Bring Contract Lifecycle
to LangChain
Create your Vinkius account to connect eSign (e签宝) to LangChain and start using all 10 AI tools in minutes. Fully managed, enterprise secure, and ready to use without writing a single line of code. No hosting, no server setup — just connect and start using.
GDPR Free for SubscribersCompatible with every major AI agent and IDE
Gemini
What is the eSign (e签宝) MCP Server?
Empower your AI agent to orchestrate your digital agreement lifecycle with eSign (e签宝), the premier electronic signature platform in China. By connecting eSign to your agent, you transform complex contract workflows and document signing into a natural conversation. Your agent can instantly list your sign flows, create new signature tasks, manage document templates, and even retrieve signing URLs for participants without you ever needing to navigate the comprehensive eSign portal. Whether you are managing high-volume employee contracts or complex B2B agreements, your agent acts as a real-time legal operations assistant, keeping your documents secure and your business moving.
What you can do
- Sign Flow Orchestration — Create and manage digital signature workflows with full support for documents and signers.
- Template Management — Browse predefined document templates to accelerate your contract production.
- Signature Tracking — Monitor the real-time status of active sign flows and retrieve execution URLs for participants.
- Document Control — Add PDF documents to signature tasks and retrieve download links for completed agreements.
- Organization Insights — Retrieve high-level information about your enterprise eSign account and authorization status.
How it works
- Subscribe to this server
- Enter your eSign App ID and App Secret
- Start managing your digital agreements through Claude, Cursor, or any MCP-compatible client
Who is this for?
- Legal Operations — automate contract creation and monitor signing progress through natural language queries.
- HR Managers — manage employment contracts and internal policy acknowledgments directly from your AI-powered workspace.
- Sales Operations — coordinate B2B agreements and monitor client signatures via a unified AI interface.
- Enterprise Leaders — get real-time insights into organization-wide document execution and compliance status.
Built-in capabilities (10)
Add documents to flow
Add signers to flow
Create a new sign flow
Download flow documents
Get signature URL
Get organization details
Get sign flow details
List sign flows
List sign templates
Start sign flow
Why LangChain?
LangChain's ecosystem of 500+ components combines seamlessly with eSign (e签宝) through native MCP adapters. Connect 10 tools via Vinkius and use ReAct agents, Plan-and-Execute strategies, or custom agent architectures. with LangSmith tracing giving full visibility into every tool call, latency, and token cost.
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The largest ecosystem of integrations, chains, and agents. combine eSign (e签宝) MCP tools with 500+ LangChain components
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Agent architecture supports ReAct, Plan-and-Execute, and custom strategies with full MCP tool access at every step
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LangSmith tracing gives you complete visibility into tool calls, latencies, and token usage for production debugging
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Memory and conversation persistence let agents maintain context across eSign (e签宝) queries for multi-turn workflows
eSign (e签宝) in LangChain
Why run eSign (e签宝) with Vinkius?
The eSign (e签宝) connection runs on our fully managed, secure cloud infrastructure. We handle the hosting, maintenance, and security so you don't have to deal with servers or code. All 10 tools are ready to work instantly without any complex setup.
You stay in complete control of your data. Your AI only accesses the information you approve, keeping your sensitive passwords and private details completely safe. Plus, with automatic optimizations, your AI works faster and more efficiently.
* Every connection is hosted and maintained by Vinkius. We handle the security, updates, and infrastructure so you don't have to write code or manage servers. See our infrastructure
Over 4,000 integrations ready for AI agents
Explore a vast library of pre-built integrations, optimized and ready to deploy.
Connect securely in under 30 seconds
Generate tokens to authenticate and link external services in a single step.
Complete visibility into every agent action
Audit live requests, latency, success rates, and active security compliance policies.
Optimize spending and track token ROI
Analyze real-time token consumption and cost metrics detailed by connection.
Explore our live AI Agents Analytics dashboard to see it all working
This dashboard is included when you connect eSign (e签宝) using Vinkius. You will never be left in the dark about what your AI agents are doing with your tools.
eSign (e签宝) and 4,000+ other AI tools. No hosting, no code, ready to use.
Professionals who connect eSign (e签宝) to LangChain through Vinkius don't need to write code, manage servers, or worry about security. Everything is pre-configured, secure, and runs automatically in the background.
Raw MCP | Vinkius | |
|---|---|---|
| Ready-to-use MCPs | Find and configure each manually | 4,000+ MCPs ready to use |
| Connection Setup | Manual coding & server setup | 1-click instant connection |
| Server Hosting | You host it yourself (needs 24/7 uptime) | 100% hosted & managed by Vinkius |
| Security & Privacy | Stored in plaintext config files | Bank-grade encrypted vault |
| Activity Visibility | Blind execution (no logs or tracking) | Live dashboard with real-time logs |
| Cost Control | Runaway AI token spend risk | Automatic budget limits |
| Revoking Access | Must delete files or code to stop | 1-click disconnect button |
How Vinkius secures
eSign (e签宝) for LangChain
Every request between LangChain and eSign (e签宝) is protected by our secure gateway. We automatically keep your sensitive data private, prevent unauthorized access, and let you disconnect instantly at any time.
Frequently asked questions
How do I find my eSign App ID and Secret?
Log in to the eSign Open Platform, create a new application, and you will find your App ID and App Secret in the application credentials section.
Can I retrieve the signing URL for a participant?
Yes. Use the get_execute_url tool with the flow ID and the signer's account ID. Your agent will retrieve the unique URL where the participant can perform the signature.
Is it possible to download the signed documents?
Yes! Once a sign flow is completed, you can use the download_docs tool to retrieve temporary download links for all documents included in that flow.
How does LangChain connect to MCP servers?
Use langchain-mcp-adapters to create an MCP client. LangChain discovers all tools and wraps them as native LangChain tools compatible with any agent type.
Which LangChain agent types work with MCP?
All agent types including ReAct, OpenAI Functions, and custom agents work with MCP tools. The tools appear as standard LangChain tools after the adapter wraps them.
Can I trace MCP tool calls in LangSmith?
Yes. All MCP tool invocations appear as traced steps in LangSmith, showing input parameters, response payloads, latency, and token usage.
MultiServerMCPClient not found
Install: pip install langchain-mcp-adapters
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