Identify a payment card from its BIN/IIN (leading 6-8 digits). Pass the BIN or leading card digits and get card brand (Visa/Mastercard/…), card type (debit/credit), category, issuing bank, and country (ISO alpha-2 + name). Longest-prefix match against an open CC-BY dataset. Identifies issuer/bran...
AI agents call finance.bin to retrieve information from Mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a read-only lookup operation. While it relates to payment processing, it merely retrieves publicly available card metadata for informational purposes (routing, fraud checks, UX). It does not move money, create financial obligations, or modify any data. The tool cannot be misused to charge accounts, access cardholder information, or perform destructive operations.
From the tool's definition Tool performs lookup and identification of payment card metadata (brand, type, issuer, country) from BIN digits.
Attacks that exploit this kind of access
Identify a payment card from its BIN/IIN (leading 6-8 digits). Pass the BIN or leading card digits and get card brand (Visa/Mastercard/…), card type (debit/credit), category, issuing bank, and country (ISO alpha-2 + name). Longest-prefix match against an open CC-BY dataset. Identifies issuer/brand/country only — never the cardholder or account. For payment routing, fraud checks, checkout UX. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.
Register the MCP server in PolicyLayer and add a rule for finance.bin: 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 Mcp. Nothing to install.
finance.bin is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the finance.bin 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 finance.bin. 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.
finance.bin is provided by the MCP server (@2sio/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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