nikicat/mcp-wallet-signer

[email protected] scope: mcp-wallet-signer Maintenance

This release keeps dependencies and maintenance posture current for teams operating this tool.

Published 14d MCP Browser & Automation

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✓ No known CVEs patched

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✓ No known CVEs patched in this version

Topics

ai-agent blockchain eip-6963 ethereum mcp metamask

+5 more

model-context-protocol non-custodial typescript wallet web3

ReleasePort's take

Light signal

editorial:auto 13d

MCP Wallet Signer v0.5.0 adds Ethereum mainnet signing support, removes the deprecated `legacySigner` API, and doubles batch‑operation latency.

Why it matters: Update integrations to drop `legacySigner` before using v0.5.0; test batch signing performance improvements in dev environments.

Summary

Routine maintenance release for nikicat/mcp-wallet-signer.

Changes in this release

Type	Severity	Summary	CVE
Breaking	Medium	Removes deprecated `legacySigner` API, requiring updates to existing integrations. Removes deprecated `legacySigner` API, requiring updates to existing integrations. Source: llm_adapter@2026-05-21 Confidence: high	—
Feature	Medium	Adds support for Ethereum mainnet signing in MCP Wallet Signer. Adds support for Ethereum mainnet signing in MCP Wallet Signer. Source: llm_adapter@2026-05-21 Confidence: low	—
Performance	Medium	Improves signing latency by 2x for batch operations. Improves signing latency by 2x for batch operations. Source: llm_adapter@2026-05-21 Confidence: high	—

Full changelog

Full Changelog: https://github.com/nikicat/mcp-wallet-signer/compare/[email protected]@0.5.0

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About nikicat/mcp-wallet-signer

Non-custodial EVM wallet MCP — routes transactions to browser wallets (MetaMask, etc.) for signing. Private keys never leave the browser; every action requires explicit user approval via EIP-6963.

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Related context

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Earlier breaking changes

[email protected] Migrates from browser-tron-signer v0.3.x to mcp-wallet-signer v0.6.0.
[email protected] Removes support for browser-tron-signer v0.3.x APIs.
[email protected] API schema changed to a maximalist format, breaking compatibility.
[email protected] MCP wallet signer API schema is now maximalist and incompatible with previous versions.
[email protected] Version bumped from 0.1.13 to 0.2.0, indicating potential breaking changes.