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What is HTTP?

HTTP (Hypertext Transfer Protocol) is the foundational protocol of the web that defines how clients and servers communicate. Every API call, web page load, and webhook delivery travels over HTTP.

What is HTTP?

HTTP (Hypertext Transfer Protocol) is the application-layer protocol that powers the World Wide Web. It defines a request-response model where a client (typically a browser or application) sends a request to a server, and the server returns a response containing the requested resource or the result of an action.

Key Concepts

  • Methods: GET (retrieve), POST (create), PUT (replace), PATCH (partial update), DELETE (remove), HEAD (metadata only), OPTIONS (capabilities).
  • Status codes: 2xx (success), 3xx (redirect), 4xx (client error), 5xx (server error). Common codes include 200 OK, 301 Moved Permanently, 400 Bad Request, 401 Unauthorized, 403 Forbidden, 404 Not Found, 429 Too Many Requests, 500 Internal Server Error.
  • Headers: Metadata sent with requests and responses — authentication tokens, content types, caching directives, CORS policies.
  • HTTPS: HTTP over TLS encryption. Standard for all modern web traffic, protecting data integrity and privacy in transit.

    • HTTP in Automation

    Every browser automation step, API call, and webhook delivery is an HTTP transaction. Understanding HTTP status codes and headers is essential for building reliable automations — a 429 response means you need to back off, a 301 means you should follow the redirect, and a 500 means the server had an error you should retry.

    HTTP/2 and HTTP/3

    HTTP/2 introduced multiplexing (multiple requests over a single connection), header compression, and server push. HTTP/3 replaces TCP with QUIC for faster connection setup and better performance on lossy networks. Most modern servers and browsers support HTTP/2, with HTTP/3 adoption growing rapidly.

    HTTP is the foundational protocol of the web, with its semantics standardized in RFC 9110. Autonoly issues and interprets HTTP requests directly through its API & HTTP feature.

    Why It Matters

    HTTP is the transport layer for virtually all web-based automation. Understanding its methods, status codes, and headers is essential for debugging failed API calls, configuring integrations, and building workflows that handle errors gracefully.

    How Autonoly Solves It

    Autonoly's HTTP node supports all standard HTTP methods, custom headers, authentication schemes, and automatic status code handling. You do not need to understand the protocol details — Autonoly interprets responses, follows redirects, and retries transient failures automatically within your workflows.

    Learn more

    Examples

    • Sending an HTTP GET request to fetch pricing data from a public API

    • Configuring custom HTTP headers for Bearer token authentication in an API workflow

    • Diagnosing a failed automation step by inspecting the HTTP 403 response indicating a permissions issue

    Frequently Asked Questions

    HTTPS is HTTP with TLS encryption. It ensures that data exchanged between client and server cannot be intercepted or tampered with. All modern websites and APIs should use HTTPS. The only difference is the encryption layer — the protocol semantics (methods, headers, status codes) are identical.

    A 429 Too Many Requests response means you have exceeded the API's rate limit. You should implement backoff logic — wait for the duration specified in the Retry-After header before sending another request. Most automation platforms handle this automatically.

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    Related terms, automations and guides

    Where this concept shows up in practice.

    DefinitionREST APIA REST API is a web service interface that follows Representational State Transfer (REST) architectural principles, using standard HTTP methods to create, read, update, and delete resources. It is the most widely adopted API style for web and mobile applications.DefinitionAPI IntegrationAPI integration is the process of connecting two or more applications through their APIs so they can exchange data and trigger actions automatically. It eliminates manual data entry by letting systems communicate directly with each other in real time.DefinitionWebhookA webhook is an HTTP callback that automatically sends data from one application to another when a specific event occurs. Unlike polling an API repeatedly, webhooks push updates in real time the moment something happens.DefinitionJSONJSON (JavaScript Object Notation) is a lightweight, text-based data interchange format that uses human-readable key-value pairs and arrays to represent structured data. It is the dominant format for web APIs and configuration files.DefinitionRate LimitingRate limiting is a technique that controls the number of requests a client can make to a server within a given time window, preventing abuse and ensuring fair resource distribution.DefinitionSDKAn SDK (Software Development Kit) is a packaged set of tools, libraries, and documentation that developers use to build applications for a specific platform or integrate with a specific service. SDKs simplify API interaction by abstracting low-level HTTP details into native-language function calls.DefinitionBrowser AutomationBrowser automation is the use of software to control a web browser programmatically, performing tasks like clicking buttons, filling forms, and extracting data without manual human interaction.GuideWeb Scraping Best Practices: Avoiding Blocks, Bans, and Legal IssuesA comprehensive guide to web scraping best practices. Learn how to avoid IP blocks, bypass CAPTCHAs, handle anti-bot detection systems, respect legal boundaries, and use AI agents to automate compliant data extraction at scale.

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