Finance & ERP · Integration
Altoviz
Add Altoviz to your product for your customers, and give your AI agents governed access to it.
Altoviz is a French small-business management product, and its API at api.altoviz.com authenticates with an X-API-KEY header generated inside the application, returning 401 on any v1 path without it. The object model is invoicing-first: customers and customer families, contacts, products and product families, sale quotes, sale invoices, sale credits, receipts and purchase invoices, with dedicated export endpoints for the accounting books. Invoices are not simply created and updated; there is an explicit finalise step per document, and once finalised the document is legally locked and corrections have to go through a credit note rather than an edit, which is the constraint most implementers meet first. List endpoints page with x-page-index and x-page-size and return the totals in x-page-count and x-record-count response headers rather than in the body, so pagination logic must read headers. Sending a quote or invoice to the customer is its own endpoint too, separate from creation. fastn stores each customer's Altoviz key on their own connection and keeps the finalise, send and export flows working as the API version moves.
In your product
Embedded for your customers. Per-tenant auth, no per-customer code, maintained by fastn.
Let a customer connect their own Altoviz account so invoices raised in your product appear in their books
Create draft sale quotes from your pipeline and leave finalising and sending to the customer's own staff
Show invoice payment status in your app by reading sale invoices and receipts rather than asking users to check two systems
Export the sales and receipts books on a schedule for a customer's accountant without manual downloads
For your AI agents
Governed, audited access for the agents you build, through the MCP server.
Ask an agent which finalised sale invoices are still unpaid past their due date for a given tenant
Have an agent draft a credit note against a specific invoice for human approval, with the action audited per tenant
Let an agent reconcile a receipt against the matching invoice and report anything that does not tie out
Example prompt
Which of our finalised Altoviz invoices are still unpaid and how much is outstanding?
Set up Altoviz in 4 steps
- 01Enable the Altoviz connector from your fastn dashboard.
- 02Have each customer authorise their own Altoviz account, so calls run under their credentials rather than a shared key.
- 03Decide which invoices, payments and vendors your product needs, map those fields, then enable the actions and triggers you want.
- 04Call it from your product and expose it to your agents through the same governed connection.
Why teams use the Altoviz integration
What you get by embedding it with fastn instead of building it yourself.
- Ship an Altoviz integration without building it. Your customers connect their own Altoviz account inside your product and work their invoices, payments and vendors there, with no per-customer code on your side.
- Handle the part that actually costs time: financial writes must be idempotent and reconcilable, because a duplicate is an accounting problem rather than a bug. fastn owns the auth, token refresh, rate limits, pagination and breaking-change fixes, so an Altoviz update is not your on-call problem.
- One integration serves your product and your agents. The same governed Altoviz connection powers in-product features and gives AI agents scoped, audited access, so you move financial records without hand-keying them between systems without wiring it twice.
Used by these teams
Compare with
NetSuite
QuickBooks
XeroOften used alongside
Tools the same teams tend to run next to Altoviz, across other categories.
Shopify
Stripe
BigCommerce
AfterShipAltoviz integration FAQ
How do I add an Altoviz integration to my product?
Enable the Altoviz connector in your fastn dashboard, then let each customer authenticate their own Altoviz account. fastn handles the OAuth flow, token storage and refresh per tenant, so there is no Altoviz client code in your app and no per-customer branch in your codebase. Setup is 4 steps.
Do my customers each connect their own Altoviz account?
Yes. Every connection is scoped to the individual customer, so each authorises their own Altoviz account and only ever sees their own invoices, payments and vendors. That per-tenant isolation is the point of an embedded integration: you support the long tail of customer setups without maintaining an integration per customer.
Can AI agents use this Altoviz integration?
Yes. The same connection is exposed to your agents through the fastn MCP gateway, with permissions scoped per tenant and every call audited. Ask an agent which finalised sale invoices are still unpaid past their due date for a given tenant
Who maintains the Altoviz integration?
fastn does. When Altoviz changes an endpoint, deprecates a field or alters its auth, the fix lands in the connector rather than in your backlog, and your customers' connections keep working.
Is the Altoviz integration safe for financial writes?
Writes are idempotent, so a retry after a timeout does not post a document twice, and every call is logged per tenant so an entry can be traced back to the event that created it. That matters more in finance than anywhere else, because a duplicate is a number somebody has to explain.
Can it handle each customer's own chart of accounts?
Yes. ERP deployments are configured to the business, so account structures, required fields and fiscal calendars differ per customer. Those are mapped per tenant as configuration, not hard-coded.
What about Altoviz rate limits during a first import?
Backfills are throttled deliberately. ERP limits are often account-wide rather than per-integration, so an unthrottled import can exhaust a customer's allowance and disrupt their other integrations.
What can I build with the Altoviz integration?
A common starting point: let a customer connect their own Altoviz account so invoices raised in your product appear in their books. Teams also use it for the other use cases listed above, and expose it to agents for governed reads and writes.
How much does the Altoviz integration cost?
It is included. Pricing is based on connected accounts, not on how many connectors you enable, so adding Altoviz does not change your per-connector cost. You can start free with 3 connected accounts.
Add Altoviz to your product
Start free with 3 connected accounts. No sales call required, and no per-customer integration code.