get_opensea_best_listing_for_nft

Get the best (lowest priced) listing for a single NFT.

SERVERSEI MCP Server V2 SOURCEtestinguser1111111/sei-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/testinguser1111111-sei-mcp-server/get-opensea-best-listing-for-nft.md

WHAT IT DOES

What get_opensea_best_listing_for_nft does on SEI MCP Server V2

AI agents call get_opensea_best_listing_for_nft to retrieve information from SEI MCP Server V2 without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why get_opensea_best_listing_for_nft is rated Low

This tool queries OpenSea marketplace data to retrieve pricing information for NFTs. It performs a read-only lookup operation that returns information without creating, modifying, deleting, or executing any state-changing operations. The blast radius of misuse is minimal since the agent merely receives publicly available pricing data.

From the tool's definition Tool name explicitly contains 'get_' and description states 'Get the best (lowest priced) listing' - purely retrieves NFT marketplace data with no side effects or modifications.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_opensea_best_listing_for_nft safely

PolicyLayer is an MCP gateway: it sits between your AI agents and SEI MCP Server V2, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For get_opensea_best_listing_for_nft, this is the rule to start with:

get_opensea_best_listing_for_nft Allowed

get_opensea_best_listing_for_nft 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_opensea_best_listing_for_nft": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect SEI MCP Server V2, apply this rule, and every get_opensea_best_listing_for_nft call is checked against it from then on.

FAQ

Questions about get_opensea_best_listing_for_nft

What does the get_opensea_best_listing_for_nft tool do? +

Get the best (lowest priced) listing for a single NFT. It is categorised as a Read tool in the SEI MCP Server V2 MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_opensea_best_listing_for_nft? +

Register the SEI MCP Server V2 MCP server in PolicyLayer and add a rule for get_opensea_best_listing_for_nft: 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 SEI MCP Server V2. Nothing to install.

What risk level is get_opensea_best_listing_for_nft? +

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

Can I rate-limit get_opensea_best_listing_for_nft? +

Yes. Add a rate_limit block to the get_opensea_best_listing_for_nft 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_opensea_best_listing_for_nft completely? +

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

get_opensea_best_listing_for_nft is provided by the SEI MCP Server V2 MCP server (testinguser1111111/sei-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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