--- title: "Resend MCP: review, setup & limitations · Undominated.ai" canonical: https://undominated.ai/mcp-servers/resend/ description: "Connects an assistant to Resend email sending, delivery records and account operations through hosted or local MCP." --- # Resend MCP: review, setup & limitations · Undominated.ai > Connects an assistant to Resend email sending, delivery records and account operations through hosted or local MCP. [← Explore all mcp servers](/mcp-servers/) EMAIL OPERATIONS / Resend # Resend MCP Connects an assistant to Resend email sending, delivery records and account operations through hosted or local MCP. See setup guidance ↓Original source ↗ SOURCE REVIEW Reviewed 2026-09-21 Evidence 9 linked sources Publisher Resend Licence MIT ↗ Revision e6f9faa56ab0 Read what was—and wasn’t—checked ↓ “Connect your AI agent to the Resend platform.” Resend · upstream description ↗ Our analysis follows below. 01 / THE REASONING ## Why this made the selection. - Adds a concrete outbound-email workflow, including message inspection and scheduled-email operations. - The current publisher implementation can be inspected alongside hosted OAuth setup, making its broader account permissions visible. ### A good fit for - Inspecting Resend delivery information while preparing a transactional-email workflow. - Sending or scheduling an explicitly approved message from a configured Resend domain. ### Weigh up before choosing - This is broader than an email drafting tool: enabled operations can send real messages and administer contacts, broadcasts, domains and API keys. - The local send handler can read an attachment from a supplied file path and transmit it; use an appropriately restricted process and credentials. - Source review does not establish a confirmation gate before sending, deliverability or secure public self-hosting. Prefer the documented hosted connection unless you can manage the local service boundary. 02 / THE REVIEW RECORD ## What we actually inspected. Source review has boundaries. A clear record is more useful than a “safe” badge. ### Material inspected - README.md: current package identity, hosted OAuth endpoint and client-specific setup. - package.json, src/index.ts and src/cli/resolve.ts: executable, runtime and credential requirements. - src/server.ts, src/tools/emails.ts and src/transports/http.ts: tool registration, sends, attachments and HTTP sessions. - LICENSE: MIT for repository source. - src/tools/apiKeys.ts: key creation, listing and removal tools. ### Our findings - The server registers administration tool groups as well as email tools, so a narrow send-only description would omit material authority. - The send handler reads filePath attachments with fs.readFile and calls resend.emails.send; client-side review must happen before that tool executes. - Stdio requires RESEND_API_KEY at startup. HTTP uses connecting-client credentials; the hosted OAuth path is documented separately. - The API-key creation tool returns the newly created token in its MCP result, so key administration also exposes credentials to the connected host. - The local HTTP source calls app.listen(port) without a bind address even though its log prints a loopback URL; that log is not evidence of network isolation. ### Not established by this review - No server, account connection, email send, attachment access, delivery flow or authentication isolation was executed. The review applies to the material and revision named here. A newer upstream release can change its behavior. 03 / PUT IT TO WORK ## Connect a server deliberately. Upstream setup instructions ↗ DOCUMENTED COMMAND claude mcp add --transport http resend https://mcp.resend.com/mcp Copy command ↗ Copying does not execute this command. It may retrieve a newer version than the reviewed source. - The command configures Resend’s hosted service in Claude Code; open /mcp and complete OAuth. - The JSON example is for Cursor. Use the publisher’s matching guide for other clients. - For local stdio, provide RESEND_API_KEY securely to the documented npx -y resend-mcp process and verify the sending domain before sending. ### Before you start - A Resend account with the required sending/domain permissions and an appropriate MCP client. - For local execution, a compatible Node.js runtime and a Resend API key. ### Documented configuration example Use the client and authentication context described in the setup guidance. Configuration formats vary between hosts. { "mcpServers": { "resend": { "url": "https://mcp.resend.com/mcp" } } } Copy configuration ↗ ### Compatibility Hosted Streamable HTTP with OAuth or an API key; the example is the documented Cursor configuration. · Local stdio clients or the documented self-hosted HTTP alternative. ### Implementation TypeScript ### Transports stdio · Streamable HTTP ### Resend account / real email and account writes - Reads email and account information permitted by the authenticated Resend identity. - Can send messages, access local attachments in local mode and perform account mutations through registered tools. - API-key creation can return a new credential in the tool result. ### Cost model Resend’s email and account plans, usage allowances and applicable overages govern service costs; the MIT source licence does not include delivery service. 04 / FOLLOW THE EVIDENCE ## The source trail. Our notes are separate from the original resource. Check upstream before adopting a new version. - Current server identity and setup ↗ Checked 2026-09-21 https://github.com/resend/resend-mcp/blob/e6f9faa56ab014e883739c160433f96e55c98eff/README.md Supports: upstreamDescription, descriptionSourceUrl, summary, whySelected, bestFor, install, compatibility, transports, configExample, access - Registered account tool groups ↗ Checked 2026-09-21 https://github.com/resend/resend-mcp/blob/e6f9faa56ab014e883739c160433f96e55c98eff/src/server.ts Supports: summary, whySelected, review, access, limitations - Email and attachment implementation ↗ Checked 2026-09-21 https://github.com/resend/resend-mcp/blob/e6f9faa56ab014e883739c160433f96e55c98eff/src/tools/emails.ts Supports: bestFor, review, access, limitations - Credential configuration ↗ Checked 2026-09-21 https://github.com/resend/resend-mcp/blob/e6f9faa56ab014e883739c160433f96e55c98eff/src/cli/resolve.ts Supports: review, install, access - HTTP transport implementation ↗ Checked 2026-09-21 https://github.com/resend/resend-mcp/blob/e6f9faa56ab014e883739c160433f96e55c98eff/src/transports/http.ts Supports: review, transports, limitations - Package manifest ↗ Checked 2026-09-21 https://github.com/resend/resend-mcp/blob/e6f9faa56ab014e883739c160433f96e55c98eff/package.json Supports: language, install.prerequisites - Resend service plans ↗ Checked 2026-09-21 https://resend.com/pricing Supports: access.cost - Repository licence ↗ Checked 2026-09-21 https://github.com/resend/resend-mcp/blob/e6f9faa56ab014e883739c160433f96e55c98eff/LICENSE Supports: license - API-key administration tools ↗ Checked 2026-09-21 https://github.com/resend/resend-mcp/blob/e6f9faa56ab014e883739c160433f96e55c98eff/src/tools/apiKeys.ts Supports: access, limitations, review KEEP COMPARING ## Other approaches to consider. Related by category or shared topics. These are alternatives to inspect, not a measured quality order. [### Asana MCP V2 ↗ Asana’s current workspace-scoped MCP connection for task, project and portfolio workflows.](/mcp-servers/asana/)[### Canva MCP ↗ A hosted connection for authorized Canva design discovery, creation, editing and export workflows.](/mcp-servers/canva/)[### GitHub MCP Server ↗ Connects an assistant to repository, issue, pull-request and workflow operations with selectable toolsets and account permissions.](/mcp-servers/github/) [AI Tools ↗](/tools/)[Skills ↗](/skills/)[Agents ↗](/agents/)[MCP Servers ↗](/mcp-servers/)