Retrieves a public key by protocol/key derivation. Use identityKey:true for the root identity key. protocolID is a JSON array like [2,
AI agents call wallet_getPublicKey to retrieve information from Bitcoin SV MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves existing data (a public key) from the wallet without creating, modifying, deleting, or executing code. Public key retrieval is a read-only operation with no side effects. Severity is low because public keys are meant to be public and their exposure does not directly compromise funds or enable unauthorized transactions.
From the tool's definition Tool name 'wallet_getPublicKey' and description 'Retrieves a public key by protocol/key derivation' indicate a query operation that reads and returns cryptographic key data without modifying or executing operations.
Risk signalsAdmin/system-level operation
Documented attack patterns abuse exactly the kind of access wallet_getPublicKey gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Bitcoin SV MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for wallet_getPublicKey:
{
"version": "1",
"default": "deny",
"tools": {
"wallet_getPublicKey": {}
}
}wallet_getPublicKey is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Retrieves a public key by protocol/key derivation. Use identityKey:true for the root identity key. protocolID is a JSON array like [2,. 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_getPublicKey: 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_getPublicKey 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_getPublicKey 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_getPublicKey. 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_getPublicKey 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.
Start from Bitcoin SV MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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80 Bitcoin SV MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.