get_listing

Get one listing (incl. seller DID + KYA status) as JSON-LD.

SERVERMarketplace SOURCEhttps://get4agent.com/mcp

Low RISK CLASS

Category Read

Parameters 11 required

Recommended Allowedsee the rule below

Registry record Grade C, identity unverified Pull the record →

This record as markdown: /tools/com-get4agent-marketplace/get-listing.md

WHAT IT DOES

What get_listing does on Marketplace

AI agents call get_listing to retrieve information from Marketplace 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
`listing_id`	string	Yes

Parameters from the server's own tool schema.

RISK

Why get_listing is rated Low

Even though get_listing 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 get_listing safely

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

get_listing Allowed

get_listing 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": {
    "get_listing": {}
  }
}

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

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

FAQ

Questions about get_listing

What does the get_listing tool do? +

Get one listing (incl. seller DID + KYA status) as JSON-LD. It is categorised as a Read tool in the Marketplace MCP Server, which means it retrieves data without modifying state.

What parameters does get_listing accept? +

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

How do I enforce a policy on get_listing? +

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

What risk level is get_listing? +

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

Can I rate-limit get_listing? +

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

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

get_listing is provided by the Marketplace MCP server (https://get4agent.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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