Sienge MCP by usefulapi MCP Server

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answering

Sienge MCP by usefulapi is answering right now. Last checked 8 min ago. It exposes 17 tools. Last commit 8 Nov 2026.

Read customers, sales contracts, receivables, purchase orders and units; create customers in Sienge.

Uptime history 18 hours of history

18 hours agonow

100.0%

Uptime 24h

66 of 66 checks

Tools

read from the server

286 ms

Response time

average over 24h

Stars

last commit 8 Nov 2026

Nothing serious here today

Today is the operative word: we check Sienge MCP by usefulapi every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add sienge --transport http https://sienge.usefulapi.io/mcp

Settings → Connectors → Add custom connector, then paste this address

https://sienge.usefulapi.io/mcp

~/.codex/config.toml

[mcp_servers.sienge]
url = "https://sienge.usefulapi.io/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "sienge": {
      "url": "https://sienge.usefulapi.io/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "sienge": {
      "type": "http",
      "url": "https://sienge.usefulapi.io/mcp"
    }
  }
}

Available tools 17

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

sienge

sienge_create_customer

Create a customer: a natural person (personType F, needs cpf and sex) or a legal person (personType J, needs cnpj). POST /customers. The call is never retried: check sienge_list_customers before you create the same customer again.

sienge_get_creditor

Show one creditor with its contacts, phones, address, bank data and tax classification. GET /creditors/{creditorId}.

sienge_get_customer

Show one customer with its phones, addresses, agents, procurators, spouse and family income. GET /customers/{customerId}.

sienge_get_purchase_order

Show one purchase order: status, supplier, building, totals and payment condition. GET /purchase-orders/{purchaseOrderId}.

sienge_get_sales_contract

Show one sales contract with its customers, units, payment conditions, brokers and commissions. GET /sales-contracts/{salesContractId}.

sienge_get_unit

Show one unit with its enterprise, areas, address, evaluations and groupings. GET /units/{unitId}.

sienge_list_companies

List the companies (business units) of the Sienge account, ordered by id. GET /companies.

sienge_list_creditors

List the creditors (suppliers and other payees), filtered by CPF, CNPJ or name. GET /creditors.

sienge_list_customers

List the customers of the Sienge account, ordered by id. Filter by CPF or CNPJ, enterprise, or create and change dates. GET /customers.

sienge_list_departments

List the departments of the account, optionally filtered by name or active state. GET /departments.

sienge_list_enterprises

List the enterprises (construction projects) of the account. Filter by company or type. GET /enterprises.

sienge_list_purchase_invoices

List purchase invoices (notas fiscais de compra) by issue period, company, supplier, document or number. GET /purchase-invoices.

sienge_list_purchase_orders

List purchase orders by order date, status, approval, supplier or building. GET /purchase-orders.

sienge_list_receivable_bills

List the receivable bills (accounts receivable titles) of one customer. GET /accounts-receivable/receivable-bills.

sienge_list_receivable_installments

List the installments (parcelas) of one receivable bill with due dates and amounts. GET /accounts-receivable/receivable-bills/{receivableBillId}/installments.

sienge_list_sales_contracts

List sales contracts, filtered by customer, company, enterprise, unit, number or dates. GET /sales-contracts.

sienge_list_units

List the real-estate units (imóveis) of the account, ordered by id descending. GET /units.

Endpoints

URL	Transport	State	Latency	Checked
https://sienge.usefulapi.io/mcp	streamable-http	answering	301 ms	8 min ago

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Sienge MCP by usefulapi — questions

Answers built from our own checks of this server.

What can Sienge MCP by usefulapi do?

It exposes 17 tools, read directly from the server on our last check. Among them: sienge_create_customer, sienge_get_creditor, sienge_get_customer, sienge_get_purchase_order, sienge_get_sales_contract, sienge_get_unit and 11 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Sienge MCP by usefulapi working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 66 of 66 checks got a reply (100.0%), average response time 286 ms. The bar chart above shows every period we have measured.

How do I connect Sienge MCP by usefulapi?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Sienge MCP by usefulapi need an API key?

No. Sienge MCP by usefulapi completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 17 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Sienge MCP by usefulapi?

It answers our handshake in 286 ms on average, which is faster than 49% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Sienge MCP by usefulapi open source?

The code is open source: it is published under the MIT licence, written in JavaScript, 1 stars on GitHub and 1 open issue. The licence covers the code in the repository, not the hosted service at sienge.usefulapi.io, which runs on its operator's own terms.