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Connectors / Sales · HTTP Connector
Automate Sellsy with Tray.ai
Create a company, create a contact and create an opportunity in Sellsy. Connect Sellsy to the rest of your sales stack with Tray.ai.
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What can you do with Sellsy on Tray.ai?
Sellsy is a French business suite for small companies that combines a CRM with quotes, invoicing, payments, and pre-accounting. Tray.ai connects to Sellsy through the HTTP Connector, so your workflows can call the Sellsy API alongside the rest of your stack.
- Create an invoice in Sellsy when a project is marked complete in your project tracker.
- Create a contact for each new web form lead so sales can follow up.
- Update an opportunity when a quote is signed in your e-signature tool.
- Create a task for the account owner when a support ticket is escalated in your help desk.
- Connects through
- HTTP Connector
- Authentication
- OAuth 2.0
- Base URL
- https://api.sellsy.com/v2
What the Sellsy API covers
6 resources and 22 documented actions, each one a call the HTTP Connector can make from a Tray.ai workflow.
Companies
- List companies
- Create a company
- Update a company
- Delete a company
Contacts
- List contacts
- Create a contact
- Update a contact
- Delete a contact
Opportunities
- List opportunities
- Create an opportunity
- Update an opportunity
- Delete an opportunity
Invoices
- List invoices
- Create an invoice
- Update an invoice
Estimates
- List estimates
- Create an estimate
- Update an estimate
Tasks
- List tasks
- Create a task
- Update a task
- Delete a task
Checked against Sellsy's own documentation on 2026-10-22
How Tray.ai makes this work
Sellsy plugs into the whole Tray.ai platform
Intelligent Integration
Integrate and automate across 5,000+ apps, databases, APIs, and services with visual workflows, error handling, and observability.
Learn more →Agent Builder
Build AI agents that read, write, and take action in Sellsy — with guardrails, audit, and human-in-the-loop.
Learn more →Agent Gateway for MCP
Expose Sellsy actions as governed MCP tools — observable, rate-limited, authenticated.
Learn more →Tray Helix
Build apps on Sellsy data with your AI assistant, then deploy, run, and govern them on Tray.ai.
Learn more →More sales apps on Tray.ai
Dedicated connectors and other apps Tray.ai reaches in the same category. See every sales connector →
Frequently asked questions
What can a Tray.ai workflow do in Sellsy?
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The Sellsy API documents 22 actions across 6 resources (Companies, Contacts, Opportunities, Invoices, Estimates, Tasks). For example: List companies; List contacts; List opportunities. A workflow can make any documented call through the HTTP Connector.
How does Tray.ai authenticate with Sellsy?
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The Sellsy API uses OAuth 2.0. You save it once as a Tray.ai authentication, and the HTTP Connector adds it to every request.
See Sellsy working against your stack.
We'll walk through a tailored demo with your systems plugged in.
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