How do I find my eSign App ID and Secret?

Log in to the [eSign Open Platform](https://open.esign.cn/), 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.

eSign (e签宝) MCP Server for Google ADK 10 tools — connect in under 2 minutes

Name: eSign (e签宝)
Availability: InStock
Author: Vinkius

google.github.io/adk-docs/tools/mcp-tools

Built by Vinkius GDPR 10 Tools SDK

Google Agent Development Kit (ADK) is Google's framework for building production AI agents. Add eSign (e签宝) as an MCP tool provider through Vinkius and your ADK agents can call every tool with full schema introspection.

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

from google.adk.agents import Agent
from google.adk.tools.mcp_tool import McpToolset
from google.adk.tools.mcp_tool.mcp_session_manager import (
    StreamableHTTPConnectionParams,
)

# Your Vinkius token. get it at cloud.vinkius.com
mcp_tools = McpToolset(
    connection_params=StreamableHTTPConnectionParams(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
    )
)

agent = Agent(
    model="gemini-2.5-pro",
    name="esign_e_agent",
    instruction=(
        "You help users interact with eSign (e签宝) "
        "using 10 available tools."
    ),
    tools=[mcp_tools],
)

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 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.

Google ADK natively supports eSign (e签宝) as an MCP tool provider. declare Vinkius Edge URL and the framework handles discovery, validation, and execution automatically. Combine 10 tools with Gemini's long-context reasoning for complex multi-tool workflows, with production-ready session management and evaluation built in.

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.

The eSign (e签宝) MCP Server exposes 10 tools through the Vinkius. Connect it to Google ADK 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 eSign (e签宝) to Google ADK via MCP

Follow these steps to integrate the eSign (e签宝) MCP Server with Google ADK.

Install Google ADK

Run pip install google-adk

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Create the agent

Save the code above and integrate into your ADK workflow

Explore tools

The agent will discover 10 tools from eSign (e签宝) via MCP

Why Use Google ADK with the eSign (e签宝) MCP Server

Google ADK provides unique advantages when paired with eSign (e签宝) through the Model Context Protocol.

Google ADK natively supports MCP tool servers. declare a tool provider and the framework handles discovery, validation, and execution

Built on Gemini models, ADK provides long-context reasoning ideal for complex multi-tool workflows with eSign (e签宝)

Production-ready features like session management, evaluation, and deployment come built-in. not bolted on

Seamless integration with Google Cloud services means you can combine eSign (e签宝) tools with BigQuery, Vertex AI, and Cloud Functions

eSign (e签宝) + Google ADK Use Cases

Practical scenarios where Google ADK combined with the eSign (e签宝) MCP Server delivers measurable value.

Enterprise data agents: ADK agents query eSign (e签宝) and cross-reference results with internal databases for comprehensive analysis

Multi-modal workflows: combine eSign (e签宝) tool responses with Gemini's vision and language capabilities in a single agent

Automated compliance checks: schedule ADK agents to query eSign (e签宝) regularly and flag policy violations or configuration drift

Internal tool platforms: build self-service agent platforms where teams connect their own MCP servers including eSign (e签宝)

eSign (e签宝) MCP Tools for Google ADK (10)

These 10 tools become available when you connect eSign (e签宝) to Google ADK via MCP:

add_docs

Add documents to flow

add_signers

Add signers to flow

create_sign_flow

Create a new sign flow

download_docs

Download flow documents

get_execute_url

Get signature URL

get_org_info

Get organization details

get_sign_flow

Get sign flow details

list_sign_flows

List sign flows

list_templates

List sign templates

start_flow

Start sign flow

Example Prompts for eSign (e签宝) in Google ADK

Ready-to-use prompts you can give your Google ADK agent to start working with eSign (e签宝) immediately.

"List all active signature flows on eSign."

"Get the signing URL for account 'acc-8821' in flow 'flow-9920'."

"Show me all available document templates."

Troubleshooting eSign (e签宝) MCP Server with Google ADK

Common issues when connecting eSign (e签宝) to Google ADK through the Vinkius, and how to resolve them.

McpToolset not found

Update: pip install --upgrade google-adk

eSign (e签宝) + Google ADK FAQ

Common questions about integrating eSign (e签宝) MCP Server with Google ADK.

How does Google ADK connect to MCP servers?

Import the MCP toolset class and pass the server URL. ADK discovers and registers all tools automatically, making them available to your agent's tool-use loop.

Can ADK agents use multiple MCP servers?

Yes. Declare multiple MCP tool providers in your agent configuration. ADK merges all tool schemas and the agent can call tools from any server in a single turn.

Which Gemini models work best with MCP tools?

Gemini 2.0 Flash and Pro models both support function calling required for MCP tools. Flash is recommended for latency-sensitive use cases, Pro for complex reasoning.