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 Google ADK 14 tools — connect in under 2 minutes

Name: Resend Alternative
Availability: InStock
Author: Vinkius

google.github.io/adk-docs/tools/mcp-tools

Built by Vinkius GDPR 14 Tools SDK

Google Agent Development Kit (ADK) is Google's framework for building production AI agents. Add Resend Alternative as an MCP tool provider through the Vinkius and your ADK agents can call every tool with full schema introspection.

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

from google.adk.agents import Agent
from google.adk.tools.mcp_tool import McpToolset
from google.adk.tools.mcp_tool.mcp_session_manager import (
    StreamableHTTPConnectionParams,
)

# Your Vinkius token — get it at cloud.vinkius.com
mcp_tools = McpToolset(
    connection_params=StreamableHTTPConnectionParams(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
    )
)

agent = Agent(
    model="gemini-2.5-pro",
    name="resend_alternative_agent",
    instruction=(
        "You help users interact with Resend Alternative "
        "using 14 available tools."
    ),
    tools=[mcp_tools],
)

Fully ManagedVinkius Servers

60%Token savings

High SecurityEnterprise-grade

IAMAccess control

EU AI ActCompliant

DLPData protection

V8 IsolateSandboxed

Ed25519Audit chain

<40msKill switch

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.

Google ADK natively supports Resend Alternative as an MCP tool provider — declare the Vinkius Edge URL and the framework handles discovery, validation, and execution automatically. Combine 14 tools with Gemini's long-context reasoning for complex multi-tool workflows, with production-ready session management and evaluation built in.

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 Google ADK 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 Google ADK via MCP

Follow these steps to integrate the Resend Alternative MCP Server with Google ADK.

Install Google ADK

Run pip install google-adk

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Create the agent

Save the code above and integrate into your ADK workflow

Explore tools

The agent will discover 14 tools from Resend Alternative via MCP

Why Use Google ADK with the Resend Alternative MCP Server

Google ADK provides unique advantages when paired with Resend Alternative through the Model Context Protocol.

Google ADK natively supports MCP tool servers — declare a tool provider and the framework handles discovery, validation, and execution

Built on Gemini models, ADK provides long-context reasoning ideal for complex multi-tool workflows with Resend Alternative

Production-ready features like session management, evaluation, and deployment come built-in — not bolted on

Seamless integration with Google Cloud services means you can combine Resend Alternative tools with BigQuery, Vertex AI, and Cloud Functions

Resend Alternative + Google ADK Use Cases

Practical scenarios where Google ADK combined with the Resend Alternative MCP Server delivers measurable value.

Enterprise data agents: ADK agents query Resend Alternative and cross-reference results with internal databases for comprehensive analysis

Multi-modal workflows: combine Resend Alternative tool responses with Gemini's vision and language capabilities in a single agent

Automated compliance checks: schedule ADK agents to query Resend Alternative regularly and flag policy violations or configuration drift

Internal tool platforms: build self-service agent platforms where teams connect their own MCP servers including Resend Alternative

Resend Alternative MCP Tools for Google ADK (14)

These 14 tools become available when you connect Resend Alternative to Google ADK 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 Google ADK

Ready-to-use prompts you can give your Google ADK 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 Google ADK

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

McpToolset not found

Update: pip install --upgrade google-adk

Resend Alternative + Google ADK FAQ

Common questions about integrating Resend Alternative MCP Server with Google ADK.

How does Google ADK connect to MCP servers?

Import the MCP toolset class and pass the server URL. ADK discovers and registers all tools automatically, making them available to your agent's tool-use loop.

Can ADK agents use multiple MCP servers?

Yes. Declare multiple MCP tool providers in your agent configuration. ADK merges all tool schemas and the agent can call tools from any server in a single turn.

Which Gemini models work best with MCP tools?

Gemini 2.0 Flash and Pro models both support function calling required for MCP tools. Flash is recommended for latency-sensitive use cases, Pro for complex reasoning.