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Connectors / Finance · HTTP Connector
Automate Billit with Tray.ai
Create an order, add a payment to an order and create a party in Billit, and start a workflow when Billit sends “Order created”.
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What can you do with Billit on Tray.ai?
Billit is Belgian invoicing and accounting software for sending and receiving e-invoices over Peppol, tracking payments, and managing customers, suppliers and products. Tray.ai connects to Billit through the HTTP Connector, so your workflows can call the Billit API alongside the rest of your stack.
- When Billit sends “Order created”, copy the invoice into your accounting system.
- Create an order for each closed-won deal in your CRM so the invoice goes out without retyping.
- Add a payment to an order when your bank feed shows the customer has paid.
- Connects through
- HTTP Connector
- Authentication
- An API key in a request header or OAuth 2.0
- Base URL
- https://api.billit.be
Set it up
Connect Billit to Tray.ai
Each step uses Billit's own API details, from its documentation.
Step 1
Save Billit's API key
Save the key as a Tray.ai authentication. The HTTP Client puts it in the request header, read from $.auth. The key stays out of the workflow and out of the logs.
Step 2
Point the HTTP Client at the API
Add an HTTP Client step and use https://api.billit.be as the base URL. Or paste a cURL example from Billit's API docs, and Tray.ai fills in the method, URL, and headers.
Step 3
Start with “List orders”
It's one of 22 documented actions, under Orders. The response comes back as data the next step can map into your other apps.
Step 4
Start workflows from Billit events
Give Billit the URL of a Tray.ai webhook trigger. “Order created” can then start a workflow, and so can 4 other events.
What the Billit API covers
6 resources and 22 documented actions, each one a call the HTTP Connector can make from a Tray.ai workflow. Connecting it takes a few clicks: here's how.
Orders
- List orders
- Get an order
- Create an order
- Update an order
- Delete an order
- Send orders
Payments
- Add a payment to an order
- List financial transactions
Parties
- List parties
- Get a party
- Create a party
- Update a party
Products
- List products
- Get a product
- Create a product
Documents
- List documents
- Get a document
- Save a document
Webhooks
- List webhooks
- Create a webhook
- Delete a webhook
- Refresh a webhook secret
Events Billit can send to a Tray.ai webhook trigger
- Order created
- Order updated
- Order deleted
- Message created
- Message updated
Checked against Billit's own documentation on 2026-10-22
How Tray.ai makes this work
Billit plugs into the whole Tray.ai platform
Intelligent Integration
Integrate and automate across 9,000+ 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 Billit — with guardrails, audit, and human-in-the-loop.
Learn more →Agent Gateway for MCP
Expose Billit actions as governed MCP tools — observable, rate-limited, authenticated.
Learn more →Tray Helix
Build apps on Billit data with your AI assistant, then deploy, run, and govern them on Tray.ai.
Learn more →More finance apps on Tray.ai
Dedicated connectors and other apps Tray.ai reaches in the same category. See every finance connector →
Frequently asked questions
What can a Tray.ai workflow do in Billit?
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The Billit API documents 22 actions across 6 resources (Orders, Payments, Parties, Products, Documents, Webhooks). For example: List orders; Add a payment to an order; List parties. A workflow can make any documented call through the HTTP Connector.
How does Tray.ai authenticate with Billit?
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The Billit API uses an API key in a request header and OAuth 2.0. You save it once as a Tray.ai authentication, and the HTTP Connector adds it to every request.
Which Billit events can start a Tray.ai workflow?
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Billit sends 5 events to a webhook URL, for example: Order created; Order updated; Order deleted; Message created; Message updated. A Tray.ai webhook trigger receives them and starts a workflow.
See Billit working against your stack.
We'll walk through a tailored demo with your systems plugged in.
Thanks — someone from our team will be in touch soon.