How do I use Mailsac with my AI client?

You subscribe to the MCP on Vinkius and enter your Mailsac API Key. Once connected, you can use any MCP-compatible client like Claude or Cursor to manage your emails.

Can my agent read the content of the emails?

Yes. Your agent can use capabilities to retrieve either the plain text body or the sanitized HTML body of any message in your inboxes.

Is searching across all addresses available?

Yes, but this specific capability requires a paid Mailsac tier to use the search capability.

Can I reserve private email addresses?

Yes. You can use the reserve capability to create specific, private addresses for your testing needs.

What happens to reserved addresses?

You can manage them by listing your reserved addresses or by using the capability to release them when they are no longer needed.

What is an 'Enhanced' address in Mailsac?

An enhanced address is a private inbox that only you can access. Use the reserve_new_address capability to make an address private/enhanced.

Can I read the raw SMTP source of an email?

While this server provides capabilities for HTML and Plain Text bodies, the Mailsac API supports raw data retrieval. You can use the text body capability to extract key technical metadata.

Is an API Key required for all addresses?

Yes, this MCP server requires an API Key to interact with your account and access your reserved resources and private messages.

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Connect Mailsac to ChatGPT, Claude and Gemini

Set it up once and it works in ChatGPT, Claude, Cursor, and any other client you love. It all runs safely in the background, so you can relax and focus on what really matters. Let your AI agent handle disposable inboxes and verification codes.

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

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Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

Your AI does the work. We keep it safe and sound.

No other AI tool gives you this. Your workflow runs in the client you already love, your account stays protected, and you decide what the agent can and cannot do. It is the whole reason to make the switch.

Each Connector lives inside our infrastructure, the same place where your workflow runs. The three things below are already part of it, working quietly in the background so you never have to think about them. Nothing to add, nothing to set up, nothing to worry about.

V8 Isolate01

Each Connector runs inside its own sealed environment.

Each Connector runs inside its own sealed V8 runtime — no access to your files, your system, or other servers. A Connector never sees past its own request.

Kill Switch02

One switch stops every agent. Instantly.

One action deactivates every Connector, revokes every token, and ends every session at once. AI Governance keeps the record.

FinOps per User03

Spending limits that pause instead of surprise.

Every user keeps their own connections and credentials, isolated from everyone else. Anything that would cross your spending limit is held for your approval, not billed.

Three controls, built into the layer your AI connects through.

Curated set · 9 capabilities

We ship only the actions that matter.

Capability set01 / 03

01-03

3 capabilities in this set.

Part of 9 available through Mailsac.

01
List reserved addresses
This capability shows you all the private, enhanced email addresses you have currently reserved.
02
Delete inbox message
Use this to permanently remove a specific message from an inbox.
03
Get plain text body
This capability retrieves the raw plain text content from a specific email message.

Capability set02 / 03

04-06

3 capabilities in this set.

Part of 9 available through Mailsac.

04
Reserve new address
This capability allows your agent to claim a specific, private email address for isolated testing.
05
Search account messages
This capability searches across all your addresses for specific messages using parameters like subject or sender (requires a paid Mailsac tier).
06
Get HTML message body
This capability pulls the sanitized HTML content from a message so your agent can parse links or layout.

Capability set03 / 03

07-09

3 capabilities in this set.

Part of 9 available through Mailsac.

07
List custom domains
This capability provides a list of all custom domains you have linked to your Mailsac account.
08
List inbox messages
This capability fetches a list of all messages currently sitting in a specific inbox.
09
Release reserved address
Use this to delete and release a previously reserved email address.

Real work

What teams actually run

Automated Sign-up Testing

Your agent reserves an address, triggers a sign-up, and reads the verification code from the resulting email.

Email Content Parsing

The agent pulls HTML bodies to extract specific links or data from incoming notifications.

Disposable Inbox Management

You use the agent to quickly create and then release temporary addresses as needed.

Bulk Inbox Cleanup

Your agent clears out old test messages to keep your Mailsac account organized.

Automate a task

Put Mailsac to work on one thing.

Step-by-step automations your AI runs through this Connector: the workflow, the prompts to start with, and the exact capabilities behind each move.

One connector, every AI

Mailsac works with the most popular AI clients.

