How do I create a Resend API Key?

Log in to the [**Resend Dashboard**](https://resend.com/api-keys), go to **Settings > API Keys**, click **Create API Key**, select the permission scope (Full Access, Sending, or Domains), give it a name and copy the key immediately — it starts with `re_` and won't be shown again.

Can I send HTML emails with attachments?

Yes! Use the `send_email` tool with the `html` parameter for HTML body content and optionally include attachments. You can also provide a `text` fallback for email clients that don't render HTML. Attachments are passed as objects with filename, content (base64) and content_type.

How do I verify a domain for sending?

Use `create_domain` with your domain name (e.g. "example.com"). Resend will return the SPF and DKIM DNS records you need to add to your DNS provider. After adding the records, use `verify_domain` with the domain ID to trigger re-verification. The domain status will change to "verified" once DNS propagation is complete.

What are the API rate limits?

Resend allows 5 requests per second per team, shared across all API keys. If you exceed this limit, you'll receive a 429 response. Rate limits can be increased by contacting Resend support for verified senders.

Resend Alternative MCP Server for Pydantic AI 14 tools — connect in under 2 minutes

Name: Resend Alternative
Availability: InStock
Author: Vinkius

ai.pydantic.dev/mcp

Built by Vinkius GDPR 14 Tools SDK

Pydantic AI brings type-safe agent development to Python with first-class MCP support. Connect Resend Alternative through the Vinkius and every tool is automatically validated against Pydantic schemas — catch errors at build time, not in production.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

import asyncio
from pydantic_ai import Agent
from pydantic_ai.mcp import MCPServerHTTP

async def main():
    # Your Vinkius token — get it at cloud.vinkius.com
    server = MCPServerHTTP(url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp")

    agent = Agent(
        model="openai:gpt-4o",
        mcp_servers=[server],
        system_prompt=(
            "You are an assistant with access to Resend Alternative "
            "(14 tools)."
        ),
    )

    result = await agent.run(
        "What tools are available in Resend Alternative?"
    )
    print(result.data)

asyncio.run(main())

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Stream every event to Splunk, Datadog, or your own webhook in real-time

* 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

About Resend Alternative MCP Server

Connect your Resend account to any AI agent and take full control of your email infrastructure through natural conversation.

Pydantic AI validates every Resend Alternative tool response against typed schemas, catching data inconsistencies at build time. Connect 14 tools through the Vinkius and switch between OpenAI, Anthropic, or Gemini without changing your integration code — full type safety, structured output guarantees, and dependency injection for testable agents.

What you can do

Email Sending — Send transactional emails with HTML/text bodies, attachments, CC/BCC and reply-to addresses
Batch Sending — Send up to 100 emails in a single API call for bulk notifications
Email Tracking — Retrieve sent email details including delivery status, bounces and complaints
Domain Management — Add, verify, update and delete sending domains with DNS record guidance
API Key Management — Create, list and delete API keys with scoped permissions (full_access, sending, domains)
Scheduled Emails — Update or cancel previously scheduled email deliveries

The Resend Alternative MCP Server exposes 14 tools through the Vinkius. Connect it to Pydantic AI in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect Resend Alternative to Pydantic AI via MCP

Follow these steps to integrate the Resend Alternative MCP Server with Pydantic AI.

Install Pydantic AI

Run pip install pydantic-ai

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Run the agent

Save to agent.py and run: python agent.py

Explore tools

The agent discovers 14 tools from Resend Alternative with type-safe schemas

Why Use Pydantic AI with the Resend Alternative MCP Server

Pydantic AI provides unique advantages when paired with Resend Alternative through the Model Context Protocol.

Full type safety: every MCP tool response is validated against Pydantic models, catching data inconsistencies before they reach your application

Model-agnostic architecture — switch between OpenAI, Anthropic, or Gemini without changing your Resend Alternative integration code

Structured output guarantee: Pydantic AI ensures tool results conform to defined schemas, eliminating runtime type errors

Dependency injection system cleanly separates your Resend Alternative connection logic from agent behavior for testable, maintainable code

Resend Alternative + Pydantic AI Use Cases

Practical scenarios where Pydantic AI combined with the Resend Alternative MCP Server delivers measurable value.

