Connect Mailboxlayer to Claude, ChatGPT, Cursor, Claude Code, Codex, Gemini, GitHub Copilot and any other MCP client, for your whole team. Metorial adds security, governance, and tracing, and gives everyone one Magic MCP URL to connect.
Ask your agent in plain language. Each of these maps to a real tool on the server.
Use the validate email tool in Mailboxlayer
Use the bulk validate emails tool in Mailboxlayer
Supported Tools
validate_email
Validate Email
Validates and verifies a single email address in real time. Performs syntax validation, MX record lookup, SMTP mailbox verification, and returns a deliverability quality score.
Also detects whether the email belongs to a **free provider** (e.g., Gmail, Yahoo), a **disposable/temporary provider** (e.g., Mailinator), or is a **role-based address** (e.g., support@, info@). If a typo is detected in the domain, a "did you mean" suggestion is provided.
bulk_validate_emails
Bulk Validate Emails
Validates and verifies multiple email addresses in a single request. Each email undergoes the same checks as single validation: syntax, MX records, SMTP verification, free/disposable/role detection, and quality scoring.
Returns an array of validation results, one per email address.
Enable Mailboxlayer in Metorial. In your Metorial portal, enable the Mailboxlayer MCP server and sign in with the account that owns the data. Access stays governed by your team policies.
Add a custom connector. Open Customize, then Connectors. Select Add, then Custom, then Web.
Paste your Metorial MCP URL. Name it Metorial, paste your Magic MCP URL (<your-magic-mcp-url>) and continue.
Sign in. Select Add and sign in to load Mailboxlayer tools.
Enable Mailboxlayer in Metorial. In your Metorial portal, enable the Mailboxlayer MCP server and sign in with the account that owns the data. Access stays governed by your team policies.
Add a custom MCP server. On ChatGPT web, open Plugins, select +, then Add custom MCP server.
Paste your Metorial MCP URL. Name it Metorial, paste your Magic MCP URL (<your-magic-mcp-url>), choose OAuth and accept the risk notice.
Create and install the plugin. Select Create as a plugin, install it and sign in to load Mailboxlayer tools.
Enable Mailboxlayer in Metorial. In your Metorial portal, enable the Mailboxlayer MCP server and sign in with the account that owns the data. Access stays governed by your team policies.
Add Metorial to your MCP config. Use ~/.cursor/mcp.json for every project, or .cursor/mcp.json for one.
Sign in. Open Customize in the sidebar, find Metorial and sign in to load Mailboxlayer tools.
{
"mcpServers":{
"metorial":{
"url":"<your-magic-mcp-url>"
}
}
}
Enable Mailboxlayer in Metorial. In your Metorial portal, enable the Mailboxlayer MCP server and sign in with the account that owns the data. Access stays governed by your team policies.
Add the server over HTTP. Add --scope user to use it in every project.
Sign in. Run /mcp, select Metorial and sign in to load Mailboxlayer tools.
claude mcp add --transport http metorial <your-magic-mcp-url>
Enable Mailboxlayer in Metorial. In your Metorial portal, enable the Mailboxlayer MCP server and sign in with the account that owns the data. Access stays governed by your team policies.
Add the server and sign in. The Codex CLI, IDE extension and ChatGPT desktop app share this config.
Check the connection. Type /mcp in Codex to see Metorial and its Mailboxlayer tools.
codex mcp add metorial --url <your-magic-mcp-url>
codex mcp login metorial
Run Mailboxlayer through the Metorial gateway
One governed layer for every app your agents reach, not a separate connector per tool.
Give Mailboxlayer and every other app to your whole team through one MCP gateway, behind your SSO.
Scope which teams and agents can use Mailboxlayer tools with role-based access control, and trace every call.
Prefer to run it yourself? Metorial is open source and self-hostable.
Validate and verify email addresses in real time. Check email syntax against RFC standards, verify existence via MX record lookup and SMTP checks, detect disposable and free email providers, identify role-based addresses, and receive a deliverability quality score. Supports single and bulk email validation, typo detection with "did you mean" suggestions, and catch-all detection.
Frequently asked questions
Common questions about connecting Mailboxlayer to AI agents with Metorial.
How many tools does the Mailboxlayer MCP server have?
The Mailboxlayer MCP server exposes 2 tools, including Validate Email, Bulk Validate Emails. Each one is governed and traced through Metorial.
Does the Mailboxlayer MCP server support triggers?
Mailboxlayer exposes tools your agents call on demand; it does not publish event triggers yet. Everything still runs through one governed MCP URL.
Which AI clients can use the Mailboxlayer MCP server?
Any MCP client, including VS Code, Windsurf, Zed, OpenCode and Grok. Each one reaches the Mailboxlayer MCP server through the same Metorial URL.
How do I give only some teams access to Mailboxlayer?
Use role-based access control to decide which teams, users, and agents can use Mailboxlayer and which of its tools they can call.
Can I self-host the Mailboxlayer MCP server?
Yes. Metorial is open source, so you can run the Mailboxlayer MCP server yourself or use the hosted gateway.
Connect Mailboxlayer to production AI agents
See how Metorial gives your team governed access to Mailboxlayer, with tracing and security controls built in.