Wren Pre-sign Check

by FastDrop

MCP MCP VERIFIED Verified 2 hours ago Registry import free

Check a tx, EIP-712 payload, text or Base token before your agent signs. Paid per call over x402.

Check a tx, EIP-712 payload, text or Base token before your agent signs. Paid per call over x402. Official MCP Registry: io.github.claudeisgod/wren-presign-check@1.4.0. Remote endpoint: https://wren-presign-check.wrenonbase.workers.dev/mcp

Problem it solves

Discoverable MCP server listed in the official MCP Registry.

How it's different

Remote MCP endpoint ingested from the official registry and probed by FastDrop.

Ingested from the official MCP Registry

FastDrop pulled this entry from the official MCP Registry as io.github.claudeisgod/wren-presign-check and probed the endpoint. The maker did not submit it, so the outbound link is not endorsed and the description is not theirs.

If this is your server, claim the listing to edit it and take ownership. The registry index lists everything else still awaiting a probe.

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Tools this endpoint exposes

Read directly from the endpoint on 28 Oct 2026. Not supplied by the maker.

presign_check
Call before your agent signs anything. Send tx fields (to, data, value, chainId), or typedData (an eth_signTypedData_v4 payload), or untrusted text, with an optional wren-guard policy. Returns block,
screen_text
Call before your agent acts on untrusted text (a reply, DM, web page, tool output or memory). Returns safe, suspicious or malicious with the matched patterns, after decoding base64, hex, Morse, leetsp
token_facts
Call before your agent approves, receives or sends a Base ERC-20. Returns code size, EIP-7702 delegation, name, symbol, decimals, supply, proxy and upgrade admin, owner or renounced, and which privile
presign_demo
Free. Runs one fixed example (an unlimited approval, setApprovalForAll, a never-expiring permit, an EIP-7702 delegation, an injected memo or a normal x402 payment) through the same checker, so you can