remove Suppression
Remove a single suppression by its id.
- Remove Batch Suppressions
Remove multiple suppressions in one request.
Resend AI Agent Use Cases
Connect your AI agent to Resend and help your team scale the marketing operations they run by hand today.
Use StackOne to connect your AI agent to your marketing automation, CRM, and email tools to automate lead nurture email sequences.
ViewUse StackOne to connect your AI agent to your marketing automation, email, and analytics platforms to automate campaign performance reporting.
ViewUse StackOne to connect your AI agent to your document stores, email platforms, and messaging tools to automate content repurposing and distribution.
ViewSet Up Your Resend MCP Server in Minutes
One endpoint. Any framework. Your agent is talking to Resend in under 10 lines of code.
Agent Frameworks
JSON{
"mcpServers": {
"stackone": {
"command": "npx",
"args": [
"-y",
"mcp-remote@latest",
"https://api.stackone.com/mcp?x-account-id=<account_id>",
"--header",
"Authorization: Basic <YOUR_BASE64_TOKEN>"
]
}
}
}Check More marketing MCP Servers
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Platform Resources
MCP Code Mode: Keeping Tool Responses Out of Agent Context
Anthropic's code_execution processes data already in context. Custom MCP code mode keeps raw tool responses in a sandbox. 14K tokens vs 500.
11 min
Comparing BM25, TF-IDF, and Hybrid Search for MCP Tool Discovery
Benchmarking BM25, TF-IDF, and hybrid search for MCP tool discovery across 916 tools. The 80/20 TF-IDF/BM25 hybrid hits 21% Top-1 accuracy in under 1ms.
10 min
Indirect Prompt Injection Defense for MCP Tools: A Technical Guide
MCP tools that read emails, CRM records, and tickets are indirect prompt injection vectors. Here's how we built a two-tier defense that scans tool results in ~11ms.
12 min
MCP vs A2A: Architecture, Security, and When to Use Each
MCP vs A2A: what each protocol standardizes, how they differ, their shared security risks including indirect prompt injection, and when to use one, both, or a hybrid architecture.
12 min
MCP vs API: What Hundreds of Connector Builds Taught Us
MCP wraps APIs, it doesn't replace them. After building hundreds of connectors that serve both, here's when each approach wins.
14 min read
Resend MCP Server FAQ
Does StackOne have a Resend MCP server?
Resend MCP server vs direct API integration — what's the difference?
How does Resend authentication work for AI agents?
origin_owner_id.Are Resend MCP tools vulnerable to prompt injection?
What is the context bloat of a Resend agent and how do I avoid it?
Can I limit which actions my Resend agent can access?
Can I create custom agent actions for my Resend MCP server?
When should I NOT use a Resend MCP server?
What AI frameworks and AI clients does the StackOne Resend MCP server support?
Put your AI agents to work
All the tools you need to build and scale AI agent integrations, with best-in-class connectivity, execution, and security.