Type-safe data pipelines: query Resend Alternative with guaranteed response schemas, feeding validated data into downstream processing

API orchestration: chain multiple Resend Alternative tool calls with Pydantic validation at each step to ensure data integrity end-to-end

Production monitoring: build validated alert agents that query Resend Alternative and output structured, schema-compliant notifications

Testing and QA: use Pydantic AI's dependency injection to mock Resend Alternative responses and write comprehensive agent tests

Resend Alternative MCP Tools for Pydantic AI (14)

These 14 tools become available when you connect Resend Alternative to Pydantic AI via MCP:

cancel_email

The email must be in "scheduled" status. Provide the email ID. Cancel a scheduled email

create_api_key

Requires a name and optionally the permission scope (full_access, sending, domains). Returns the key value which is shown ONLY ONCE — make sure to copy it immediately. Create a new API key in Resend

create_domain

Requires the domain name (e.g. "example.com"). Optionally set the AWS SES region. Returns the domain ID and the DNS records (SPF, DKIM) you need to configure for verification. Add a new domain to Resend

delete_api_key

The key will no longer be able to authenticate API requests. Provide the API key ID from list_api_keys. WARNING: this action is irreversible. Delete an API key from Resend

delete_domain

All DNS records associated with the domain will be invalidated. Provide the domain ID. WARNING: this action is irreversible. Delete a domain from Resend

get_domain

Provide the domain ID from list_domains. Get details for a specific domain

get_email

Returns the sender, recipient(s), subject, creation date, last event (delivered, bounced, complained) and scheduled_at if applicable. Get details for a sent email

list_api_keys

Returns key name, ID, creation date and permission scope (full_access, sending, domains). Note: actual key values are NOT returned for security. List API keys in your Resend account

list_domains

Each domain shows its name, status (verified, not_verified, pending), region, SPF/DKIM records and creation date. Use this to verify which domains are ready for sending emails. List verified domains in Resend

list_emails

Returns email ID, from, to, subject, creation date and last event status. Results are paginated and ordered by most recent first. List recently sent emails

send_batch_emails

Provide a JSON array of email objects, each with from, to, subject and optionally html/text. Each email in the batch is counted individually against your quota. Returns an array of results with IDs for each email. Send a batch of emails via Resend

send_email

Requires the sender address (from), recipient(s) (to) and subject. Optionally provide HTML body, plain text body, reply-to address, CC/BCC recipients and attachments. The from address must use a verified domain configured in Resend. Returns the email ID for tracking. Send an email via Resend

update_email

The email must be in "scheduled" status. Provide the email ID and the new scheduled_at timestamp (ISO 8601). Update a scheduled email

verify_domain

Use this after adding or updating SPF/DKIM records in your DNS provider. Returns the updated domain status. Verify a domain's DNS records

Example Prompts for Resend Alternative in Pydantic AI

Ready-to-use prompts you can give your Pydantic AI agent to start working with Resend Alternative immediately.

"Send a welcome email to newuser@example.com from onboarding@myapp.com."

"Show me all domains configured in my Resend account."

"Create a new API key called 'production-sending' with sending permissions only."

Troubleshooting Resend Alternative MCP Server with Pydantic AI

Common issues when connecting Resend Alternative to Pydantic AI through the Vinkius, and how to resolve them.

MCPServerHTTP not found

Update: pip install --upgrade pydantic-ai

Resend Alternative + Pydantic AI FAQ

Common questions about integrating Resend Alternative MCP Server with Pydantic AI.

How does Pydantic AI discover MCP tools?

Create an MCPServerHTTP instance with the server URL. Pydantic AI connects, discovers all tools, and generates typed Python interfaces automatically.

Does Pydantic AI validate MCP tool responses?

Yes. When you define result types as Pydantic models, every tool response is validated against the schema. Invalid data raises a clear error instead of silently corrupting your pipeline.

Can I switch LLM providers without changing MCP code?

Absolutely. Pydantic AI abstracts the model layer — your Resend Alternative MCP integration works identically with OpenAI, Anthropic, Google, or any supported provider.