Sellsy MCP by usefulapi

MCP server · hosted · v1.1.0 · io.usefulapi/sellsy

Online · tested 2h agoNEW · 2h agoNew version 54m agoSeen in the registry 9m ago

Search and read Sellsy companies, contacts, opportunities, invoices and tasks; create records.

What it does

Sellsy MCP by usefulapi is an MCP server, a connector that lets an AI assistant use it as a tool. It is hosted: an assistant connects to it over the internet, nothing to install.

From the publisher's description, Electra Index matched it to one capability: invoicing. That makes it a candidate for tasks such as send and chase invoices.

Facts come from the Official MCP Registry, as declared by the publisher. Capabilities are matched automatically (low confidence). None of this is a test of the tool.

At a glance

Hosted (remote)YES

Local installNO

Live checkOnline · 44 tools

Version1.1.0

PriceNot in the registry

First seen25 Oct 2026

Last checked9m ago

How to connect

As declared in the Official MCP Registry · hosted endpoint tested by Electra Index 2h ago (live check)

Hosted endpoint

https://sellsy.usefulapi.io/mcp streamable-http

In Claude Code: claude mcp add --transport http sellsy-mcp-by-usefulapi https://sellsy.usefulapi.io/mcp

MCP settings (Claude Desktop, Cursor and other MCP clients)

{
  "mcpServers": {
    "sellsy-mcp-by-usefulapi": {
      "url": "https://sellsy.usefulapi.io/mcp"
    }
  }
}

Live check

Electra Index connected to the hosted endpoint 2h ago

ONLINE Sellsy MCP by usefulapi answered an MCP connection on 25 Oct 2026 and introduced itself as sellsy-mcp 1.0.0 (MCP protocol 2025-06-18).

44 tools offered to AI assistants

sellsy_search · Free-text search over companies, individuals, contacts, opportunities, items, documents and staff in one call (GET /search). Use it to find a record by name, email or number when you do not know its type. Needs the search.read scope.
sellsy_list_companies · List companies (customers, prospects, suppliers) with paging. Needs companies.read.
sellsy_search_companies · Search companies by name, email, type (prospect/client/supplier), reference, VAT, SIRET, country, postal code, creation or update date. Needs companies.read.
sellsy_get_company · Get one company by id. Needs companies.read.
sellsy_list_company_contacts · List the contacts linked to one company (GET /companies/{id}/contacts). Needs companies.read and contacts.read.
sellsy_list_individuals · List individuals (private customers, prospects, suppliers) with paging. Needs individuals.read.
sellsy_search_individuals · Search individuals by name, email, type, reference, country, postal code, creation or update date. Needs individuals.read.
sellsy_get_individual · Get one individual by id. Needs individuals.read.
sellsy_list_contacts · List contacts (people at companies) with paging. Needs contacts.read.
sellsy_search_contacts · Search contacts by last name, email, phone, linked company or individual, creation date. Needs contacts.read.
sellsy_get_contact · Get one contact by id. Needs contacts.read.
sellsy_list_opportunities · List sales opportunities with paging. Needs opportunities.read.

