What accounting platforms charge for API access

Xero charges app developers by the number of connected organisations and the data the app downloads each month (egress). Starter is free for up to 5 connections. Paid tiers are Core USD 25, Plus USD 145, Advanced USD 895 a month, tax exclusive, with USD 1.5 per GB above each tier's allowance. Above 10,000 connections, Enterprise is priced on application. Sending data to Xero is free. Xero publishes its own price list per currency: in euros the paid tiers are EUR 25, EUR 145, EUR 845 a month, with EUR 1.45 per GB.

Intuit charges through the Intuit App Partner Program, and only for read calls that pull data out of QuickBooks (CorePlus calls); write calls are free. The Builder tier is free up to 500k read calls a month, and calls above that are blocked. Paid tiers are Silver USD 300, Gold USD 1,700, Platinum USD 4,500 a month, each with included calls and a per-1,000-call rate above them. Gold needs at least 500 active connections and Platinum 3,000.

Sage Intacct requires its Marketplace Partner Program. The fee is USD 2,500 a year, which includes about 66,666 API calls a month (a USD 1,000 monthly credit at USD 0.015 a call). Higher volumes are agreed with Sage. Sage confirmed these figures to Apideck in October 2026; it does not publish them.

39 of the 48 platforms on this page charge app developers nothing to connect, including NetSuite, Dynamics 365 Business Central, Zoho Books, FreshBooks, FreeAgent, Moneybird, Lexware Office. Your customers still pay for their own subscription, and some platforms need a plan with API access, such as Odoo Custom, Lexware Office XL or sevDesk Buchhaltung Pro.

17 of the 48 platforms require approval, a developer program or certification before an app goes live, including QuickBooks Online, Xero, Sage Intacct, Exact Online, SnelStart, DATEV Unternehmen online, Twinfield, MRI Software, Access Financials. Others offer optional programs for a marketplace listing or co-marketing, such as SuiteCloud Developer Network (NetSuite), Microsoft ISV Success (Dynamics 365 Business Central) and SAP PartnerEdge Build. Those are not needed for API access.

The application owner: the company that registers its app with the accounting platform and holds the developer agreement. The platform bills that company directly, whichever integration provider it uses. These fees are separate from what end customers pay for their accounting subscription and from Apideck’s own pricing.

No. Platform fees are charged by the accounting platform for API access, so they apply whether you build each integration yourself or use a unified API like Apideck. What a unified API removes is the engineering: one integration instead of one per platform, with authentication, data mapping and maintenance handled for you.

Yes. With Apideck you register your own app with each platform, such as a Xero app or an Intuit Developer app, and Apideck connects through it. The listing is your app, under your name and brand. Apideck does not appear to your customers: the connection screen is white-label, and the OAuth redirect can run on your own domain, which certification programs such as Xero’s ask for. Some marketplaces only list apps built on the platform itself, such as NetSuite SuiteApps or Business Central extensions on Microsoft AppSource; a connection through an API does not produce that package, so check each marketplace’s listing rules.

You do. The app owner is the registered developer with each platform, holds the OAuth client credentials, accepts the platform’s terms and goes through its review. Apideck does not hold developer agreements or certifications on your behalf. 17 of the 48 platforms on this page require approval or certification before an app goes live; the price index on this page shows which, and what each charges.

Yes. A marketplace listing points to a launch or sign-up URL in your app, for example the Launch URL in an Intuit app’s settings. From that page your app opens the Apideck connection flow, the customer authorizes your app on the platform, and Apideck stores and refreshes the tokens. The same flow serves customers who start from inside your product.

The platform’s own partner fees, listed on this page, are the main cost, and they are paid to the platform whether or not you use a unified API. Time goes mostly into each platform’s review: QuickBooks requires the App Assessment Questionnaire and a security review before an app is listed, and Xero reviews the app with live customer connections before certifying it. Building the integration itself is the part a unified API shortens.

Every figure comes from the platform itself: its own pricing page, terms or developer documentation, linked in the table, or a written confirmation from the platform where it does not publish the figure. Each row shows the date it was last checked; the latest check was on 16 Oct 2026. Currency conversion uses the European Central Bank reference rate of the day.