3land_buyNFT

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

Critical RISK CLASS

Category Financial

Parameters 22 required

Recommended Approval-gatedsee the rule below

Registry record Grade F, identity unverified Pull the record →

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

WHAT IT DOES

What 3land_buyNFT does on Sap

AI agents use 3land_buyNFT to commit financial operations through Sap, usually the final step of a payment, billing, or trading workflow. A call moves real money.

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

Parameters from the server's own tool schema.

RISK

Why 3land_buyNFT is rated Critical

Purchases NFTs by moving funds between wallets, constituting a financial transaction.

From the tool's definition Purchase an NFT... marketplace price, seller/buyer wallet

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs 3land_buyNFT 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_buyNFT, this is the rule to start with:

3land_buyNFT Approval-gated

Any call to 3land_buyNFT is blocked until a human approves it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "3land_buyNFT": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

GATE THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about 3land_buyNFT

What does the 3land_buyNFT tool do? +

Purchase an NFT from a 3.Land listing. 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: Solana value-action or trading 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 Financial tool in the Sap MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

What parameters does 3land_buyNFT accept? +

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

How do I enforce a policy on 3land_buyNFT? +

Register the Sap MCP server in PolicyLayer and add a rule for 3land_buyNFT: 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_buyNFT? +

3land_buyNFT is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit 3land_buyNFT? +

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

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

3land_buyNFT 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.

KEEP EXPLORING

More on Sap, and thousands of servers like it.

This server

All 375 Sap tools → Critical-risk tools on this server →

Across the catalogue

All critical-risk MCP tools → The MCP Attack Database →

Guides

Govern MCP payment tools →Human-in-the-loop →Tool call approval →