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REST APIs

The glue between the frontend and backend

FAQs

What is an API?

An Application Program Interface (API) is a set of defined functions that access data, perform operations, and decouple applications, e.g., a library.

What is REST?

Representational State Transfer (REST) is a software architecture for developing web services.

What exactly is RESTful programming?

What is a REST API?

Bringing these two concepts together, a REST API is a web service that has defined functions to retrieve data and perform operations. They decouple applications and works as a middle man between the frontend and the backend.

diagram

A Beginner’s Tutorial for Understanding RESTful API

How are they made?

They can be developed in most of the popular programming languages and are usually paired with a web framework. Some examples of this are Java and Spring, Javascript and Node/Express, and Python and Flask.

Where do they live?

REST APIs live on the backend. This means they generally run on a remote server.

How do you access them?

Generally, REST APIs use the HTTP protocol to communicate with the outside world. Each action will be assigned a URL path and accessed by a GET/POST/PUT/DELETE method. A great tool for working with APIs is Postman.

What is Postman?

Postman is an API development app that presents an easy to read GUI for users to construct requests and read responses.

Exercise

To create your own sample REST API please follow this exercise.

About

A simple explanation and tutorial on REST APIs

youtu.be/Ws0v0-Fj8_o

Resources

Readme
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0 stars

Watchers

5 watching

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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REST APIs
The glue between the frontend and backend
FAQs
What is an API?
An Application Program Interface (API) is a set of defined functions that access data, perform operations, and decouple applications, e.g., a library.
What is REST?
Representational State Transfer (REST) is a software architecture for developing web services.
What exactly is RESTful programming?
What is a REST API?
Bringing these two concepts together, a REST API is a web service that has defined functions to retrieve data and perform operations. They decouple applications and works as a middle man between the frontend and the backend.
diagram
A Beginner’s Tutorial for Understanding RESTful API
How are they made?
They can be developed in most of the popular programming languages and are usually paired with a web framework. Some examples of this are Java and Spring, Javascript and Node/Express, and Python and Flask.
Where do they live?
REST APIs live on the backend. This means they generally run on a remote server.
How do you access them?
Generally, REST APIs use the HTTP protocol to communicate with the outside world. Each action will be assigned a URL path and accessed by a GET/POST/PUT/DELETE method. A great tool for working with APIs is Postman.
What is Postman?
Postman is an API development app that presents an easy to read GUI for users to construct requests and read responses.
Exercise
To create your own sample REST API please follow this exercise.
About
A simple explanation and tutorial on REST APIs
youtu.be/Ws0v0-Fj8_o
Resources
Readme
Activity
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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BranchesTags
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REST APIs
The glue between the frontend and backend
FAQs
What is an API?
An Application Program Interface (API) is a set of defined functions that access data, perform operations, and decouple applications, e.g., a library.
What is REST?
Representational State Transfer (REST) is a software architecture for developing web services.
What exactly is RESTful programming?
What is a REST API?
Bringing these two concepts together, a REST API is a web service that has defined functions to retrieve data and perform operations. They decouple applications and works as a middle man between the frontend and the backend.
diagram
A Beginner’s Tutorial for Understanding RESTful API
How are they made?
They can be developed in most of the popular programming languages and are usually paired with a web framework. Some examples of this are Java and Spring, Javascript and Node/Express, and Python and Flask.
Where do they live?
REST APIs live on the backend. This means they generally run on a remote server.
How do you access them?
Generally, REST APIs use the HTTP protocol to communicate with the outside world. Each action will be assigned a URL path and accessed by a GET/POST/PUT/DELETE method. A great tool for working with APIs is Postman.
What is Postman?
Postman is an API development app that presents an easy to read GUI for users to construct requests and read responses.
Exercise
To create your own sample REST API please follow this exercise.
About
A simple explanation and tutorial on REST APIs
youtu.be/Ws0v0-Fj8_o
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
5 watching
Forks
5 forks
Report repository
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Used by
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
REST APIs
The glue between the frontend and backend
FAQs
What is an API?
An Application Program Interface (API) is a set of defined functions that access data, perform operations, and decouple applications, e.g., a library.
What is REST?
Representational State Transfer (REST) is a software architecture for developing web services.
What exactly is RESTful programming?
What is a REST API?
Bringing these two concepts together, a REST API is a web service that has defined functions to retrieve data and perform operations. They decouple applications and works as a middle man between the frontend and the backend.
diagram
A Beginner’s Tutorial for Understanding RESTful API
How are they made?
They can be developed in most of the popular programming languages and are usually paired with a web framework. Some examples of this are Java and Spring, Javascript and Node/Express, and Python and Flask.
Where do they live?
REST APIs live on the backend. This means they generally run on a remote server.
How do you access them?
Generally, REST APIs use the HTTP protocol to communicate with the outside world. Each action will be assigned a URL path and accessed by a GET/POST/PUT/DELETE method. A great tool for working with APIs is Postman.
What is Postman?
Postman is an API development app that presents an easy to read GUI for users to construct requests and read responses.
Exercise
To create your own sample REST API please follow this exercise.
About
A simple explanation and tutorial on REST APIs
youtu.be/Ws0v0-Fj8_o
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
5 watching
