How do I find my ShangQian Developer ID and Secret?

Log in to the [BestSign Developer Platform](https://open.bestsign.cn/), navigate to the 'Application Management' or 'Credentials' section to find your unique Developer ID and RT Secret.

What is the 'account' identifier?

The account identifier is a unique string used to identify a user in the ShangQian system, typically a mobile phone number or an email address. It is required for registration and signing operations.

Does this server handle HMAC-SHA1 signatures?

Yes! The server automatically calculates the required HMAC-SHA1 signature using your RT Secret for every request, ensuring secure authorized communication with the ShangQian API.

ShangQian / 上上签 (BestSign) MCP Server for Pydantic AI 8 tools — connect in under 2 minutes

Name: ShangQian / 上上签 (BestSign)
Availability: InStock
Author: Vinkius

ai.pydantic.dev/mcp

Built by Vinkius GDPR 8 Tools SDK

Pydantic AI brings type-safe agent development to Python with first-class MCP support. Connect ShangQian / 上上签 (BestSign) through Vinkius and every tool is automatically validated against Pydantic schemas. catch errors at build time, not in production.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

import asyncio
from pydantic_ai import Agent
from pydantic_ai.mcp import MCPServerHTTP

async def main():
    # Your Vinkius token. get it at cloud.vinkius.com
    server = MCPServerHTTP(url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp")

    agent = Agent(
        model="openai:gpt-4o",
        mcp_servers=[server],
        system_prompt=(
            "You are an assistant with access to ShangQian / 上上签 (BestSign) "
            "(8 tools)."
        ),
    )

    result = await agent.run(
        "What tools are available in ShangQian / 上上签 (BestSign)?"
    )
    print(result.data)

asyncio.run(main())

Fully ManagedVinkius Servers

60%Token savings

High SecurityEnterprise-grade

IAMAccess control

EU AI ActCompliant

DLPData protection

V8 IsolateSandboxed

Ed25519Audit chain

<40msKill switch

Stream every event to Splunk, Datadog, or your own webhook in real-time

* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About ShangQian / 上上签 (BestSign) MCP Server

Empower your AI agent to orchestrate your digital document workflows and electronic signatures with ShangQian (BestSign / 上上签), the premier B2B digital signature platform in China. By connecting ShangQian to your agent, you transform complex contract lifecycle management, user identity verification (KYC), and signature orchestration into a natural conversation. Your agent can instantly register new personal or enterprise users, initialize contracts from pre-defined templates, retrieve detailed contract statuses, and even generate secure download links for executed documents without you ever needing to navigate the comprehensive BestSign Management Portal. Whether you are automating HR onboarding or coordinating high-volume commercial agreements, your agent acts as a real-time contract coordinator, providing accurate and fast results from a single, authorized source.

Pydantic AI validates every ShangQian / 上上签 (BestSign) tool response against typed schemas, catching data inconsistencies at build time. Connect 8 tools through Vinkius and switch between OpenAI, Anthropic, or Gemini without changing your integration code. full type safety, structured output guarantees, and dependency injection for testable agents.

What you can do

User Orchestration — Register new users, verify digital certificates, and perform KYC identity checks.
Contract Management — Create signature-ready contracts using templates and monitor real-time completion status.
Template Automation — List and audit your library of contract templates and upload new document definitions.
Execution Control — Trigger signature operations for authorized accounts and retrieve finalized PDF documents.
Operational Monitoring — Verify API connectivity and monitor system health to ensure signature reliability.

The ShangQian / 上上签 (BestSign) MCP Server exposes 8 tools through the Vinkius. Connect it to Pydantic AI in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect ShangQian / 上上签 (BestSign) to Pydantic AI via MCP

Follow these steps to integrate the ShangQian / 上上签 (BestSign) MCP Server with Pydantic AI.

Install Pydantic AI

Run pip install pydantic-ai

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Run the agent

Save to agent.py and run: python agent.py

Explore tools

The agent discovers 8 tools from ShangQian / 上上签 (BestSign) with type-safe schemas

Why Use Pydantic AI with the ShangQian / 上上签 (BestSign) MCP Server

Pydantic AI provides unique advantages when paired with ShangQian / 上上签 (BestSign) through the Model Context Protocol.

Full type safety: every MCP tool response is validated against Pydantic models, catching data inconsistencies before they reach your application

Model-agnostic architecture. switch between OpenAI, Anthropic, or Gemini without changing your ShangQian / 上上签 (BestSign) integration code

Structured output guarantee: Pydantic AI ensures tool results conform to defined schemas, eliminating runtime type errors

Dependency injection system cleanly separates your ShangQian / 上上签 (BestSign) connection logic from agent behavior for testable, maintainable code

ShangQian / 上上签 (BestSign) + Pydantic AI Use Cases

Practical scenarios where Pydantic AI combined with the ShangQian / 上上签 (BestSign) MCP Server delivers measurable value.

Type-safe data pipelines: query ShangQian / 上上签 (BestSign) with guaranteed response schemas, feeding validated data into downstream processing

API orchestration: chain multiple ShangQian / 上上签 (BestSign) tool calls with Pydantic validation at each step to ensure data integrity end-to-end

Production monitoring: build validated alert agents that query ShangQian / 上上签 (BestSign) and output structured, schema-compliant notifications

Testing and QA: use Pydantic AI's dependency injection to mock ShangQian / 上上签 (BestSign) responses and write comprehensive agent tests

ShangQian / 上上签 (BestSign) MCP Tools for Pydantic AI (8)

These 8 tools become available when you connect ShangQian / 上上签 (BestSign) to Pydantic AI via MCP:

create_shangqian_contract

Create signature contract

get_contract_details

Get contract metadata

get_contract_download

Get download URL

get_user_certificate

Get user certificate

register_shangqian_user

sign_contract_now

Sign contract

upload_shangqian_template

Upload new template

verify_identity_v2

Verify user identity

Example Prompts for ShangQian / 上上签 (BestSign) in Pydantic AI

Ready-to-use prompts you can give your Pydantic AI agent to start working with ShangQian / 上上签 (BestSign) immediately.

"List all contract templates in my ShangQian account."

"Register a new enterprise user 'Vinkius' with account 'vinkius@example.com'."

"What is the status of contract '88210934'?"

Troubleshooting ShangQian / 上上签 (BestSign) MCP Server with Pydantic AI

Common issues when connecting ShangQian / 上上签 (BestSign) to Pydantic AI through the Vinkius, and how to resolve them.

MCPServerHTTP not found

Update: pip install --upgrade pydantic-ai

ShangQian / 上上签 (BestSign) + Pydantic AI FAQ

Common questions about integrating ShangQian / 上上签 (BestSign) MCP Server with Pydantic AI.

How does Pydantic AI discover MCP tools?

Create an MCPServerHTTP instance with the server URL. Pydantic AI connects, discovers all tools, and generates typed Python interfaces automatically.

Does Pydantic AI validate MCP tool responses?

Yes. When you define result types as Pydantic models, every tool response is validated against the schema. Invalid data raises a clear error instead of silently corrupting your pipeline.

Can I switch LLM providers without changing MCP code?

Absolutely. Pydantic AI abstracts the model layer. your ShangQian / 上上签 (BestSign) MCP integration works identically with OpenAI, Anthropic, Google, or any supported provider.