ordinals_cancel_listing
Cancel an active Magic Eden listing for an inscription. Requests a cancellation PSBT from Magic Eden. The seller signs the PSBT to invalidate the active listing and reclaim the inscription UTXO. No BTC fee is required beyond the miner fee for the cancellation transaction itself. Requires an unloc...
This record as markdown: /tools/io-github-aibtcdev-mcp-server/ordinals-cancel-listing.md
What ordinals_cancel_listing does on Aibtc
AI agents use ordinals_cancel_listing to commit financial operations through Aibtc, usually the final step of a payment, billing, or trading workflow. A call moves real money.
Why ordinals_cancel_listing is rated Critical
This tool cancels a financial listing on a marketplace (Magic Eden) for a Bitcoin ordinal inscription. It involves signing a Bitcoin transaction (PSBT) that modifies the state of a financial asset listing and moves/reclaims a Bitcoin UTXO. This directly involves financial asset management and blockchain transactions, making Financial the appropriate category.
From the tool's definition Cancel an active Magic Eden listing for an inscription. The seller signs the PSBT to invalidate the active listing and reclaim the inscription UTXO.
Attacks that exploit this kind of access
The rule that runs ordinals_cancel_listing safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Aibtc, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For ordinals_cancel_listing, this is the rule to start with:
Any call to ordinals_cancel_listing is blocked until a human approves it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect Aibtc, apply this rule, and every ordinals_cancel_listing call is checked against it from then on.
Questions about ordinals_cancel_listing
Cancel an active Magic Eden listing for an inscription. Requests a cancellation PSBT from Magic Eden. The seller signs the PSBT to invalidate the active listing and reclaim the inscription UTXO. No BTC fee is required beyond the miner fee for the cancellation transaction itself. Requires an unlocked wallet with Bitcoin (Taproot) keys. Steps: 1. Call this tool with the inscriptionId you want to delist 2. Sign the returned PSBT using psbt_sign 3. Broadcast using psbt_broadcast to finalize the cancellation. It is categorised as a Financial tool in the Aibtc MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Aibtc MCP server in PolicyLayer and add a rule for ordinals_cancel_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 Aibtc. Nothing to install.
ordinals_cancel_listing 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 ordinals_cancel_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.
Set action: deny in the PolicyLayer policy for ordinals_cancel_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.
ordinals_cancel_listing is provided by the Aibtc MCP server (aibtcdev/aibtc-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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