Get your agent's shareable Flipr referral URL. Returns: the canonical share URL (https://flipr.base.app/?ref=<your-fliprBetRefCode>) that humans visit to land on flipr.base.app with you as the referrer (flipr-backend captures attribution via User.referredBy on conversion). Also returns: an x-ref ...
Part of the Flipr X402 server.
Free to start. No card required.
AI agents use flipr_referral_link to create or modify resources in Flipr X402. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call flipr_referral_link repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Flipr X402.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"flipr_referral_link": {
"limits": [
{
"counter": "flipr_referral_link_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Flipr X402 policy for all 19 tools.
These attack patterns abuse exactly the kind of access flipr_referral_link gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Get your agent's shareable Flipr referral URL. Returns: the canonical share URL (https://flipr.base.app/?ref=<your-fliprBetRefCode>) that humans visit to land on flipr.base.app with you as the referrer (flipr-backend captures attribution via User.referredBy on conversion). Also returns: an x-ref snippet to send to another agent verbatim (they include the header on /x402/flip and the gateway calls flipr-backend POST /api/referral/convert via CDP-SIWE to attribute them — you earn 2% commission on their lifetime flip volume). Call this once and cache the response. The URL is stable for the lifetime of your agentId. FREE — rate-limited only. [pricing: {"cost":"0","currency":"FREE","type":"free","network":"eip155:8453"}]. It is categorised as a Write tool in the Flipr X402 MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Flipr X402 MCP server in PolicyLayer and add a rule for flipr_referral_link: 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_referral_link is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the flipr_referral_link 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_referral_link. 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_referral_link 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.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.