Vinkius

Mailosaur MCP. Validate every email and SMS message flow.

Mailosaur gives your AI agent full control over virtual inboxes and SMS message streams. It lets you automate testing by listing, searching, retrieving content, and managing messages across multiple simulated servers. Use this MCP to instantly validate email delivery metrics and audit communication flows without ever touching a dashboard.

Mailosaur MCP is compatible with Claude Claude
Mailosaur MCP is compatible with ChatGPT ChatGPT
Mailosaur MCP is compatible with Cursor Cursor
Mailosaur MCP is compatible with Gemini Gemini
Mailosaur MCP is compatible with Windsurf Windsurf
Mailosaur MCP is compatible with VS Code VS Code
Mailosaur MCP is compatible with JetBrains JetBrains
Mailosaur MCP is compatible with Vercel Vercel
See Vinkius in Action

Give Claude and any AI agent real-world access

Discover available test servers

Lists all the virtual inboxes you own so you know which environments to check.

Set up new isolated test accounts

Creates a brand-new, clean virtual server/inbox for testing without affecting your live data.

Check all messages in an inbox

Retrieves a complete list of every email and SMS message received by a specific test account.

Find messages using detailed criteria

Searches through thousands of messages, finding exactly what you need by sender, recipient, or subject line.

Extract full message content

Gets the complete HTML and plain text body for any single message so your agent can analyze its specific contents.

Manage inbox clutter

Clears all messages from a server, or deletes individual messages permanently when testing is finished.

Waiting for input…

AI Agent
Mailosaur

What AI agents can do with Mailosaur: 8 Tools for Inbox Management

These tools let your AI client perform everything from creating new test environments to finding specific messages by sender or subject.

Make your AI actually useful.

Add this MCP to Claude, Cursor, or Windsurf and your AI stops guessing. It gets real tools to look things up, take action, and handle the stuff you keep doing by hand.

Start using Mailosaur MCP

Create Virtual Server

Creates a new, isolated virtual server or test inbox for dedicated testing periods.

Clear Server Inbox

Deletes every single message from an entire configured test server.

Delete Specific Message

Permanently removes one specific, undesirable message from a virtual inbox.

Get Message Content

Retrieves the full HTML and plain text content of any given test message for deep...

Get Server Details

Fetches specific information about a particular virtual server, such as its unique...

List Server Messages

Lists every message currently residing in a specified virtual server inbox.

Search Server Messages

Searches for specific messages by requiring detailed criteria like the sender, recipient, or subject line.

List Virtual Servers

Returns a list of all available virtual servers associated with your account ID.

Security and governance baked right in.

Pick your AI client below to get set up. Just create a Vinkius account, subscribe, and you're instantly up and running. We handle the entire backend infrastructure, delivering out-of-the-box support for HTTPS Streamable, SSE, and OAuth2—zero messy routing required.

Mailosaur MCP is compatible with Claude

Claude AI

1

Open Claude Settings

Go to claude.ai, click your profile icon, then navigate to Customize → Connectors.

2

Add Custom Connector

Click the "+" button and select Add custom connector. Paste your Vinkius endpoint URL:

https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. For OAuth-protected servers, expand Advanced settings to add credentials.

3

Start a conversation

Open a new chat. The Mailosaur integration is available immediately — no restart needed.

Choose How to Get Started

Build a custom MCP for your own tools, or connect a ready-made integration from our catalog.

Build Your Own

Turn any API into an MCP. Import a spec, define Agent Skills, or deploy with MCPFusion.

  • Import from OpenAPI, Swagger, or YAML specs
  • Create Agent Skills with progressive disclosure
  • Deploy to edge with MCPFusion framework
  • Built in DLP, auth, and compliance on each call
  • Real time usage dashboard and cost metering
  • Publish to catalog or keep private
Start building

Make Your AI Do More

Start with Mailosaur, then connect any of our 5,200+ other servers whenever your AI needs more. One click, no limits.

  • Use this MCP plus 5,200+ others, all in one place
  • Add new capabilities to your AI anytime you want
  • Connections are secured and governed automatically
  • Track usage and costs across all your servers
  • Works with Claude, ChatGPT, Cursor, and more
  • New servers added to the catalog weekly
Mailosaur MCP server cover

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Mailosaur. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

VINKIUS CLOUD

Cloud Hosted

Managed infra

V8 Isolated

Sandboxed per request

Zero-Trust Proxy

No stored credentials

DLP Enforced

Policy on each call

GDPR Compliant

EU data residency

Token Compression

~60% cost reduction

Your data is protected. See how we built it.

Checking delivery status shouldn't feel like detective work.

Today, checking if a critical message—like a password reset link or an order confirmation—actually made it through requires a lot of manual steps. You have to log into the email testing platform, find the correct virtual inbox domain, scroll through dozens of messages, and then copy-paste specific details (sender, subject, body text) into your debugging sheet.

With this MCP, you simply tell your agent what you're looking for. Instead of clicking through pages, your AI client executes a focused search using the tool’s criteria. You get instant results: a clean list of only the messages that matter, ready for immediate analysis.

Mailosaur MCP gives you full message lifecycle control.

The biggest time sinks disappear immediately. You stop having to manually check server domains; you just call `list_virtual_servers`. You eliminate the need to track down specific messages by hand, replacing it with a single prompt that executes a powerful search using criteria like sentTo or subject.

It’s simple: your agent manages the entire message lifecycle for testing. It can find the data, inspect the content, and when you're done, it clears the inbox completely. You move from hours of manual clicking to seconds of automated validation.

What Mailosaur MCP does for your AI

You can connect Mailosaur to your AI client and treat your test inboxes like any other data source. This lets you automate the tedious process of checking if a signup confirmation or an SMS code actually arrived, and what its content was. Instead of logging into multiple web panels, your agent reads directly from these virtual servers using simple natural language prompts.

Need to check messages sent only to a specific domain? No problem. You can also programmatically create new test environments when you need complete isolation for a fresh round of checks. When validation is done, you don't have to manually delete the evidence; just tell your agent to clear out the entire server inbox or permanently remove one bad message.

Because Vinkius hosts this MCP, your AI client can access all these testing tools from one place, making communication flow auditing simple and fast.

Built · Hosted · Managed by Vinkius Mailosaur-MCP - Test Emails & SMS with AI
Server ID 019d75cc-fc59-7297-800e-768ea48fcde3
Vinkius Inspector
Compliance Grade A+
Score 100/100
Vinkius Inspector Badge — Score 100/100

Frequently asked questions about Mailosaur MCP

How do I use Mailosaur MCP to check all my test inboxes? +

First, run list_virtual_servers to get a list of all your unique server IDs. Then, you can pass those IDs to the agent and ask it to search for messages across that entire set of servers.

Can I use Mailosaur MCP to validate SMS codes? +

Yes. The MCP treats SMS like email messages. You can use search_server_messages, specifying the expected sender or keyword in the body to find and verify those test codes.

What is the best tool for finding a message sent from a specific user? +

Use search_server_messages. This tool allows you to filter messages by detailed criteria, making it highly accurate when looking up sender or recipient addresses.

Does Mailosaur MCP allow me to create new test accounts? +

Yes. The create_virtual_server tool lets your agent programmatically build brand-new inboxes. This is critical for keeping different feature tests isolated from one another.

How do I get the full text of a message using Mailosaur MCP? +

Call get_message_content. This tool doesn't just show you the subject line; it retrieves the complete HTML and plain text body, which is necessary for deep data validation.