Connect mails.so to any app

mails.so is an email validation service. It checks if an address is valid, if it exists, or if it can receive mail, keeping your contact lists clean.

Connects with an API keymails.so

2 actions

What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it.

Build solutions, not workarounds.

What do you want to automate with mails.so?

Ask the assistant

Connect your AI client

Give your AI client this address.

https://mcp.apiant.ai

Any client that takes a remote MCP server. Nothing to install. Create your free account, then sign in once in your browser.

Set it up in your client

Claude Code

Run this in the directory you want to work in.

claude mcp add --transport http -s project apiant-ai https://mcp.apiant.ai

Start Claude Code there, approve the server, and sign in in the browser page it opens.

Claude Code guide

Claude, web and desktop

Open Customize, then Connectors, then Add custom connector, and paste the address. On Team and Enterprise an owner adds it first.

Setup guide

Cursor

Add the address to your MCP configuration as a server URL. Cursor signs you in in your browser.

Setup guide

Zed

Open Settings, then AI, then MCP Servers, then Add Server, then Add Remote Server.

Setup guide

Codex and the ChatGPT desktop app

Open Settings, then MCP servers, then Add server, and choose Streamable HTTP. From the terminal, Codex takes the address with its own add command and then signs you in.

Setup guide

Any other MCP client

Paste the address where the client asks for a remote MCP server URL, and name the server apiant-ai where it lets you. APIANT's skills reach the client over the same connection.

Setup guide

Popular

mails.so with the apps people pair it with most

Pair it

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What your agent can do with mails.so

Triggers and actions 2 actions

Action
Bulk validate email addresses
Submits a list of email addresses to mails.so for asynchronous bulk validation and returns the batch job.
Action
Validate Email Address
Validates a single email address and returns its deliverability result, score and the individual checks.

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What our customers say

Questions

mails.so, answered

What can your agent do in mails.so?

Any of mails.so's 2 actions, including Bulk validate email addresses and Validate Email Address. Your agent maps the data both ways and tests every scenario before it ships.

Which apps can mails.so connect to?

Any app in the catalog; the list on this page pairs mails.so with each of them. If the other app is missing, point your agent at its API documentation and it builds the connector.

What happens when something fails?

Your agent works that out for you. It plans the failure paths along with the happy path, then tests every scenario before it ships.

Is there a free plan?

Yes. Every plan includes the agent, including free, and building from your own AI client spends no assistant credits.