Retrieve UTXOs (unspent transaction outputs) held by a specific Bitcoin address with optional type filtering. Use this to get detailed information about available UTXOs for spending or analysis.
AI agents call address_outputs_get to retrieve information from Satstream MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries blockchain data (UTXO information for an address) without creating, modifying, deleting, or executing anything. It is a pure retrieval operation. The blast radius of misuse is minimal—an attacker gains visibility into which outputs are spendable from a given address, which is public blockchain information. No financial transaction occurs, no code executes, and no data is altered.
From the tool's definition Tool description states 'Retrieve UTXOs...with optional type filtering' and 'get detailed information about available UTXOs for spending or analysis.' The verb 'Retrieve' and 'get' indicate data querying with no modification.
Attacks that exploit this kind of access
Retrieve UTXOs (unspent transaction outputs) held by a specific Bitcoin address with optional type filtering. Use this to get detailed information about available UTXOs for spending or analysis. It is categorised as a Read tool in the Satstream MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Satstream MCP Server MCP server in PolicyLayer and add a rule for address_outputs_get: 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 Satstream MCP Server. Nothing to install.
address_outputs_get 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 address_outputs_get 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 address_outputs_get. 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.
address_outputs_get is provided by the Satstream MCP Server MCP server (satstream/ss-mcp). 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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