wallet_getHeaderForHeight
Gets the 80-byte block header at a given height.
This record as markdown: /tools/b-open-io-bsv-mcp/wallet-getheaderforheight.md
What wallet_getHeaderForHeight does on Bitcoin SV MCP Server
AI agents call wallet_getHeaderForHeight to retrieve information from Bitcoin SV MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why wallet_getHeaderForHeight is rated Low
This tool retrieves a read-only block header from the blockchain at a specified height. It performs a query operation (get) with no capability to modify, delete, or execute code. The data returned is immutable historical blockchain information. Even in an adversarial scenario, misuse would only allow an agent to retrieve existing public blockchain data, presenting minimal risk.
From the tool's definition Tool name 'wallet_getHeaderForHeight' and description 'Gets the 80-byte block header at a given height' indicate a retrieval operation that queries blockchain data without modification or side effects.
Attacks that exploit this kind of access
The rule that runs wallet_getHeaderForHeight safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Bitcoin SV MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For wallet_getHeaderForHeight, this is the rule to start with:
wallet_getHeaderForHeight is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Bitcoin SV MCP Server, apply this rule, and every wallet_getHeaderForHeight call is checked against it from then on.
Questions about wallet_getHeaderForHeight
Gets the 80-byte block header at a given height. It is categorised as a Read tool in the Bitcoin SV MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Bitcoin SV MCP Server MCP server in PolicyLayer and add a rule for wallet_getHeaderForHeight: 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 Bitcoin SV MCP Server. Nothing to install.
wallet_getHeaderForHeight is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the wallet_getHeaderForHeight 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 wallet_getHeaderForHeight. 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.
wallet_getHeaderForHeight is provided by the Bitcoin SV MCP Server MCP server (b-open-io/bsv-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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