nikicat/mcp-wallet-signer

v0.2.0 Breaking

This release includes breaking changes for platform teams planning a safe upgrade.

Published 3mo 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

Summary

AI summary

New programmatic WalletSigner class with Viem integration and modular refactoring.

Full changelog

What's New

WalletSigner Programmatic Module API

New WalletSigner class for programmatic use as a library (src/mod.ts)
Schemas extracted to dedicated src/schemas.ts for reuse
Pending store and HTTP server refactored for modularity

Viem Integration

Custom viem transport (src/transport.ts) — route JSON-RPC calls through WalletSigner
Viem account adapter (src/viem-account.ts) — use WalletSigner as a viem Account
Lightweight wallet-only export (src/wallet-only.ts) for minimal bundles

Other

MCP server simplified (~300 lines removed) by delegating to WalletSigner
New test suites for transport and wallet-signer modules
Version bumped to 0.2.0

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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

Related tools

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] Removes deprecated `legacySigner` API, requiring updates to existing integrations.