Show 32 more

sellsy_search_opportunities · Search opportunities by name, number, pipeline, step, status (open/won/lost/cancelled/closed/late), amount, owner or due date. Needs opportunities.read.
sellsy_get_opportunity · Get one opportunity by id. Needs opportunities.read.
sellsy_list_opportunity_pipelines · List the sales pipelines (needed to create an opportunity: pipeline id and step id). Needs opportunities.read.
sellsy_list_pipeline_steps · List the steps of one opportunity pipeline. Needs opportunities.read.
sellsy_list_estimates · List estimates (quotes) with paging. Needs estimates.read.
sellsy_search_estimates · Search estimates by status, number, date, currency, owner, contact or related company/individual/opportunity. Needs estimates.read.
sellsy_get_estimate · Get one estimate by id, with its rows and amounts. Needs estimates.read.
sellsy_list_invoices · List invoices with paging. Needs invoices.read.
sellsy_search_invoices · Search invoices by status (draft/due/payinprogress/paid/late/cancelled), number, date, currency, owner, or related company/individual/opportunity. Use it for unpaid or late invoices. Needs invoices.read.
sellsy_get_invoice · Get one invoice by id, with its rows, amounts and status. Needs invoices.read.
sellsy_list_invoice_payments · List the payments linked to one invoice. Needs invoices.read and payments.read.
sellsy_list_orders · List orders with paging. Needs orders.read.
sellsy_search_orders · Search orders by status or delivery status, or related company/individual/opportunity. Needs orders.read.
sellsy_get_order · Get one order by id. Needs orders.read.
sellsy_list_credit_notes · List credit notes with paging. Needs credit-notes.read.
sellsy_get_credit_note · Get one credit note by id. Needs credit-notes.read.
sellsy_list_items · List catalog items (products, services, shipping, packaging) with paging. Needs items.read.
sellsy_search_items · Search catalog items by name, reference or type. Needs items.read.
sellsy_get_item · Get one catalog item by id. Needs items.read.
sellsy_search_payments · Search payments by status (pending/confirmed/rejected/failed/refund) or related company/individual. Needs payments.read.
sellsy_list_tasks · List tasks with paging. Needs tasks.read.
sellsy_search_tasks · Search tasks by status (todo/done), owner, assignee, label, due date or related record. Needs tasks.read.
sellsy_get_task · Get one task by id. Needs tasks.read.
sellsy_list_task_labels · List the task labels (a label id is required to create a task). Needs tasks.read.
sellsy_search_comments · Search comments and notes by author, date, parent comment or the company/individual/contact they are attached to. Needs comments.read.
sellsy_list_staffs · List the staff members of the account (the list may hold only yourself, depending on the Sellsy plan). Needs staffs.read.
sellsy_create_company · WRITE: create a company record in Sellsy (a prospect, client or supplier). Needs companies.write. Nothing is sent to the company.
sellsy_create_individual · WRITE: create an individual (a private person as prospect, client or supplier) in Sellsy. Needs individuals.write.
sellsy_create_contact · WRITE: create a contact (a person) in Sellsy. It is not linked to a company by this call. Needs contacts.write.
sellsy_create_opportunity · WRITE: create a sales opportunity linked to a company, individual or contact. Needs a pipeline id and one of its step ids (see sellsy_list_opportunity_pipelines and sellsy_list_pipeline_steps). Needs opportunities.write.
sellsy_create_comment · WRITE: add a comment (note) to a company, individual, contact, opportunity or document. Visible to the Sellsy staff, not sent to the customer. Needs comments.write.
sellsy_create_task · WRITE: create a task, optionally attached to a record and assigned to staff. Needs a label id (see sellsy_list_task_labels) and a due date-time. Needs tasks.write.

What "online" means: the server answered an MCP connection at the time of the check. It is not a guarantee of security, quality or continuous uptime. How we test: we open an MCP session and ask for the tool list, as an AI assistant would. We never run a tool and never send a key. Checked every few days. Method

Is this your server? Monitoring Pro: a check every 30 minutes and an email within the hour when it stops answering. Launch offer: $39.99 once, for life.

Tasks it helps with

Share of each task's required capabilities it covers

Send and chase invoices

Invoicing

50%

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Read Sarbacane campaigns, stats, lists and blacklists; manage contacts and draft email campaigns

Ready-made AI agents

An MCP server is a connector you add to your own assistant. These are finished products that do the same job for you:

Booke AI51
$129/mo
Xelix32
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Apollo.io90
$49/mo · free plan

Facts & evidence

Each fact shows where it was seen and when.

Fact	Value	Evidence	Source	Last confirmed
Version	1.1.0	DECLARED	SRC-001 Official MCP Registry	9m ago
Hosted endpoint	https://sellsy.usefulapi.io/mcp	DECLARED	SRC-001 Official MCP Registry	9m ago
Local install (package)	no	DECLARED	SRC-001 Official MCP Registry	9m ago
Remote access (hosted)	yes	DECLARED	SRC-001 Official MCP Registry	9m ago
Website	https://usefulapi.io/sellsy/	DECLARED	SRC-001 Official MCP Registry	9m ago
Repository	https://github.com/m190/usefulapi-mcp	DECLARED	SRC-001 Official MCP Registry	9m ago
Registry status	active	DECLARED	SRC-001 Official MCP Registry	9m ago
MCP server	yes	DECLARED	SRC-001 Official MCP Registry	9m ago

Change history

VERSION25 Oct 2026
1.0.0 → 1.1.0
NEW25 Oct 2026
first seen in the index

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Questions about Sellsy MCP by usefulapi

How do I connect Sellsy MCP by usefulapi?

Use the hosted endpoint https://sellsy.usefulapi.io/mcp in your assistant's MCP settings. The exact settings are in "How to connect" above, as declared in the Official MCP Registry.

What tools does Sellsy MCP by usefulapi offer?

When Electra Index connected on 25 Oct 2026, it listed 44 tools: sellsy_search, sellsy_list_companies, sellsy_search_companies, sellsy_get_company, sellsy_list_company_contacts, sellsy_list_individuals, sellsy_search_individuals, sellsy_get_individual and more. The full list is in "Live check" above.

Is Sellsy MCP by usefulapi online?

Yes. Its hosted endpoint answered an MCP connection from Electra Index 2h ago.

What can I use Sellsy MCP by usefulapi for?

Based on its description, it is most relevant to: send and chase invoices.