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HonkIO

Official registry Productivity

Canadian SMS and email API for AI agents: send SMS and email, verify phones, handle CASL consent.

Source code Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http honkio 'https://mcp.honkio.ca/mcp' --header 'Authorization: <Bearer followed by your HonkIO API key (mk_test_... or mk_live_...)>' --header 'X-HonkIO-Read-Inbox: <Set to 1 to register the two received-email read tools for this connection. Off by default: a received email is text a stranger wrote.>'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "honkio": {
            "type": "http",
            "url": "https://mcp.honkio.ca/mcp",
            "headers": {
                "Authorization": "<Bearer followed by your HonkIO API key (mk_test_... or mk_live_...)>",
                "X-HonkIO-Read-Inbox": "<Set to 1 to register the two received-email read tools for this connection. Off by default: a received email is text a stranger wrote.>"
            }
        }
    }
}
NPM package @honkio/mcp
Claude Code 
claude mcp add honkio -e 'HONKIO_API_KEY=<your honkio_api_key>' -e 'HONKIO_MCP_READ_INBOX=<HONKIO_MCP_READ_INBOX>' -- npx -y @honkio/mcp@1.13.1
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "honkio": {
            "command": "npx",
            "args": [
                "-y",
                "@honkio/mcp@1.13.1"
            ],
            "env": {
                "HONKIO_API_KEY": "<your honkio_api_key>",
                "HONKIO_MCP_READ_INBOX": "<HONKIO_MCP_READ_INBOX>"
            }
        }
    }
}

Environment variables

  • HONKIO_API_KEY required secret Your HonkIO API key (mk_test_... to explore for free, mk_live_... for real sends)
  • HONKIO_MCP_READ_INBOX Set to 1 to register the two received-email read tools. Off by default: a received email is text a stranger wrote, and the agent can also send.

Frequently asked questions

What is HonkIO?

Canadian SMS and email API for AI agents: send SMS and email, verify phones, handle CASL consent.

How do I install HonkIO?

It runs as a remote server. In Claude Code: claude mcp add --transport http honkio 'https://mcp.honkio.ca/mcp' --header 'Authorization: <Bearer followed by your HonkIO API key (mk_test_... or mk_live_...)>' --header 'X-HonkIO-Read-Inbox: <Set to 1 to register the two received-email read tools for this connection. Off by default: a received email is text a stranger wrote.>'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does HonkIO need an API key?

Yes. It expects HONKIO_API_KEY, Authorization, X-HonkIO-Read-Inbox, which you set in its configuration.

Is HonkIO open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains HonkIO?

It is published by jeffcaldwellca. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.