How to Use the Pappers MCP in Mastra AI

Q: How do I register the Pappers MCP Server within Mastra AI?

Install @mastra/mcp@latest and initialize the client with your Vinkius credentials. Call mcpClient.listTools() and spread those tools directly into your Mastra agent configuration to give it instant registry access.

Q: How do I require human approval for Pappers document downloads in Mastra AI?

Use Mastra's human-in-the-loop feature. Set requireToolApproval on the getcompanydocument tool so the agent must wait for manual sign-off before pulling corporate registry PDFs.

Build resilient French corporate due diligence workflows using Mastra AI and the Pappers MCP Server.

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Connect Pappers MCP to Mastra AI

Create your Vinkius account to connect Pappers to Mastra AI — we handle the hosting, security, and runtime updates so you don't have to. No server setup required.

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Setup Pappers with Mastra AI

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Automated Multi-Step KYC Workflows

Compliance pipelines shouldn't break when a registry API rate limit hits. Your Mastra AI agents use automated retries and backoffs while calling `search_ultimate_beneficial_owners` to map out complex French corporate structures without failing. If a beneficial owner search returns a corporate entity instead of a person, the Mastra workflow branches dynamically. The agent automatically triggers `get_french_company_details` on the parent company to trace the ownership chain to the very top.

Human-in-the-Loop Document Approvals

Some corporate filings are too critical to trust to pure automation. Mastra AI lets you set `requireToolApproval` on high-risk actions like `get_company_document` to pause the agent until an analyst approves the API call. Once the compliance officer clicks approve, the Mastra agent resumes, fetching the official articles of association. This keeps your team in control while automating the tedious registry navigation.

Resilient Monitoring via Pappers MCP Server

Keep your database updated without writing custom cron jobs. Your Mastra AI workflow can schedule checks using `list_monitored_companies` to track changes in corporate filings automatically. Should a monitored French business file a new bankruptcy or merger, the Pappers MCP Server flags the change. Mastra then triggers your notification branch, alerting your legal team immediately through your configured channels.

Setup guide

Set up Pappers MCP in Mastra AI

Prerequisites

Node.js 18+ and a TypeScript project
@mastra/mcp + @mastra/core packages
Active Vinkius subscription with a valid endpoint token

1

Install dependencies
Run npm install @mastra/mcp @mastra/core plus your preferred model provider (e.g. @ai-sdk/openai).
2

Configure the MCPClient
Create an MCPClient with your Vinkius endpoint as a URL object. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Discover and inject tools
Call mcpClient.listTools() and spread the result into your agent's tools object. All Pappers tools become native Mastra tools.
4

Run with any model
Swap openai("gpt-4o") for any AI SDK-compatible provider. Call agent.generate() and the agent routes tool calls through MCP automatically.

agent.ts

import { MCPClient } from "@mastra/mcp";
import { Agent } from "@mastra/core/agent";
import { openai } from "@ai-sdk/openai";

const mcpClient = new MCPClient({
  id: "pappers-mcp-client",
  servers: {
    "pappers-mcp": {
      url: new URL(
        "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
      ),
    },
  },
});

const agent = new Agent({
  name: "Pappers Agent",
  model: openai("gpt-4o"),
  instructions: "You have access to Pappers tools.",
  tools: {
    ...(await mcpClient.listTools()),
  },
});

const result = await agent.generate(
  "List recent Pappers transactions"
);
console.log(result.text);

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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 Pappers. 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 Pappers MCP in Mastra AI

Install `@mastra/mcp@latest` and initialize the client with your Vinkius credentials. Call `mcpClient.listTools()` and spread those tools directly into your Mastra agent configuration to give it instant registry access.

Yes, Mastra's workflow engine features built-in exponential backoff. If `get_company_financials` hits a rate limit, the workflow automatically pauses and retries the Pappers query without crashing your compliance pipeline.

Use Mastra's human-in-the-loop feature. Set `requireToolApproval` on the `get_company_document` tool so the agent must wait for manual sign-off before pulling corporate registry PDFs.

Yes, Mastra automatically detects the transport layer. It connects to the Pappers MCP Server using either standard SSE or Streamable HTTP, letting you deploy your agents to any cloud.

All registry lookups, including sensitive ultimate beneficial owner data, pass through an ephemeral, zero-trust sandbox. No corporate data is cached or stored permanently on the Vinkius hosting layer.

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