Falcon Shield

io.github.ygfalconPublished by GitHub account ygfalconv1.0.0Updated Oct 30, 2026

Pre-sign Solana tx guard for agents: ALLOW/WARN/BLOCK verdict, x402 USDC pay-per-call.

The publisher's own server: Frontier Reference

VerifiedStreamable HTTPWeb executable

Overview

Falcon Shield's hosted MCP server (falcon-shield.falcon-sol.workers.dev); no sign-in required; Streamable HTTP; 1 tool.

No AI overview yet: these facts come from the registry entry and the server itself.

Endpoint
falcon-shield.falcon-sol.workers.dev
Last checked

Installation

In SourceWeft

  1. Open Falcon Shield 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.ygfalcon%2Ffalcon-shield/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": {
    "falcon-shield": {
      "type": "http",
      "url": "https://falcon-shield.falcon-sol.workers.dev/mcp"
    }
  }
}

Tools

1

shield_guard_check

Falcon Shield: check a Solana tx before signing

Use this before an agent or wallet signs a Solana transaction. Decodes the unsigned or signed transaction and returns NO_MATCH (no known-bad pattern matched; not a safety guarantee), WARN, or BLOCK, with plain-language reasons and a signed receipt. Pass an x402 quote to also check a payment transaction against it (overpay, approve-instead-of-transfer, unchecked Transfer, wrong payee). Errors return ERROR and are never charged. Price $0.009 USDC (x402, Solana).

Parameterstxrequiredcapsquotestrictwalletsimulatecap_base_unitsknown_addresses

Version history

1
  1. v1.0.0LatestOct 30, 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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