chain-signer: a non-custodial wallet MCP server for agents (feedback on key-handling welcome)

[Kevthetech143]

I just published chain-signer to the registry (io.github.Kevthetech143/chain-signer) and would value feedback from people here, especially on the key-handling.

It gives an AI agent its own non-custodial wallet: the agent generates and holds its own key locally and signs locally — nothing routes through a custodian. From there the same library does balance, send, swap, and contract calls. It's a stdio MCP server exposing 6 tools, also usable as a plain Python library.

It's brand new — no users yet, sharing it to get honest eyes on it, not to pitch.

The part I'd point you to first is a 2-second offline check (no key of yours, no funds, no network):

pip install chain-signer
python examples/quickstart.py

That makes a wallet, signs a message, and proves the signature recovers the address — so you can sanity-check the signing layer before trusting it with anything.

MCP client config:

{ "mcpServers": { "chain-signer": { "command": "chain-signer-mcp" } } }

Repo: https://github.com/Kevthetech143/chain-signer — non-custodial by design, MIT, general-purpose agent tooling. Tear the key-handling apart, that's the feedback I want most.