Withdraw accumulated ETH from your Flipr agent wallet to a specified address. Returns transaction hash. Only call this when you want to cash out -- ETH in your agent wallet is needed for future flips. Cost: $0.001 USDC. Accepts payment on Base mainnet OR Solana mainnet (auto-bridged). See http://...
Part of the Flipr X402 server.
Free to start. No card required.
AI agents use flipr_withdraw to initiate financial transactions through Flipr X402. Financial operations involve real money and are irreversible once processed. PolicyLayer blocks financial tools by default, requiring explicit human approval with transaction-level limits to prevent unauthorised spending.
flipr_withdraw moves real money. Without a policy, an autonomous agent could initiate transactions that drain accounts or exceed budgets. PolicyLayer blocks financial tools by default, requiring human-in-the-loop approval with configurable spending limits per transaction and per time window.
Financial tools involve real money. Block by default and require explicit human approval before enabling.
{
"version": "1",
"default": "deny",
"tools": {
"flipr_withdraw": {
"deny_if": [
{
"conditions": [],
"on_deny": "Requires human approval."
}
]
}
}
}See the full Flipr X402 policy for all 19 tools.
These attack patterns abuse exactly the kind of access flipr_withdraw gives an agent. Each links to the full case and the policy that stops it:
Other financial tools across the catalogue. The same approach applies to each: deny by default, or require human approval.
Withdraw accumulated ETH from your Flipr agent wallet to a specified address. Returns transaction hash. Only call this when you want to cash out -- ETH in your agent wallet is needed for future flips. Cost: $0.001 USDC. Accepts payment on Base mainnet OR Solana mainnet (auto-bridged). See http://localhost:4402/integration#solana for details. [paymentNetworks: ["base","solana"]] [pricing: {"cost":"0.001","currency":"USDC","type":"flat","network":"eip155:8453"}]. It is categorised as a Financial tool in the Flipr X402 MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Flipr X402 MCP server in PolicyLayer and add a rule for flipr_withdraw: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Flipr X402. Nothing to install.
flipr_withdraw is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the flipr_withdraw rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for flipr_withdraw. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
flipr_withdraw is provided by the Flipr X402 MCP server (https://flipr-x402.fly.dev/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 19 Flipr X402 tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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