btc_sign_batch_psbt

Sign multiple PSBTs in a single call.

SERVERBitcoin wallet MCP server SOURCEmarkmhendrickson/mcp-server-bitcoin

Critical RISK CLASS

Category Financial

Parameters 00 required

Recommended Approval-gatedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/markmhendrickson-mcp-server-bitcoin/btc-sign-batch-psbt.md

WHAT IT DOES

What btc_sign_batch_psbt does on Bitcoin wallet MCP server

AI agents use btc_sign_batch_psbt to commit financial operations through Bitcoin wallet MCP server, usually the final step of a payment, billing, or trading workflow. A call moves real money.

RISK

Why btc_sign_batch_psbt is rated Critical

Signing PSBTs is the cryptographic authorization step that enables Bitcoin transactions to be finalized and broadcast to the network. While signing alone doesn't move funds, it commits the wallet's authorization to potentially multiple financial transactions at once.

From the tool's definition Sign multiple PSBTs in a single call — signing PSBTs (Partially Signed Bitcoin Transactions) authorizes Bitcoin transactions for broadcast, directly enabling movement of funds.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs btc_sign_batch_psbt 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 btc_sign_batch_psbt, this is the rule to start with:

btc_sign_batch_psbt Approval-gated

Any call to btc_sign_batch_psbt is blocked until a human approves it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "btc_sign_batch_psbt": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

GATE 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 btc_sign_batch_psbt call is checked against it from then on.

FAQ

Questions about btc_sign_batch_psbt

What does the btc_sign_batch_psbt tool do? +

Sign multiple PSBTs in a single call. It is categorised as a Financial tool in the Bitcoin wallet MCP server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on btc_sign_batch_psbt? +

Register the Bitcoin wallet MCP server MCP server in PolicyLayer and add a rule for btc_sign_batch_psbt: 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 btc_sign_batch_psbt? +

btc_sign_batch_psbt is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit btc_sign_batch_psbt? +

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

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

btc_sign_batch_psbt 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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