These are the most popular clients, each with a step-by-step guide: one link, set up once, with governance and visibility built in. And because everything runs on the MCP standard, the same connection also works in any other compatible client — nothing to rebuild.

Building your own app? The connector is yours to use.

You don't need a client to put Mailsac to work: the same hosted connection plugs into your own applications and agent code, with the same governance on every request. Build with it, chat with it — one connection for both.

Observed, not estimated

937ms average. Fast in production.

Mailsac is checked daily against the live service.

Daily averagePeak 1127ms

Oct 3Today

Fastest day: 796ms
Slowest day: 1127ms
14-day trend: Slowing+9%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 9 capabilities arrive ready to run.

Preview access · not provider authentication

The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of Mailsac, so you can see the experience inside your AI.

It does not authenticate your account with Mailsac. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

Mailsac Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_bmGU0B3mzhr77Bq8AeBVT3IIEbjEAHxufRNhHlOM/mcp

Claude Desktop

Follow the steps below to connect in seconds.

1In Claude Desktop, open Settings → Connectors.
2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
3Click Add and start a new chat — Mailsac capabilities are ready to use.

Configuration · claude_desktop_config.jsonCopy

{
  "mcpServers": {
    "mailsac-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_bmGU0B3mzhr77Bq8AeBVT3IIEbjEAHxufRNhHlOM/mcp"
    }
  }
}

Claude
ChatGPT
Cursor
VS Code
Windsurf
Claude Code
JetBrains
Cline

Step-by-step instructions for each client are in the guide. How to connect

Guided setup for Claude? Set up Mailsac in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work Mailsac owners hand off.

This MCP is built for technical users who need to automate email-dependent workflows.

01
QA Engineers
They hand off the task of extracting verification codes from test emails to their agent.
02
Developers
They use the agent to inspect incoming test mail and manage temporary addresses inside their IDE.
03
Privacy-Conscious Users
They use natural language to manage temporary communication channels.

FAQ

Questions Mailsac owners ask.

01
How do I use Mailsac with my AI client?
You subscribe to the MCP on Vinkius and enter your Mailsac API Key. Once connected, you can use any MCP-compatible client like Claude or Cursor to manage your emails.
02
Can my agent read the content of the emails?
Yes. Your agent can use capabilities to retrieve either the plain text body or the sanitized HTML body of any message in your inboxes.
03
Is searching across all addresses available?
Yes, but this specific capability requires a paid Mailsac tier to use the search capability.
04
Can I reserve private email addresses?
Yes. You can use the reserve capability to create specific, private addresses for your testing needs.
05
What happens to reserved addresses?
You can manage them by listing your reserved addresses or by using the capability to release them when they are no longer needed.
06
What is an 'Enhanced' address in Mailsac?
An enhanced address is a private inbox that only you can access. Use the reserve_new_address capability to make an address private/enhanced.
07
Can I read the raw SMTP source of an email?
While this server provides capabilities for HTML and Plain Text bodies, the Mailsac API supports raw data retrieval. You can use the text body capability to extract key technical metadata.
08
Is an API Key required for all addresses?
Yes, this MCP server requires an API Key to interact with your account and access your reserved resources and private messages.

Explore

More in Developer Tools

Connect Mailsac to Claude, Cursor, ChatGPT & more

Your AI does the work. We keep it safe and sound.

Each Connector runs inside its own sealed environment.

One switch stops every agent. Instantly.

Spending limits that pause instead of surprise.

We ship only the actions that matter.

01-03

List reserved addresses

Delete inbox message

Get plain text body

04-06

Reserve new address

Search account messages

Get HTML message body

07-09

List custom domains

List inbox messages

Release reserved address

What teams actually run

Automated Sign-up Testing

Email Content Parsing

Disposable Inbox Management

Bulk Inbox Cleanup

Building your own app? The connector is yours to use.

Mailsac Connector

Claude Desktop

QA Engineers

Developers

Privacy-Conscious Users

How do I use Mailsac with my AI client?

Can my agent read the content of the emails?

Is searching across all addresses available?

Can I reserve private email addresses?

What happens to reserved addresses?

What is an 'Enhanced' address in Mailsac?

Can I read the raw SMTP source of an email?

Is an API Key required for all addresses?

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