create_opensea_listing · SEI MCP Server V2 MCP

WHAT IT DOES

What create_opensea_listing does on SEI MCP Server V2

AI agents use create_opensea_listing to create or update resources in SEI MCP Server V2 — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your SEI MCP Server V2 environment.

WHY IT NEEDS A POLICY

Why create_opensea_listing needs a policy

This is a Write operation because it creates new data (a marketplace listing) that modifies the state of an account on OpenSea. While not Destructive (the listing can be cancelled), it is Write-level because it commits the user's asset to a public marketplace and establishes a contractual offer.

From the tool's definition create_opensea_listing creates and submits a listing for an asset on OpenSea. The verb 'create and submit' indicates irreversible creation of a public marketplace listing that represents a commitment to sell an NFT at a specified price.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_opensea_listing Rate-limited

create_opensea_listing 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": {
    "create_opensea_listing": {
      "limits": [
        {
          "counter": "create_opensea_listing_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches SEI MCP Server V2, so you can run agents against it safely.

FAQ

Questions about create_opensea_listing

What does the create_opensea_listing tool do? +

Create and submit a listing for an asset on OpenSea. It is categorised as a Write tool in the SEI MCP Server V2 MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_opensea_listing? +

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

What risk level is create_opensea_listing? +

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

Can I rate-limit create_opensea_listing? +

Yes. Add a rate_limit block to the create_opensea_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 create_opensea_listing completely? +

Set action: deny in the PolicyLayer policy for create_opensea_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 create_opensea_listing? +

create_opensea_listing 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.