Check before you sign: tx and signature safety
io.github.CyberPunk11147Published by GitHub account CyberPunk11147v1.6.0Updated Nov 6, 2026
See what a transaction or signature will do before your agent signs it, plus address and link risk.
The publisher's own server: check.tattoo: tattoo size and placement guide
Overview
Lets an assistant preview what a crypto transaction or signature will do, and check address and link risk, before anything is signed.
- What you can do
- Preview a transaction or signature to see what it will do before signing
- Check the risk of an address
- Check the risk of a link
- Surface payment invoices when the free trial runs out so the agent can pay and retry
- When to use it
- Useful when an agent handles crypto transactions or signatures and you want a safety check on the transaction, address or link before approving or signing anything.
- Requirements
- Runs as a local process on the user's machine via a container image over stdio; desktop only, not web-executable. No authentication is declared. An optional secret, CWX_X_PAYMENT, can supply an x402 X-PAYMENT header; without it the server uses each service's free trial of 3 calls per day.
Installation
In SourceWeft
- Open Check before you sign: tx and signature safety in the dashboard and add it to a workspace.
- Enable the server for the chats that should use its tools.
Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.
Other MCP clients
Follow the launch instructions in the repository.
README
This repository has no README.
Tools
0Version history
6- v1.6.0LatestNov 6, 2026
- v1.5.0Oct 10, 2026
- v1.4.0Oct 9, 2026
- v1.3.0Oct 9, 2026
- v1.2.1Oct 7, 2026
- v1.1.0Sep 16, 2026
Score
35% of the applicable checks met
How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.
- Reached in the last 30 days25 pts
Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.
- Auth declared10 pts
Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.
- Tools listed15 pts
Answer tools/list without a credential, or ship a package that starts in a sandbox without one.
- DescriptionRequired15 pts
- Logo10 pts
- Documentation15 pts
Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.
- License10 pts
Other Check integrations
check.tattoo: tattoo size and placement guide
tattoo.checkOfficial publisher
check.tattoo: tattoo size and placement guide's hosted MCP server, published by check.tattoo; no sign-in required; Streamable HTTP; 5 tools.
iva.pt — EU VAT check (VIES) and Portuguese VAT law
pt.ivaOfficial publisher
Validates EU VAT numbers against VIES and returns Portuguese VAT Code (CIVA) and RITI articles, in Portuguese or English.
Zovo Charity Lookup
Published by GitHub account theluckystrike
Looks up US nonprofits by name or EIN and reports IRS status, Form 990 finances and officer pay from ProPublica Nonprofit Explorer.
Zovo Bank Insurance Check
Published by GitHub account theluckystrike
Looks up US banks in live FDIC records and estimates how much of a user's deposits are FDIC insured.
U.S. Public Company Check
Published by GitHub account JusticeUA
Remote Apify-hosted MCP server that lets an assistant look up U.S. public company checks by SEC CIK: filing status, bankruptcy 8-K flag, LEI and sanctions.