Integrations, tested not assumed.
What each system’s API genuinely exposes, what it does not, and where the integration breaks - checked against the published documentation rather than the marketing page.
Every one of these has an API. We speak it.
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APIAroFlo
AroFlo’s public API from its own docs: HMAC on every call, 3 a second and 2,000 a day, no webhooks, no sandbox. What that means for a build. Not built against.
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APICustom and legacy systems
Automating around a system with no API: CSV export and import, file drops, email parsing, read-only database access. Why screen scraping is refused.
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APIGoHighLevel
GoHighLevel allows 100 requests per 10 seconds and 200,000 a day per location, with over 80 webhook events. Its data lives in the United States, and its webhook signature scheme changes in September 2026.
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APIMicrosoft 365
Microsoft Graph from Microsoft’s own docs: 10,000 calls per 10 minutes and 4 concurrent per mailbox, subscriptions expiring in days, data at rest in Australia.
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APIMYOB
MYOB has no webhooks and publishes no rate limit figures. What that means for an integration, from MYOB’s own documentation, plus the scope change that lands on 1 September 2026.
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APIn8n
n8n is the only system in our register where Australian data residency is achievable — by self-hosting. Its licence also forbids charging clients for access to that instance. Both facts matter before you build.
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APIQuickBooks Online
QuickBooks Online publishes all thirteen fields we track, including the ones that hurt: read-only fields overwritten silently, webhooks that block behind an unacknowledged event, and a query language with no OR.
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APIServiceM8
ServiceM8 allows 180 requests a minute, sends webhooks that contain no data, and does not sign them. What that means for a build, from ServiceM8’s own developer documentation.
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APISimpro
Simpro has the best webhook coverage of the nine systems we track and the most structurally awkward API. Per-customer hostnames, 14-day refresh tokens and 10 requests a second, from Simpro’s own documentation.
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APIStripe
Stripe documents its own failure modes better than any system in our register: unordered events, duplicate deliveries, 24-hour idempotency, and a per-currency minimum charge. All from Stripe’s own documentation.
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APITradify
Tradify publishes no API, webhooks or developer portal. What can still be automated — CSV exports, job import, accounting sync — from its own help centre.
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APIXero
What the Xero API actually allows, from Xero’s own documentation: rate limits, token lifetimes, webhook behaviour, and the March 2026 change that made API access a paid product.
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APIZapier
What a Zapier task actually is, what it costs, what happens when you run out, and the point at which a custom build gets cheaper. From Zapier’s own pricing and platform documentation.
Open
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