crypto.btc-utxos

SERVERMcp SOURCE@2sio/mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-2s-io-mcp/crypto.btc-utxos.md

WHAT IT DOES

What crypto.btc-utxos does on Mcp

AI agents call crypto.btc-utxos to retrieve information from Mcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why crypto.btc-utxos is rated Low

This tool performs a blockchain data lookup operation. It retrieves unspent transaction outputs from a Bitcoin address—a pure read operation with no side effects, no code execution, and no financial transaction capability. While the server itself handles financial settlement (via x402 in USDC), this particular tool only queries public blockchain data and cannot move funds, execute transfers, or modify state.

From the tool's definition Tool retrieves UTXOs for a Bitcoin address with 'each with txid, output index, value (sats + BTC), confirmation status, and block height.' It queries blockchain data without modifying, deleting, or executing transactions.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs crypto.btc-utxos safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For crypto.btc-utxos, this is the rule to start with:

crypto.btc-utxos Allowed

crypto.btc-utxos is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "crypto.btc-utxos": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp, apply this rule, and every crypto.btc-utxos call is checked against it from then on.

FAQ

Questions about crypto.btc-utxos

What does the crypto.btc-utxos tool do? +

Unspent transaction outputs (UTXOs) for a Bitcoin address (free/keyless): each with txid, output index, value (sats + BTC), confirmation status, and block height. Sorted largest-first. For coin selection, balance verification, and wallet tooling. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on crypto.btc-utxos? +

Register the MCP server in PolicyLayer and add a rule for crypto.btc-utxos: 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 Mcp. Nothing to install.

What risk level is crypto.btc-utxos? +

crypto.btc-utxos is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit crypto.btc-utxos? +

Yes. Add a rate_limit block to the crypto.btc-utxos 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.

How do I block crypto.btc-utxos completely? +

Set action: deny in the PolicyLayer policy for crypto.btc-utxos. 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.

What MCP server provides crypto.btc-utxos? +

crypto.btc-utxos is provided by the MCP server (@2sio/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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