Token contract safety scanner -- honeypot, tax, proxy, blacklist, ownership. Rug-pull protection for agents. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

json

{
  "mcpServers": {
    "token-safety": {
      "url": "https://token-safety.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

bash

curl "https://token-safety.api.klymax402.com/api/check?address=0x0000000000000000000000000000000000dEaD"
# -> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

Tool	Method	Path	Price	Description
`token_check_safety`	GET	`/api/check`	$0.008	Check token contract safety and risk score

`token_check_safety`

Use this when you need to check if a token is safe before buying or interacting with it. Returns a comprehensive safety report in JSON.

Parameters

Name	Type	Required	Description
`address`	string	yes	Token contract address (e.g. 0x...)
`chain`	string	no	Chain to check on: 'ethereum' or 'base' (default: ethereum)

Returns

isHoneypot -- whether the token traps buyers (cannot sell)
ownershipRenounced -- whether the contract owner has renounced control
isProxy -- whether the contract is upgradeable (proxy risk)
buyTax -- percentage tax on buy transactions
sellTax -- percentage tax on sell transactions
maxTxPercent -- maximum transaction size as percent of supply
liquidityLocked -- whether liquidity is locked
hasBlacklist -- whether contract has a blacklist function
holderCount -- total number of token holders
riskScore -- overall risk score (0=safe, 100=dangerous)

Example response:

json

{"isHoneypot":false,"ownershipRenounced":true,"isProxy":false,"buyTax":0,"sellTax":0,"maxTxPercent":100,"liquidityLocked":true,"hasBlacklist":false,"holderCount":15420,"riskScore":12}

When to use: buying any new or unknown token. Essential for rug-pull protection and due diligence.

Not for: token prices (use dex_get_swap_quote), wallet balance (use wallet_get_portfolio), holder distribution (use token_get_holder_analysis).

Example agent prompts

"Check if a token is safe before buying or interacting with it"

Payment

Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
Network: Base L2 (eip155:8453)
Asset: USDC
Facilitator: Coinbase CDP (primary), PayAI (fallback)
Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)