ChainK9 MCP server
Token risk checks for AI agents on BNB Smart Chain, Ethereum and Base.
Most token scanners read flags from someone else's API. ChainK9 does what a buyer would: it forks the chain and really buys and sells the token through its market (PancakeSwap or Uniswap V2, V3 or V4, hooks included), then runs 60+ checks. A honeypot is caught by what it does, not by what its code looks like.
Each successful call is paid automatically in USDC on Base with the x402 protocol, from a wallet you choose. There is no account and no API key, and failed calls (bad input, not a token, no liquidity, engine busy) are free.
Tools
The tool list is read live from api.chaink9.com, so new products appear without updating this package.
| Tool | Price | What it does |
|---|---|---|
scan |
$0.02 | Full check of a token: honeypot, buy/sell taxes and how they change, owner pause, blacklist, mint and confiscation powers, limits, liquidity, upgrade authority. Verdict: danger, caution or ok. |
scan-lite |
$0.005 | Faster check for bots (2–5 s): one real buy and sell plus the contract reads. Skips the extra trade and time-travel probes. |
scan-ultra |
$0.05 | Everything in scan, plus who holds the token: top holder and top-10 share, and whether one wallet can pull the liquidity. |
report |
$0.002 | The latest stored scan of a token, without a new one. |
feed |
$0.002 | Tokens that just got a market, with a verdict where scanned. |
simulate-trade |
$0.02 | Buy or sell for a given wallet on a fork, with its real balances. |
exit-check |
$0.04 | Test up to four sell sizes from a wallet's real balance. |
transaction-preview |
$0.02 | Run any transaction on a fork and see balance changes. |
liquidity-report |
$0.003 | The token's pool: reserves and LP tokens (V2), or liquidity and price (V3/V4). |
launch-feed |
$0.003 | New markets that are actually funded, optionally by verdict. |
risk-changes |
$0.002 | What changed between a token's last two scans. |
deployer-report |
$0.005 | A token's verified creator and their other known tokens. |
portfolio-screen |
$0.005 | A wallet's balances of given tokens, riskiest first. |
Every tool takes chain: bsc (default), eth or base.
Setup
- Make a new wallet just for this and put a few dollars of USDC on Base in it. It needs no ETH: x402 payments are signatures, and the payment service pays the gas.
- Add the server to your MCP client with that wallet's private key.
Claude Code:
claude mcp add chaink9 -e CHAINK9_PRIVATE_KEY=0x... -- npx -y chaink9-mcp
Cursor, Claude Desktop or any client with a JSON config:
{
"mcpServers": {
"chaink9": {
"command": "npx",
"args": ["-y", "chaink9-mcp"],
"env": { "CHAINK9_PRIVATE_KEY": "0x..." }
}
}
}
Claude Desktop can also install the .mcpb bundle from the
releases with a click.
Hosted server, no install
https://api.chaink9.com/mcp serves the same tools over streamable HTTP, plus a free
verdict tool (the stored verdict and which checks flagged it). Paid tools there take the
payment inside the MCP call, x402-style, so they need an x402-aware client such as
@x402/mcp's createx402MCPClient. Ordinary MCP
clients can connect and use verdict; to pay from those, use the package above.
Limits
| Variable | Default | Meaning |
|---|---|---|
CHAINK9_PRIVATE_KEY |
(required) | Private key of the dedicated Base wallet that pays. |
CHAINK9_MAX_USD_PER_CALL |
0.05 |
Any single payment above this is refused. |
CHAINK9_MAX_USD_PER_DAY |
1 |
Stops paying once this much was spent today (UTC). |
The daily total is kept in ~/.chaink9-mcp/spend.json. The wallet only ever signs payments
on Base, and the key never leaves your machine.
Disclaimer
ChainK9 reports what happened when it traded the token on a private copy of its blockchain at the block shown. That is evidence, not a guarantee: a token's owner can change its rules after the scan, and traps no check tests can be missed. Nothing here is financial advice; you trade at your own risk.