molclaw-file-transfer

File Transfer

Invocation

Use the exact tool name and parameter schema exposed by the current harness. Tool names in SDK examples below are raw MCP names, not model-facing aliases. Local files must be uploaded with molclaw-file-transfer before a server tool can use them. Repair PDB inputs first when the workflow requires it.

When the client-exposed schema includes local_file_path, prefer this client-side form for files already present in the current local workspace. For upload, call base64_to_server_file with file_name and local_file_path and omit file_base64_string. For download, call server_file_to_base64 with the server's file_path and a new, unique filename in local_file_path; a successful result returns its absolute local path. Reuse that returned path for later local operations or uploads. An absolute path inside the allowed workspace is also accepted; use it for a file created by a local tool. Do not copy file bytes through the model output. The client validates the path and performs the encoding or decoding; the MCP server still uses its original Base64 interface. If the exposed schema lacks local_file_path, use the original Base64 form below. Do not supply both upload forms in one call.

The Python examples below call the public SCP service directly and demonstrate its original Base64 interface. They do not show the client-side path extension.

1. Transfer local file to SCP server

Example code:

import base64

client = DrugSDAClient("https://scp.intern-ai.org.cn/api/v1/mcp/2/DrugSDA-Tool")
if not await client.connect():
    print("connection failed")
    return

## Convert local file to base64 string
local_file = "/path/a.txt"		#Input local file path
with open(local_file, "rb") as f:
    file_content = f.read()
    file_base64_string = base64.b64encode(file_content).decode('utf-8')

## Call tool base64_to_server_file to save base64 string as server file
response = await client.session.call_tool(
    "base64_to_server_file",
    arguments={
        "file_name": "a.txt",
        "file_base64_string": file_base64_string
    }
)
result = client.parse_result(response)
save_file = result["save_file"]	#Server file path after transfer	

await client.disconnect()