QAmcp

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Directory / Chain Check (x402)

Chain Check (x402)

Q: Is Chain Check (x402) MCP server safe?

QAmcp's test on 2 Nov 2026: None of the hidden-instruction wordings we know were found in its tool descriptions. 0 of its 6 tools are labeled read-only; the others may change or send things. Overall it scored 77/100 on 2 Nov 2026. A test can only see what the server shows from outside, not what it does with your data behind the scenes. Connect servers from makers you trust.

by chaincheck-api.netlify.app · https://chaincheck-api.netlify.app/mcp

x402-paid on-chain tools: wallet report, contract scan, token risk, gas, address labels (USDC/Base)

6 tools✓ no account neededPricing: not listed

Visit website

77 /100

PASS · WITH NOTES

Partial: 8 of 11 checks · 2 Nov 2026

Is Chain Check (x402) MCP server safe?

None of the hidden-instruction wordings we know were found in its tool descriptions.
0 of its 6 tools are labeled read-only; the others may change or send things.
Overall it scored 77/100 on 2 Nov 2026.

A test can only see what the server shows from outside, not what it does with your data behind the scenes. Connect servers from makers you trust.

What it can do

6 tools, in the server's own words.

wallet_report

Multi-chain EVM wallet report (7 chains): native/USDC/USDT balances, tx counts, contract + EIP-7702 detection.

contract_scan

Smart-contract risk scan: proxy/admin, owner, mint, blacklist, pause, fee-change, trading toggle flags.

token_risk

ERC-20 token risk score 0-100 (honeypot, taxes, mint, hidden owner, blacklist, LP lock, top holders).

gas_snapshot

Live gas on 7 EVM chains with USD cost of transfer/swap and cheapest chain.

address_label

ENS address resolution and malicious-address flags (phishing, scam, sanctions, mixer).

pricing

Free.

Test results

Safe mode: only tools labeled read-only were run. How the test works

!
Ready for the newest MCP version
1 warning
- !Uses an older MCP version (2025-11-25). It works today, but it isn't on the July 2026 version (2026-07-28) yet.
note
!
Every tool is described
3 warnings
- !wallet_report: Inputs with no description: address
- !contract_scan: Inputs with no description: address
- !token_risk: Inputs with no description: address
note
!
Tools are labeled safe or dangerous
1 warning
- !6 of 6 tools have no safety label (read-only or dangerous): wallet_report, contract_scan, token_risk, gas_snapshot, address_label, pricing
note
!
Follows MCP best practices (not scored yet)
2 tips (not scored)
- !6 tools not labeled read-only don't say whether running them twice is safe (idempotentHint): wallet_report, contract_scan, token_risk, gas_snapshot, address_label, pricing
- !6 tools don't say whether they reach outside services like the web (openWorldHint): wallet_report, contract_scan, token_risk, gas_snapshot, address_label, pricing
note
✓
ConnectsConnected in 478 ms
pass
✓
Lists its toolsFound 6 tools
pass
✓
No known hidden instructionsNone of the hidden-instruction wordings we know were found in tool descriptions. New wordings can get past this check.
pass
✓
Fast enough
All good
- ✓Connecting took 478 ms
- ✓Listing tools took 113 ms
pass
–
Tools work with good inputs
Not tested
- –wallet_report: Not run: no safety label (if you own this server, test again in owner mode)
- –contract_scan: Not run: no safety label (if you own this server, test again in owner mode)
- –token_risk: Not run: no safety label (if you own this server, test again in owner mode)
- –gas_snapshot: Not run: no safety label (if you own this server, test again in owner mode)
- –address_label: Not run: no safety label (if you own this server, test again in owner mode)
- –pricing: Not run: no safety label (if you own this server, test again in owner mode)
not tested
–
Bad inputs give a clean errorNot tested
not tested
–
Tools work togetherNo safe tool returned data to start a chain from, so chains were not tested (not counted either way)
not tested
–
No secrets leakedNo error messages to check
not tested

Test it yourself

Free and open source. Same checks, same score.

npx qamcp-cli https://chaincheck-api.netlify.app/mcp

Show this score on GitHub

Free for every server in the directory. Paste this into your README: the badge shows the score from our latest test.

[![QAmcp score](https://qamcp.dev/s/app-netlify-chaincheck-api-chaincheck.svg)](https://qamcp.dev/s/app-netlify-chaincheck-api-chaincheck.html)

Score over time

2 Nov 202677

One test so far. New tests will show here.

Reviews

Coming soon: reviews from people who use Chain Check (x402), signed in with GitHub, one per person. Reviews never change the score.

Is this your server? Get an alert the moment it breaks.

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