isw_fetch_cards_by_issuer

Fetch cards by issuer number.

SERVERInterswitch SOURCEinterswitch-mcp-server

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-dairus01-interswitch-mcp-server/isw-fetch-cards-by-issuer.md

WHAT IT DOES

What isw_fetch_cards_by_issuer does on Interswitch

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

RISK

Why isw_fetch_cards_by_issuer is rated Low

This tool retrieves or queries card data filtered by issuer number. There are no side effects, data modifications, destructive actions, or financial transactions involved. Despite the financial domain (Interswitch payment processing), the tool itself only performs a read operation.

From the tool's definition Tool name 'fetch_cards_by_issuer' and description 'Fetch cards by issuer number' indicate data retrieval with no modification or financial transaction. The verb 'fetch' is a Read operation pattern.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs isw_fetch_cards_by_issuer safely

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

isw_fetch_cards_by_issuer Allowed

isw_fetch_cards_by_issuer 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": {
    "isw_fetch_cards_by_issuer": {}
  }
}

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

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

FAQ

Questions about isw_fetch_cards_by_issuer

What does the isw_fetch_cards_by_issuer tool do? +

Fetch cards by issuer number. It is categorised as a Read tool in the Interswitch MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on isw_fetch_cards_by_issuer? +

Register the Interswitch MCP server in PolicyLayer and add a rule for isw_fetch_cards_by_issuer: 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 Interswitch. Nothing to install.

What risk level is isw_fetch_cards_by_issuer? +

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

Can I rate-limit isw_fetch_cards_by_issuer? +

Yes. Add a rate_limit block to the isw_fetch_cards_by_issuer 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 isw_fetch_cards_by_issuer completely? +

Set action: deny in the PolicyLayer policy for isw_fetch_cards_by_issuer. 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 isw_fetch_cards_by_issuer? +

isw_fetch_cards_by_issuer is provided by the Interswitch MCP server (interswitch-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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