Is an API Key required for isvat?

No. isvat is a free and public service. This server works out of the box without any static credentials required.

Which countries are supported?

isvat supports VAT validation for all countries within the European Union (EU).

Does the agent retrieve company addresses?

The isvat API primarily returns a boolean validation status. For detailed company metadata, including names and addresses, consider using the `VATNode` or `BrasilAPI` servers.

isvat MCP Server for LlamaIndex 3 tools — connect in under 2 minutes

Name: isvat
Availability: InStock
Author: Vinkius

docs.llamaindex.ai/en/stable/module_guides/tools/mcp

Built by Vinkius GDPR 3 Tools Framework

LlamaIndex specializes in data-aware AI agents that connect LLMs to structured and unstructured sources. Add isvat as an MCP tool provider through Vinkius and your agents can query, analyze, and act on live data alongside your existing indexes.

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 llama_index.tools.mcp import BasicMCPClient, McpToolSpec
from llama_index.core.agent.workflow import FunctionAgent
from llama_index.llms.openai import OpenAI

async def main():
    # Your Vinkius token. get it at cloud.vinkius.com
    mcp_client = BasicMCPClient("https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp")
    mcp_tool_spec = McpToolSpec(client=mcp_client)
    tools = await mcp_tool_spec.to_tool_list_async()

    agent = FunctionAgent(
        tools=tools,
        llm=OpenAI(model="gpt-4o"),
        system_prompt=(
            "You are an assistant with access to isvat. "
            "You have 3 tools available."
        ),
    )

    response = await agent.run(
        "What tools are available in isvat?"
    )
    print(response)

asyncio.run(main())

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About isvat MCP Server

Empower your AI agent to orchestrate your entire European VAT validation workflow with isvat, the simple and fast API for tax ID verification. By connecting isvat to your agent, you transform complex VAT lookups into a natural conversation. Your agent can instantly verify if a European VAT number is valid without you ever touching a manual lookup tool. Whether you are conducting financial due diligence or managing international invoicing, your agent acts as a real-time compliance assistant, ensuring your tax data is always verified.

LlamaIndex agents combine isvat tool responses with indexed documents for comprehensive, grounded answers. Connect 3 tools through Vinkius and query live data alongside vector stores and SQL databases in a single turn. ideal for hybrid search, data enrichment, and analytical workflows.

What you can do

VAT Auditing — Verify if any European VAT number is valid and retrieve immediate confirmation status.
Batch Oversight — Validate multiple VAT numbers simultaneously to maintain strict control over large contact lists.
Compliance Intelligence — Identify valid tax IDs for businesses across the European Union to assist in financial auditing.
Operational Monitoring — Check API status to ensure your verification workflow is always operational.

The isvat MCP Server exposes 3 tools through the Vinkius. Connect it to LlamaIndex 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 isvat to LlamaIndex via MCP

Follow these steps to integrate the isvat MCP Server with LlamaIndex.

Install dependencies

Run pip install llama-index-tools-mcp llama-index-llms-openai

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 3 tools from isvat

Why Use LlamaIndex with the isvat MCP Server

LlamaIndex provides unique advantages when paired with isvat through the Model Context Protocol.

Data-first architecture: LlamaIndex agents combine isvat tool responses with indexed documents for comprehensive, grounded answers

Query pipeline framework lets you chain isvat tool calls with transformations, filters, and re-rankers in a typed pipeline

Multi-source reasoning: agents can query isvat, a vector store, and a SQL database in a single turn and synthesize results

Observability integrations show exactly what isvat tools were called, what data was returned, and how it influenced the final answer

isvat + LlamaIndex Use Cases

Practical scenarios where LlamaIndex combined with the isvat MCP Server delivers measurable value.

Hybrid search: combine isvat real-time data with embedded document indexes for answers that are both current and comprehensive

Data enrichment: query isvat to augment indexed data with live information before generating user-facing responses

Knowledge base agents: build agents that maintain and update knowledge bases by periodically querying isvat for fresh data

Analytical workflows: chain isvat queries with LlamaIndex's data connectors to build multi-source analytical reports

isvat MCP Tools for LlamaIndex (3)

These 3 tools become available when you connect isvat to LlamaIndex via MCP:

check_api_status

Check if the isvat API is operational

validate_eu_vat

Verify if a European VAT number is valid

validate_multiple_vat

Verify multiple European VAT numbers

Example Prompts for isvat in LlamaIndex

Ready-to-use prompts you can give your LlamaIndex agent to start working with isvat immediately.

"Validate the European VAT number 'DE123456789' using isvat."

"Check if French VAT 'FR12345678901' is valid."

"Verify multiple VAT numbers: DE123, FR456."

Troubleshooting isvat MCP Server with LlamaIndex

Common issues when connecting isvat to LlamaIndex through the Vinkius, and how to resolve them.

BasicMCPClient not found

Install: pip install llama-index-tools-mcp

isvat + LlamaIndex FAQ

Common questions about integrating isvat MCP Server with LlamaIndex.

How does LlamaIndex connect to MCP servers?

Use the MCP client adapter to create a connection. LlamaIndex discovers all tools and wraps them as query engine tools compatible with any LlamaIndex agent.