# Sellsy Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## Sellsy

Search and manage customers, invoices, opportunities and tasks in your Sellsy CRM

- Record: https://musedirectory.ai/connector/sellsy
- Category: Productivity
- Developer: usefulapi (https://usefulapi.io/sellsy/)
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 2245ms, checked 2026-10-30T00:26:25Z
- Endpoint: https://sellsy.usefulapi.io/mcp
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-10-30T00:26:25Z)
- Source: Found in the official MCP Registry (io.usefulapi/sellsy) https://registry.modelcontextprotocol.io/v0/servers?search=io.usefulapi%2Fsellsy

Connects to Sellsy CRM to search and read companies, contacts, opportunities, invoices, estimates, orders and tasks. Create new company and individual records. Requires Sellsy account and API credentials.

Example request: "Show me all unpaid invoices from this month and which customers they're from"

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Sellsy to help me. It is a free service with an MCP server at https://sellsy.usefulapi.io/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.

Tools:
- 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.
- 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.

Screening checks:
- MCP handshake: pass (Answered in 2245ms)
- Domain against threat feeds (Cloudflare security DNS): pass (sellsy.usefulapi.io, usefulapi.io not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: pass (44 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (No redirects off the domain)
- AI review of purpose and tool behavior: pass (No concerns)