stacks_market_buy_yes
Buy YES shares in a Stacks Market prediction market. Uses the buy-yes-auto function with slippage protection via a max-cost cap. The transaction will fail if the cost exceeds max_cost_ustx. Requires an unlocked wallet. Only available on mainnet.
This record as markdown: /tools/io-github-aibtcdev-mcp-server/stacks-market-buy-yes.md
What stacks_market_buy_yes does on Aibtc
AI agents use stacks_market_buy_yes to commit financial operations through Aibtc, usually the final step of a payment, billing, or trading workflow. A call moves real money.
Why stacks_market_buy_yes is rated Critical
This tool executes a real financial transaction on the Stacks blockchain mainnet, purchasing prediction market shares using actual cryptocurrency (STX/uSTX). It commits financial obligations, involves real funds from an unlocked wallet, and is irreversible once submitted to the blockchain.
From the tool's definition Buy YES shares in a Stacks Market prediction market... Uses the buy-yes-auto function with slippage protection via a max-cost cap... Requires an unlocked wallet. Only available on mainnet.
Attacks that exploit this kind of access
The rule that runs stacks_market_buy_yes 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 stacks_market_buy_yes, this is the rule to start with:
Any call to stacks_market_buy_yes 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 stacks_market_buy_yes call is checked against it from then on.
Questions about stacks_market_buy_yes
Buy YES shares in a Stacks Market prediction market. Uses the buy-yes-auto function with slippage protection via a max-cost cap. The transaction will fail if the cost exceeds max_cost_ustx. Requires an unlocked wallet. Only available on mainnet. 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 stacks_market_buy_yes: 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.
stacks_market_buy_yes 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 stacks_market_buy_yes 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 stacks_market_buy_yes. 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.
stacks_market_buy_yes 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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