REST API
The most common API architecture. Uses standard HTTP methods (GET, POST, PUT, DELETE) and returns JSON. Almost every modern SaaS tool exposes a REST API, making it the primary integration mechanism for automation workflows.
Expert insight
REST isn't the only API style you'll run into, GraphQL and SOAP still show up, especially in older enterprise systems, and each needs a different node or approach in n8n. The practical tell: if the vendor's docs show you a single endpoint you POST a query object to, it's GraphQL, not REST, and treating it like a REST resource will waste hours.
In a real workflow
A workflow uses GET to read a customer and PATCH to update their status through a REST API.
Common mistakes
- Using the wrong HTTP method and causing side effects.
- Ignoring pagination on list endpoints.
Complexity level
Requires some familiarity with automation concepts.
Related terms
API (Application Programming Interface)
A set of rules that allow two software applications to communicate. Most automat…
HTTP Request
The mechanism by which most modern automations communicate with external service…
JSON (JavaScript Object Notation)
The universal data format for APIs and webhooks. When Stripe sends a payment eve…
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More in Core concepts
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API documentation
The reference guide for an application's API endpoints, authentication…
Go deeper
Guides that cover REST API
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The seven Airtable alternatives worth considering in 2026, from open-source Baserow, NocoDB and Grist to SmartSuite, Smartsheet, Notion and Google Sheets, compared on power, ease, cost at scale and data ownership.
n8n HTTP Request Node: Complete Documentation and Examples
The HTTP Request node is the most used node in n8n, connecting your workflows to any API or web service. This guide covers every configuration option, authentication method, error handling pattern, and real-world example you need.
Stripe to QuickBooks Integration: The Automation That Eliminates Manual Bookkeeping
Every Stripe payment that gets manually re-entered into QuickBooks costs 4-7 minutes and carries a 12% error rate. Here is the integration that ends that entirely, syncing every charge, refund, and subscription event in real time.