3land_cancelListing

SERVERSap SOURCEhttps://mcp.sap.oobeprotocol.ai/mcp

Medium RISK CLASS

Category Write

Parameters 22 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/oobe-protocol-labs-sap-mcp-server/3land-cancellisting.md

WHAT IT DOES

What 3land_cancelListing does on Sap

AI agents use 3land_cancelListing to create or update resources in Sap, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Sap environment.

Parameter	Type	Required	Description
`seller`	string	Yes	Solana public key (base58)
`listingId`	string	Yes	3.Land listing ID to cancel

Parameters from the server's own tool schema.

RISK

Why 3land_cancelListing is rated Medium

Cancels an NFT listing reversibly; no funds moved, no data destroyed.

From the tool's definition Cancel an active NFT listing; operation class write

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs 3land_cancelListing safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Sap, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For 3land_cancelListing, this is the rule to start with:

3land_cancelListing Rate-limited

3land_cancelListing stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "3land_cancelListing": {
      "limits": [
        {
          "counter": "3land_cancellisting_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Sap, apply this rule, and every 3land_cancelListing call is checked against it from then on.

FAQ

Questions about 3land_cancelListing

What does the 3land_cancelListing tool do? +

Cancel an active NFT listing on 3.Land. SAP MCP context: Protocol 3land; operation class write. Use for 3.Land NFT collection, minting, listing, cancellation, and purchase flows. Confirm marketplace price, seller/buyer wallet, collection, and listing state before writes. Pair marketplace actions with SAP registry metadata only when the marketplace asset is part of the agent identity or service catalog. SAP MCP execution guidance: Intent: SAP MCP tool workflow. Pricing: paid read-premium; estimate first, then use sap_payments_call_paid_tool when the runtime cannot replay x402 natively. Routing: hosted accountless write is blocked; do not call this as a paid hosted write and no x402 payment should be charged. Use the local sap_payments bridge or a hosted unsigned builder when user signing is required. Signer boundary: user-controlled local profile or external signer; OOBE hosted MCP remains non-custodial. It is categorised as a Write tool in the Sap MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does 3land_cancelListing accept? +

3land_cancelListing accepts 2 parameters: seller, listingId. Required: seller, listingId. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on 3land_cancelListing? +

Register the Sap MCP server in PolicyLayer and add a rule for 3land_cancelListing: 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 Sap. Nothing to install.

What risk level is 3land_cancelListing? +

3land_cancelListing is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit 3land_cancelListing? +

Yes. Add a rate_limit block to the 3land_cancelListing 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 3land_cancelListing completely? +

Set action: deny in the PolicyLayer policy for 3land_cancelListing. 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 3land_cancelListing? +

3land_cancelListing is provided by the Sap MCP server (https://mcp.sap.oobeprotocol.ai/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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