How to Use the ShangQian / 上上签 (BestSign) MCP in Google ADK

Q: What is the best practice for initial user setup with ShangQian / 上上签 (BestSign) on Google ADK?

You should use registershangqianuser first. This ensures that when your agents attempt to sign a contract, the signing party already has an active, recognized account.

Build enterprise agents with Google ADK: Automate ShangQian / 上上签 (BestSign) contracts using BigQuery and Gemini models.

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Connect ShangQian / 上上签 (BestSign) MCP to Google ADK

Create your Vinkius account to connect ShangQian / 上上签 (BestSign) to Google ADK — we handle the hosting, security, and runtime updates so you don't have to. No server setup required.

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Setup ShangQian / 上上签 (BestSign) with Google ADK

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Use the MCP Server for Contract Creation

To start a contract, your agent calls `create_shangqian_contract`. It takes parameters like agreement type and parties involved. This initiates the digital signing process within the ShangQian / 上上签 (BestSign) system. The whole workflow is managed by this MCP Server, which ensures all required fields are populated before attempting to issue a contract.

Google ADK Identity Verification

When you need to confirm credentials, call `verify_identity_v2`. This validates the user against necessary records. The tool returns a clear pass/fail status. This verification is critical because it precedes calling `sign_contract_now`, making sure your Gemini-powered agent only signs when trust has been established.

Retrieve and Manage Contract Files

Need the final document? Use `get_contract_download` to retrieve a direct URL for the signed contract. This is great for passing files into BigQuery for later analysis. If you need template management, call `upload_shangqian_template`. You upload the base document, and this makes it available for future contracts.

Setup guide

Set up ShangQian / 上上签 (BestSign) MCP in Google ADK

Prerequisites

Python 3.10+ installed
google-adk package (pip install google-adk)
Active Vinkius subscription with a valid endpoint token

1

Install Google ADK

Run pip install google-adk to install the Agent Development Kit. MCP support is included via the McpToolset class.
2

Connect via SSE transport

Use McpToolset.from_server() with SseServerParams pointing to your Vinkius endpoint. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Create an LlmAgent

Pass the returned mcp_tools list directly to LlmAgent(tools=mcp_tools). The ADK maps each MCP tool to a native Gemini function call — no manual schema definitions required.
4

Run with any Gemini model

The agent works with any Gemini model (gemini-2.0-flash, gemini-2.5-pro, etc.). Copy the full example on the right to get started with ShangQian / 上上签 (BestSign) tools in your ADK agent.

agent.py

from google.adk.agents import LlmAgent
from google.adk.tools.mcp_tool.mcp_toolset import McpToolset
from google.adk.tools.mcp_tool.mcp_session_manager import SseServerParams

# Connect to the MCP via SSE
mcp_tools, exit_stack = await McpToolset.from_server(
    connection_params=SseServerParams(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    )
)

# Create your agent with auto-discovered tools
agent = LlmAgent(
    name="ShangQian / 上上签 (BestSign)_agent",
    model="gemini-2.0-flash",
    instruction="You have access to ShangQian / 上上签 (BestSign) tools via MCP.",
    tools=mcp_tools,
)

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Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by ShangQian / 上上签 (BestSign). All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about ShangQian / 上上签 (BestSign) MCP in Google ADK

The MCP Server acts as a callable service that your Gemini agent can interact with. It allows agents running on Google Cloud to perform legal document actions without needing direct database access.

You can automate the process by looping through user IDs and calling `sign_contract_now` repeatedly. The agent handles the iteration, and the MCP Server manages the signatures.

You should use `register_shangqian_user` first. This ensures that when your agents attempt to sign a contract, the signing party already has an active, recognized account.

No. The MCP Server only handles signature actions and metadata retrieval. It doesn't write directly to your cloud storage; it just provides the necessary inputs.

It specifically touches User Certificates and contract-related metadata, including document IDs and creation timestamps. This is essential data for compliance checks.

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