Can my AI agent issue a SII-compliant electronic invoice (factura electrónica) directly?

Yes! Use the `create_document` tool with the appropriate document type ID (factura, boleta, etc.), office ID, and line item details. Bsale automatically validates and transmits the document to Chile's SII for electronic stamping.

How can I check the stock level of a specific product variant across all my stores?

Use the `list_stocks` tool with the variant ID as a filter. It will return the current available quantity for that SKU across every office branch configured in your Bsale account, giving you instant cross-store visibility.

Can I register a new client with their RUT for tax compliance before issuing an invoice?

Absolutely. Use the `create_client` tool with the client's name, RUT (in the code field), and business activity (giro). Once created, you can immediately reference their client ID when issuing documents through the `create_document` tool.

Bsale MCP Server for LangChain 15 tools — connect in under 2 minutes

Name: Bsale
Availability: InStock
Author: Vinkius

python.langchain.com/docs/integrations/tools/mcp

Built by Vinkius GDPR 15 Tools Framework

LangChain is the leading Python framework for composable LLM applications. Connect Bsale through Vinkius and LangChain agents can call every tool natively. combine them with retrievers, memory, and output parsers for sophisticated AI pipelines.

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 langchain_mcp_adapters.client import MultiServerMCPClient
from langchain_openai import ChatOpenAI
from langgraph.prebuilt import create_react_agent

async def main():
    # Your Vinkius token. get it at cloud.vinkius.com
    async with MultiServerMCPClient({
        "bsale": {
            "transport": "streamable_http",
            "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
        }
    }) as client:
        tools = client.get_tools()
        agent = create_react_agent(
            ChatOpenAI(model="gpt-4o"),
            tools,
        )
        response = await agent.ainvoke({
            "messages": [{
                "role": "user",
                "content": "Using Bsale, show me what tools are available.",
            }]
        })
        print(response["messages"][-1].content)

asyncio.run(main())

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* 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 Bsale MCP Server

Connect your Bsale cloud POS account to any AI agent and take full control of your Chilean retail and invoicing operations through natural conversation.

LangChain's ecosystem of 500+ components combines seamlessly with Bsale through native MCP adapters. Connect 15 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.

What you can do

Electronic Document Emission — Issue SII-compliant boletas, facturas electrónicas, credit notes, and dispatch guides directly through your AI agent
Product Catalog Management — Browse, search, and create products with full variant (SKU) support, pricing tiers, and web descriptions
Inventory & Stock Control — Check real-time stock levels across all office branches and track variant-level availability
Client Registry — Search, inspect, and register customers with RUT, business activity (giro), and contact details for tax compliance
Configuration Intelligence — Query your document types, payment methods, price lists, and office configurations instantly

The Bsale MCP Server exposes 15 tools through the Vinkius. Connect it to LangChain 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 Bsale to LangChain via MCP

Follow these steps to integrate the Bsale MCP Server with LangChain.

Install dependencies

Run pip install langchain langchain-mcp-adapters langgraph langchain-openai

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Run the agent

Save the code and run python agent.py

Explore tools

The agent discovers 15 tools from Bsale via MCP

Why Use LangChain with the Bsale MCP Server

LangChain provides unique advantages when paired with Bsale through the Model Context Protocol.

The largest ecosystem of integrations, chains, and agents. combine Bsale MCP tools with 500+ LangChain components

Agent architecture supports ReAct, Plan-and-Execute, and custom strategies with full MCP tool access at every step

LangSmith tracing gives you complete visibility into tool calls, latencies, and token usage for production debugging

Memory and conversation persistence let agents maintain context across Bsale queries for multi-turn workflows

Bsale + LangChain Use Cases

Practical scenarios where LangChain combined with the Bsale MCP Server delivers measurable value.

RAG with live data: combine Bsale tool results with vector store retrievals for answers grounded in both real-time and historical data

Autonomous research agents: LangChain agents query Bsale, synthesize findings, and generate comprehensive research reports

Multi-tool orchestration: chain Bsale tools with web scrapers, databases, and calculators in a single agent run

Production monitoring: use LangSmith to trace every Bsale tool call, measure latency, and optimize your agent's performance

Bsale MCP Tools for LangChain (15)

These 15 tools become available when you connect Bsale to LangChain via MCP:

create_client

The client can then be associated with future invoices and sales documents. For Chilean tax compliance, include the RUT and business activity (giro) when available. Register a new client in the system

create_document

Requires the document type ID and at minimum one line item with product details. The document is automatically sent to the Chilean SII (Servicio de Impuestos Internos) for validation. Issue a new electronic tax document

create_product

The product will be available for inclusion in future documents and can be associated with variants (SKUs), price lists, and stock management across multiple offices. Create a new product in the catalog

get_client

Get full details of a specific client

get_document

Get full details of a specific tax document

get_product

Get full details of a specific product

list_clients

Use limit and offset for pagination. List all registered clients

list_document_types

List available SII document types

list_documents

Documents are returned with their SII-compliant folio numbers, emission dates, and net/tax/total breakdowns. Use optional limit and offset parameters for pagination. List tax documents (invoices, boletas, credit notes)

list_offices

List all office branches and locations

list_payment_types

List accepted payment methods

list_price_lists

g., retail, wholesale, distributor). Each price list can have different pricing for the same product variants. List all configured price lists

list_products

Use limit and offset for paginated browsing of large catalogs. List all products and services in your catalog

list_stocks

Returns available quantities per location. Check stock levels across offices

list_variants

Each variant has its own barcode, cost, and pricing configuration across different price lists. List all SKU variants for a product

Example Prompts for Bsale in LangChain

Ready-to-use prompts you can give your LangChain agent to start working with Bsale immediately.

"Show me the last 10 invoices issued in my Bsale account."

"Check stock levels for all variants of product ID 1542."

"Register a new client 'Distribuidora Los Andes Ltda' with RUT 76.543.210-K."

Troubleshooting Bsale MCP Server with LangChain

Common issues when connecting Bsale to LangChain through the Vinkius, and how to resolve them.

MultiServerMCPClient not found

Install: pip install langchain-mcp-adapters

Bsale + LangChain FAQ

Common questions about integrating Bsale MCP Server with LangChain.

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.