Mailsac Connector for AI agents.
9 live capabilities
Automate email verification codes and manage private test inboxes.
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Why people use Mailsac
Mailsac for Automated Email Verification
With the Mailsac MCP, that entire sequence disappears. Your agent handles the API calls to fetch the message and extract the code for you. You get to stay in your IDE while the agent does the heavy lifting of interacting with the inbox.
What Vinkius changes
You get a hands-off way to handle email verification and inbox management.
Use it from Claude, ChatGPT, Cursor or another AI client you already have.
One account · 6,100+ Connectors
- Real-world use case 01
Automated QA Signup Flows
A QA engineer wants to automate a signup flow.
- Real-world use case 02
Developer Notification Checks
A developer wants to check if a password reset works.
- Real-world use case 03
Privacy-First Web Registration
A user wants to sign up for a new site without giving away their real email.
Complete set · 9capabilities
The complete Mailsac capability set.
These are the exact actions your AI can choose when you ask it to work with Mailsac.
01—03
3 capabilities in this set.
Part of 9 available through Mailsac.
- 01 Capability
List reserved addresses
Mailsac MCP lets you see all your reserved email addresses at once. It helps you keep track of your active test accounts.
- 02 Capability
Delete inbox message
Mailsac MCP lets you remove a single email from an inbox. This keeps your test environment clean and organized.
- 03 Capability
Get plain text body
Mailsac MCP lets you get the raw text from an email. It's the fastest way to grab a verification code or link.
04—06
3 capabilities in this set.
Part of 9 available through Mailsac.
- 04 Capability
List inbox messages
Mailsac MCP lets you see a list of all messages in a specific inbox. Use this to check if a mail arrived.
- 05 Capability
Release reserved address
Mailsac MCP lets you delete a reserved address when you're finished with it. This frees up your account space.
- 06 Capability
Reserve new address
Mailsac MCP lets you create a new private email address on the fly. Use it to start a fresh, isolated test flow.
07—09
3 capabilities in this set.
Part of 9 available through Mailsac.
- 07 Capability
Search account messages
Mailsac MCP lets you search for messages across all your addresses. This helps you find old data using sender or subject lines.
- 08 Capability
Get html message body
Mailsac MCP lets you pull the full HTML content of a message. This is great for parsing complex layouts or buttons.
- 09 Capability
List custom domains
Mailsac MCP lets you see all the custom domains linked to your account. Use it to check your current branding options.
Set up in minutes
One URL. Then ask Mailsac to work.
Claude and ChatGPT only need the Connector URL. Copy it once, add it in settings, and use Mailsac from the conversation.
Choose your client
Live previewAdvanced clients IDE · CLI
Claude · Web + desktop
Connector URL · ready to paste
Streamable HTTPhttps://edge.vinkius.com/vk_preview_bmGU0B3mzhr77Bq8AeBVT3IIEbjEAHxufRNhHlOM/mcp - Step 01
Open Connectors
In Claude Web or Claude Desktop, open Settings and choose Connectors.
- Step 02
Add the URL
Choose Add custom connector, name it Mailsac, and paste the URL above.
- Step 03
Turn it on in chat
Select +, open Connectors, and enable Mailsac for the conversation.
ChatGPT · Web + desktop
Connector URL · ready to paste
Streamable HTTPhttps://edge.vinkius.com/vk_preview_bmGU0B3mzhr77Bq8AeBVT3IIEbjEAHxufRNhHlOM/mcp - Step 01
Open MCP settings
On desktop, open Settings and MCP servers. On web, open your workspace app or connector settings.
- Step 02
Add the URL
Choose Add server with Streamable HTTP, or create a custom MCP app, then paste the Mailsac URL.
- Step 03
Save and start
Save the connection and enable Mailsac in your conversation. Desktop may ask you to restart once.
