This tool is no longer present in the server's latest manifest. Showing the last observed version (server version 1.28.0).
onyx_approval_guard
InactiveTool of onyx-paid-mcp
declared in 1.28.0
Pre-approval firewall — the safety check before your agent signs a token approve(). Give the spender (and optionally the amount + token); get a SIGNED ALLOW/REVIEW/BLOCK verdict: is the amount unlimited (the #1 drain vector — we recommend a finite amount instead)? is the spender a plain EOA (almost always a drainer)? is it a verified, established contract? Catches the malicious/unlimited approval that empties a wallet BEFORE the agent signs it. Every verdict Ed25519-signed. The highest-frequency safety call an on-chain agent makes. (price: $0.10 USDC, tier: metered)
Parameters schema
{
"type": "object",
"required": [
"spender"
],
"properties": {
"token": {
"type": "string",
"description": "Optional. The ERC-20 token address being approved, for context."
},
"spender": {
"type": "string",
"description": "0x address that will receive spend approval (the `spender` arg of approve()). Required."
},
"amount_raw": {
"type": "string",
"description": "Optional. The raw approval amount as a base-10 integer string (the uint the agent is about to approve). Pass it to detect unlimited/max approvals. Omit to assess the spender only."
}
}
}Parent server
onyx-paid-mcp
https://github.com/dimitrilaouanis-tech/onyx-mcp
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