Wren Pre-sign Check
Wren Pre-sign Check is a pay-per-call x402 API that an AI agent calls before it signs anything with its wallet. Send a transaction (to + data), an EIP-712 typed-data payload or untrusted text, and it returns block, review or allow, the decoded call in plain words and every finding: unlimited approvals, Permit and Permit2 signatures, setApprovalForAll, EIP-7702 delegation, contract deployment and injected instructions. With an optional wren-guard policy (allowlist, spenders, caps) it also blocks unknown recipients, over-cap amounts and lookalike addresses. It is a static check and stores nothing you send; free demos show real output.
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About Wren Pre-sign Check
Wren Pre-sign Check is listed in our security & governance category and is aimed at builders. Wren Pre-sign Check is a pay-per-call x402 API that an AI agent calls before it signs anything with its wallet. Send a transaction (to + data), an EIP-712 typed-data payload or untrusted text, and it returns block, review or allow, the decoded call in plain words and every finding: unlimited approvals, Permit and Permit2 signatures, setApprovalForAll, EIP-7702 delegation, contract deployment and injected instructions. With an optional wren-guard policy (allowlist, spenders, caps) it also blocks unknown recipients, over-cap amounts and lookalike addresses. It is a static check and stores nothing you send; free demos show real output. Pricing, as the maker states it: Paid: $0.01 in USDC on Base per check over x402 (EIP-3009 payment authorisation, no approvals); free demo endpoints with fixed examples. Maturity: Active. We last checked the official link on 2026-10-21.
Wren Pre-sign Check at a glance
- Category: Security & governance
- Built for: Developers and teams building with AI agents
- Pricing: Paid: $0.01 in USDC on Base per check over x402 (EIP-3009 payment authorisation, no approvals); free demo endpoints with fixed examples (as the maker states it)
- Official site: wren-presign-check.wrenonbase.workers.dev
- Listed on AgentScout: Oct 21, 2026
Wren Pre-sign Check FAQ
What is Wren Pre-sign Check?
Wren Pre-sign Check is a pay-per-call x402 API that an AI agent calls before it signs anything with its wallet. Send a transaction (to + data), an EIP-712 typed-data payload or untrusted text, and it returns block, review or allow, the decoded call in plain words and every finding: unlimited approvals, Permit and Permit2 signatures, setApprovalForAll, EIP-7702 delegation, contract deployment and injected instructions. With an optional wren-guard policy (allowlist, spenders, caps) it also blocks unknown recipients, over-cap amounts and lookalike addresses. It is a static check and stores nothing you send; free demos show real output.
How much does Wren Pre-sign Check cost?
Wren Pre-sign Check's pricing, as the maker states it: Paid: $0.01 in USDC on Base per check over x402 (EIP-3009 payment authorisation, no approvals); free demo endpoints with fixed examples. Check the official site for current plans.
What are alternatives to Wren Pre-sign Check?
Similar tools include HOL Guard, wren-guard Pro, Is My Agent Safe, ThinkWatch Lite, Superagent and ADR.
Facts from our link-checked listing and the official site. See something wrong? Suggest an edit.
Wren Pre-sign Check ratings and reviews
Wren Pre-sign Check alternatives
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Is My Agent Safe
Is My Agent Safe checks your OpenClaw version and security audit output in plain English, showing which published security fixes you are missing and which breaking changes lie before the latest release; free check, full report $29 one-off.
ThinkWatch Lite
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