Cursor · IDE configuration
Advanced setup
{
"mcpServers": {
"mailsac": {
"url": "https://edge.vinkius.com/vk_preview_bmGU0B3mzhr77Bq8AeBVT3IIEbjEAHxufRNhHlOM/mcp"
}
}
}- Step 01
Open MCP Settings
Press Cmd+Shift+P (macOS) or Ctrl+Shift+P (Windows/Linux) → search "MCP Settings"
- Step 02
Add the server config
Paste the JSON configuration above into the mcp.json file that opens
- Step 03
Save the file
Cursor will automatically detect the new Connector
- Step 04
Start using Mailsac
Open Agent mode in chat and ask: "Using Mailsac, help me...". 9 tools available
VS Code Copilot · IDE configuration
Advanced setup
{
"mcpServers": {
"mailsac": {
"url": "https://edge.vinkius.com/vk_preview_bmGU0B3mzhr77Bq8AeBVT3IIEbjEAHxufRNhHlOM/mcp"
}
}
}- Step 01
Create MCP config
Create a .vscode/mcp.json file in your project root
- Step 02
Add the server config
Paste the JSON configuration above
- Step 03
Enable Agent mode
Open GitHub Copilot Chat and switch to Agent mode using the dropdown
- Step 04
Start using Mailsac
Ask Copilot: "Using Mailsac, help me...". 9 tools available
Windsurf · IDE configuration
Advanced setup
{
"mcpServers": {
"mailsac": {
"url": "https://edge.vinkius.com/vk_preview_bmGU0B3mzhr77Bq8AeBVT3IIEbjEAHxufRNhHlOM/mcp"
}
}
}- Step 01
Open MCP Settings
Go to Settings → MCP Configuration or press Cmd+Shift+P and search "MCP"
- Step 02
Add the server
Paste the JSON configuration above into mcp_config.json
- Step 03
Save and reload
Windsurf will detect the new server automatically
- Step 04
Start using Mailsac
Open Cascade and ask: "Using Mailsac, help me...". 9 tools available
Cline · IDE configuration
Advanced setup
{
"mcpServers": {
"mailsac": {
"url": "https://edge.vinkius.com/vk_preview_bmGU0B3mzhr77Bq8AeBVT3IIEbjEAHxufRNhHlOM/mcp"
}
}
}- Step 01
Open Cline MCP Settings
Click the Connectors icon in the Cline sidebar panel
- Step 02
Add remote server
Click "Add Connector" and paste the configuration above
- Step 03
Enable the server
Toggle the server switch to ON
- Step 04
Start using Mailsac
Ask Cline: "Using Mailsac, help me...". 9 tools available
Claude Code · Terminal command
Advanced setup
claude mcp add mailsac --transport http "https://edge.vinkius.com/vk_preview_bmGU0B3mzhr77Bq8AeBVT3IIEbjEAHxufRNhHlOM/mcp"- Step 01
Install Claude Code
Run npm install -g @anthropic-ai/claude-code if not already installed
- Step 02
Add the Connector
Run the command above in your terminal
- Step 03
Verify the connection
Run claude mcp to list connected servers, or type /mcp inside a session
- Step 04
Start using Mailsac
Ask Claude: "Using Mailsac, show me...". 9 tools are ready
Where the request belongs
Work Mailsac can move forward.
The QA engineer who's tired of manual verification, the developer building automated flows, and the privacy advocate who wants to keep their real identity off the web.
QA Engineer
Automating the extraction of verification codes from signup emails during regression testing.
Backend Developer
Checking if notification emails hit the correct inboxes during API integration.
Security Researcher
Managing isolated communication channels for privacy-focused testing.
Build the capability set
Add more capabilities.
Each Connector adds new actions and data without changing how you work.
Browse ConnectorsMailinator
Test email workflows with disposable inboxes that catch every message without touching production mailboxes or real addresses.
MailSlurp
Manage temporary inboxes and automate email testing via the MailSlurp REST API.
Mailosaur
Automate email and SMS testing and management via the Mailosaur REST API.
Maileroo
Deliver transactional emails reliably at scale with an SMTP relay and API that prioritizes inbox placement and speed.
Snov.io
Find business emails, verify deliverability, and run multi-step drip campaigns that fill your outbound sales pipeline.
Elastic Email
Equip your AI agent to manage email campaigns, track contacts, and monitor delivery logs via the Elastic Email API.
Bring your own AI
Change the model, client or framework. Keep Mailsac connected.
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Claude -
ChatGPT -
Gemini -
Cursor -
VS Code -
Windsurf -
ZCode -
Cline -
Zed -
Continue -
Kiro -
Roo Code -
Zencoder -
Goose -
Void -
Augment Code -
Amp -
Qodo -
Tabnine -
Pieces -
Sourcegraph Cody -
JetBrains -
Warp -
Amazon Q -
Antigravity -
BoltAI -
Raycast -
Jan -
LM Studio -
AnythingLLM -
Open WebUI -
Msty -
Cherry Studio -
LibreChat -
TypingMind -
Chorus -
5ire -
n8n -
LangChain -
LlamaIndex -
CrewAI -
Vercel AI SDK
Before you connect
Questions about Mailsac.
The practical details behind the request, access and result.
Can the Mailsac MCP help me automate verification codes?
Yes, it can. By using the plain text body capability, your agent can grab verification codes from your Mailsac inboxes automatically, which is perfect for automated signup flows.
Does Mailsac MCP work with Claude or Cursor?
It works with any MCP-compatible client, including Claude, Cursor, and Windsurf. You just need to connect your Mailsac API key in the settings.
Can I use my own custom domains with Mailsac MCP?
Yes, you can. The Connector allows your agent to see and manage the custom domains you've already linked to your Mailsac account.
Is Mailsac MCP good for QA engineers?
It's a great fit for QA. It allows you to automate the entire lifecycle of a test email, from reserving a fresh address to extracting codes and cleaning up the inbox.
Can I delete emails automatically using Mailsac MCP?
Yes, you can. You can tell your agent to remove specific messages or clear out entire inboxes to keep your test environment organized.
How do I get my Mailsac API key for this Connector?
You can find your API key in your Mailsac account settings. Once you have it, you'll enter it into your AI client to connect the Connector.
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 Connector requires an API Key to interact with your account and access your reserved resources and private messages.
One connection away
Give your agent a direct line to Mailsac.
Connect Mailsac once. Keep it beside 6,100+ managed Connectors when the next task needs more.
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