Wren Pre-sign Check

Overview

Wren Pre-sign Check is an MCP server that validates transactions, EIP-712 payloads, text, and Base tokens before your agent signs them. It operates on a pay-per-call model through x402, giving you control over what gets approved before commitment. By exposing these checks as MCP tools, your AI assistant can audit and validate signing requests directly without manual verification steps.

The server runs as a remote endpoint at https://wren-presign-check.wrenonbase.workers.dev/mcp with no authentication required and no local installation needed. Version v1.4.0 is the current release, and you can connect any MCP-compatible client immediately.

Wren Pre-sign Check is categorized under AI & Agents on mcp.site. It works with MCP clients including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, and Zed. If you maintain this server, claim your listing to verify ownership, earn a Verified badge, and keep information up to date.

Installation

Settings → Connectors → Add custom connector
Name: Wren Pre-sign Check
URL:  https://wren-presign-check.wrenonbase.workers.dev/mcp