Forks
5 forks
Report repository
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Used by
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
BranchesTags
Repository files navigation
REST APIs
The glue between the frontend and backend
FAQs
What is an API?
An Application Program Interface (API) is a set of defined functions that access data, perform operations, and decouple applications, e.g., a library.
What is REST?
Representational State Transfer (REST) is a software architecture for developing web services.
What exactly is RESTful programming?
What is a REST API?
Bringing these two concepts together, a REST API is a web service that has defined functions to retrieve data and perform operations. They decouple applications and works as a middle man between the frontend and the backend.
diagram
A Beginner’s Tutorial for Understanding RESTful API
How are they made?
They can be developed in most of the popular programming languages and are usually paired with a web framework. Some examples of this are Java and Spring, Javascript and Node/Express, and Python and Flask.
Where do they live?
REST APIs live on the backend. This means they generally run on a remote server.
How do you access them?
Generally, REST APIs use the HTTP protocol to communicate with the outside world. Each action will be assigned a URL path and accessed by a GET/POST/PUT/DELETE method. A great tool for working with APIs is Postman.
What is Postman?
Postman is an API development app that presents an easy to read GUI for users to construct requests and read responses.
Exercise
To create your own sample REST API please follow this exercise.
About
A simple explanation and tutorial on REST APIs
youtu.be/Ws0v0-Fj8_o
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
5 watching
Forks
5 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
REST APIs
The glue between the frontend and backend
FAQs
What is an API?
An Application Program Interface (API) is a set of defined functions that access data, perform operations, and decouple applications, e.g., a library.
What is REST?
Representational State Transfer (REST) is a software architecture for developing web services.
What exactly is RESTful programming?
What is a REST API?
Bringing these two concepts together, a REST API is a web service that has defined functions to retrieve data and perform operations. They decouple applications and works as a middle man between the frontend and the backend.
diagram
A Beginner’s Tutorial for Understanding RESTful API
How are they made?
They can be developed in most of the popular programming languages and are usually paired with a web framework. Some examples of this are Java and Spring, Javascript and Node/Express, and Python and Flask.
Where do they live?
REST APIs live on the backend. This means they generally run on a remote server.
How do you access them?
Generally, REST APIs use the HTTP protocol to communicate with the outside world. Each action will be assigned a URL path and accessed by a GET/POST/PUT/DELETE method. A great tool for working with APIs is Postman.
What is Postman?
Postman is an API development app that presents an easy to read GUI for users to construct requests and read responses.
Exercise
To create your own sample REST API please follow this exercise.
About
A simple explanation and tutorial on REST APIs
youtu.be/Ws0v0-Fj8_o
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
5 watching
Forks
5 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
REST APIs
The glue between the frontend and backend
FAQs
What is an API?
An Application Program Interface (API) is a set of defined functions that access data, perform operations, and decouple applications, e.g., a library.
What is REST?
Representational State Transfer (REST) is a software architecture for developing web services.
What exactly is RESTful programming?
What is a REST API?
Bringing these two concepts together, a REST API is a web service that has defined functions to retrieve data and perform operations. They decouple applications and works as a middle man between the frontend and the backend.
diagram
A Beginner’s Tutorial for Understanding RESTful API
How are they made?
They can be developed in most of the popular programming languages and are usually paired with a web framework. Some examples of this are Java and Spring, Javascript and Node/Express, and Python and Flask.
Where do they live?
REST APIs live on the backend. This means they generally run on a remote server.
How do you access them?
Generally, REST APIs use the HTTP protocol to communicate with the outside world. Each action will be assigned a URL path and accessed by a GET/POST/PUT/DELETE method. A great tool for working with APIs is Postman.
What is Postman?
Postman is an API development app that presents an easy to read GUI for users to construct requests and read responses.
Exercise
To create your own sample REST API please follow this exercise.
About
A simple explanation and tutorial on REST APIs
youtu.be/Ws0v0-Fj8_o
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
5 watching
Forks
5 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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REST APIs
The glue between the frontend and backend
FAQs
What is an API?
An Application Program Interface (API) is a set of defined functions that access data, perform operations, and decouple applications, e.g., a library.
What is REST?
Representational State Transfer (REST) is a software architecture for developing web services.
What exactly is RESTful programming?
What is a REST API?
Bringing these two concepts together, a REST API is a web service that has defined functions to retrieve data and perform operations. They decouple applications and works as a middle man between the frontend and the backend.
diagram
A Beginner’s Tutorial for Understanding RESTful API
How are they made?
They can be developed in most of the popular programming languages and are usually paired with a web framework. Some examples of this are Java and Spring, Javascript and Node/Express, and Python and Flask.
Where do they live?
REST APIs live on the backend. This means they generally run on a remote server.
How do you access them?
Generally, REST APIs use the HTTP protocol to communicate with the outside world. Each action will be assigned a URL path and accessed by a GET/POST/PUT/DELETE method. A great tool for working with APIs is Postman.
What is Postman?
Postman is an API development app that presents an easy to read GUI for users to construct requests and read responses.
Exercise
To create your own sample REST API please follow this exercise.
About
A simple explanation and tutorial on REST APIs
youtu.be/Ws0v0-Fj8_o
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
5 watching
Forks
5 forks
Report repository
Releases
Packages
Used by
Contributors
Languages