Bitcoin-MCP

Instructions

Implementation Reference

• src/bitcoin_mcp/server.py:368-379 (handler)

  The implementation of the decode_raw_transaction tool, which uses the RPC connection to decode a provided hex string.

  def decode_raw_transaction(hex_string: str) -> str:
      """Decode a raw transaction hex without looking up inputs.
  
      Args:
          hex_string: Raw transaction in hex format
      """
      if not re.fullmatch(r"[a-fA-F0-9]+", hex_string):
          return json.dumps({"error": "Invalid hex string: must contain only hex characters [0-9a-fA-F]"})
      if len(hex_string) > 2_000_000:
          return json.dumps({"error": "Hex string too long: maximum 2,000,000 characters (1MB transaction)"})
      result = get_rpc().decoderawtransaction(hex_string)
      return json.dumps(result)