binLookup

Returns bank and issuer information for a Bank Identification Number. Requires a bin, typically the first 6-8 digits of a credit card number.

SERVERAPI Ninjas SOURCEhttps://mcp.api-ninjas.com/mcp

Low RISK CLASS

Category Read

Parameters 11 required

Recommended Allowedsee the rule below

Registry record Grade D, identity unverified Pull the record →

This record as markdown: /tools/com-api-ninjas-mcp/binlookup.md

WHAT IT DOES

What binLookup does on API Ninjas

AI agents call binLookup to retrieve information from API Ninjas without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Parameter	Type	Required	Description
`bin`	string	Yes	The Bank Identification Number (BIN) to look up. This is typically the first 6-8 digits of a credit card number.

Parameters from the server's own tool schema.

RISK

Why binLookup is rated Low

Even though binLookup only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs binLookup safely

PolicyLayer is an MCP gateway: it sits between your AI agents and API Ninjas, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For binLookup, this is the rule to start with:

binLookup Allowed

binLookup is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "binLookup": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect API Ninjas, apply this rule, and every binLookup call is checked against it from then on.

FAQ

Questions about binLookup

What does the binLookup tool do? +

Returns bank and issuer information for a Bank Identification Number. Requires a bin, typically the first 6-8 digits of a credit card number. It is categorised as a Read tool in the API Ninjas MCP Server, which means it retrieves data without modifying state.

What parameters does binLookup accept? +

binLookup accepts 1 parameter: bin. Required: bin. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on binLookup? +

Register the API Ninjas MCP server in PolicyLayer and add a rule for binLookup: 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 API Ninjas. Nothing to install.

What risk level is binLookup? +

binLookup is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit binLookup? +

Yes. Add a rate_limit block to the binLookup 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.

How do I block binLookup completely? +

Set action: deny in the PolicyLayer policy for binLookup. 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.

What MCP server provides binLookup? +

binLookup is provided by the API Ninjas MCP server (https://mcp.api-ninjas.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on API Ninjas, and thousands of servers like it.

This server

All 244 API Ninjas tools →

Across the catalogue

The MCP Attack Database →

Guides

Roll out MCP under one policy →Data exfiltration →MCP token cost →