Sato Check · MCP server

x402node-mcp

mcp:npm:x402node-mcp · v1.0.4 · sha256:c265a64b0519 · as of 2026-09-28

Does it take your key?: Yes — it reads private-key material. Local signing is what a wallet does; question 2 says whether the key leaves.; Our static read of the published artifact found it.
Does your key leave?: Not yet run — we have not run this version with planted test keys.; No evidence line on file for this question yet.
Can it move funds on its own?: Unknown — we could not read what it exposes.; No evidence line on file for this question yet.
What changed?: First profile of this subject — nothing to compare yet.; No evidence line on file for this question yet.

Hosts contacted

Host	When	Role	Evidence
api.cdp.coinbase.com	code	other	traced
mainnet.base.org	code	rpc	traced

Evidence (6 lines)

tracedT-key-read2026-09-28
Reads process.env.X402_PRIVATE_KEY.
mcp-server.js:12
tracedT-key-read2026-09-28
Reads privateKeyToAccount() on a value read from key material (PRIVATE_KEY).
mcp-server.js:24
tracedT-hosts2026-09-28
api.cdp.coinbase.com appears in shipped code (other).
mcp-server.js
tracedT-hosts2026-09-28
mainnet.base.org appears in shipped code (rpc).
mcp-server.js
tracedT-key-named2026-09-28
The shipped code names X402_PRIVATE_KEY in a message to the user.
mcp-server.js
declaredD-env-key2026-09-28
Setup names X402_PRIVATE_KEY as something to provide.
deploy_spec.requires

The observed lane has not run on this version: not yet run on this version
Traced analysis follows flows inside one module only; a key handed from one module to another is not followed.
The observed lane has not run on this version.
No tool inventory was available, so fund actions were not read.

A profile describes what we read and ran, with dates. It is not a safety rating, an audit or an endorsement, and "not found" is not "not there".

sato.custody/v1 · custody-1

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