stx_estimate_fee

Estimate Stacks transaction fee in micro-STX.

SERVERBitcoin wallet MCP server SOURCEmarkmhendrickson/mcp-server-bitcoin

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/markmhendrickson-mcp-server-bitcoin/stx-estimate-fee.md

WHAT IT DOES

What stx_estimate_fee does on Bitcoin wallet MCP server

AI agents call stx_estimate_fee to retrieve information from Bitcoin wallet MCP server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why stx_estimate_fee is rated Low

The tool performs a read-only estimation/calculation of transaction fees. It does not send transactions, move funds, or execute code with side effects. Similar to 'btc_estimate_fee' (a sibling tool), it is a lookup/estimation function that provides information to inform decision-making but takes no irreversible action.

From the tool's definition Tool name 'stx_estimate_fee' and description 'Estimate Stacks transaction fee in micro-STX' indicate a query operation that retrieves fee information without modifying state or committing funds.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs stx_estimate_fee safely

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

stx_estimate_fee Allowed

stx_estimate_fee 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": {
    "stx_estimate_fee": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect Bitcoin wallet MCP server, apply this rule, and every stx_estimate_fee call is checked against it from then on.

FAQ

Questions about stx_estimate_fee

What does the stx_estimate_fee tool do? +

Estimate Stacks transaction fee in micro-STX. It is categorised as a Read tool in the Bitcoin wallet MCP server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on stx_estimate_fee? +

Register the Bitcoin wallet MCP server MCP server in PolicyLayer and add a rule for stx_estimate_fee: 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 wallet MCP server. Nothing to install.

What risk level is stx_estimate_fee? +

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

Can I rate-limit stx_estimate_fee? +

Yes. Add a rate_limit block to the stx_estimate_fee 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 stx_estimate_fee completely? +

Set action: deny in the PolicyLayer policy for stx_estimate_fee. 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 stx_estimate_fee? +

stx_estimate_fee is provided by the Bitcoin wallet MCP server MCP server (markmhendrickson/mcp-server-bitcoin). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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