Preflight SafeSwap

io.github.mr8-gifPublished by GitHub account mr8-gifv1.0.0Updated Oct 24, 2026

Safe Solana swaps for AI agents with risk checks, unsigned transactions, x402, and 3-bp fees.

The publisher's own server: Preflight

VerifiedStreamable HTTPWeb executableFinanceSecurity & Monitoring

Overview

AI-generated overview

A remote read-only firewall that checks an unsigned Solana transaction's simulated effects against declared intent and policy, returning PASS, FAIL or REVIEW.

What you can do
Compare an unsigned Solana transaction's simulated effects with the declared intent and principal policy, returning PASS, FAIL or REVIEW plus a signed verification receipt.
When to use it
Use it when an assistant prepares Solana swaps or other financial actions and you want an independent pre-signing check that the transaction does what was intended before anything is signed.
Requirements
A remote streamable HTTP endpoint; no packages, environment variables or headers are declared. Network access to the hosted endpoint is needed.
Before you install
It is described as read-only and returns unsigned transactions, so signing stays with you. The description mentions x402 and a 3-bp fee, which may involve payments; confirm costs and what transaction data is sent to the hosted service before relying on it.

Installation

In SourceWeft

  1. Open Preflight SafeSwap 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.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.mr8-gif%2Fpreflight-safe-swap/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "preflight-safeswap": {
      "type": "http",
      "url": "https://preflight-agent.netlify.app/mcp"
    }
  }
}

Tools

1

preflight_transaction

Read-only Solana financial-action firewall. Compare an unsigned transaction's simulated effects with declared intent and principal policy. Returns PASS, FAIL, or REVIEW plus a signed verification receipt.

ParametersintentrequiredpolicyrequiredunsignedTransactionrequired

Version history

1
  1. v1.0.0LatestSep 16, 2026

Score

83% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.

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