Email Preflight

io.github.tasuyoapp-ctrlv0.2.0Updated Oct 1, 2026

Email preflight x402: $0.001 USDC on Base. MCP returns unpaid 402 only; no signing or payment.

VerifiedStreamable HTTPWeb executableFinanceCommunication & Collaboration

Overview

AI-generated overview

A remote MCP endpoint that returns an unpaid 402 response for an email preflight check priced at $0.001 USDC on Base.

What it does
The registry description states that this server performs an email preflight check and that the MCP returns an unpaid 402 only, with no signing or payment performed. The manifest lists no tools, so the exact tool surface is not documented. It runs as a remote streamable HTTP endpoint at a hosted address.
When to use it
Only relevant if you are evaluating or testing an x402-style paid endpoint that quotes a price and returns an unpaid 402 response. It is not a general-purpose email validation service, since the description says it does not complete payment or signing.
Requirements
A remote MCP client that can connect to a streamable HTTP endpoint. No packages, environment variables, headers, or authentication are declared in the manifest. Network access to the hosted endpoint is required.
Before you install
The description mentions a price of $0.001 USDC on Base, so any real use would involve a cryptocurrency payment on that network. The description also says the MCP returns an unpaid 402 only and does no signing or payment, so it should not be relied on to complete a paid transaction. No tools, credentials, or data handling are documented.

Installation

In SourceWeft

  1. Open Email Preflight in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "email-preflight": {
      "type": "http",
      "url": "https://email-preflight-mcp.onrender.com/mcp"
    }
  }
}

Tools

0
Tool metadata has not been indexed yet.

Version history

1
  1. v0.2.0LatestOct 1, 2026