Create and submit an offer for an asset on OpenSea.
AI agents use create_opensea_offer to commit financial operations through SEI MCP Server V2 — usually the final step of a payment, billing, or trading workflow. A call moves real money.
Creating and submitting an offer on OpenSea constitutes a financial commitment — it places a bid/offer that can be accepted by the seller, potentially obligating the agent to purchase an NFT asset. This involves financial obligations on a blockchain marketplace, making it a Financial category action with high severity due to potential for significant fund commitment without easy reversal.
From the tool's definition Create and submit an offer for an asset on OpenSea
Attacks that exploit this kind of access
Create and submit an offer for an asset on OpenSea. It is categorised as a Financial tool in the SEI MCP Server V2 MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the SEI MCP Server V2 MCP server in PolicyLayer and add a rule for create_opensea_offer: 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.
create_opensea_offer is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the create_opensea_offer 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.
Set action: deny in the PolicyLayer policy for create_opensea_offer. 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.
create_opensea_offer 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.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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