First, the user wants an original article for the keyword "Wp Json". I need to use the provided context when useful. The context includes snippets about WordPress REST API, headless WordPress with Next.js, API security, bug bounty, and fixes. I should weave these into the article naturally. The article must be 600 to 900 words, with natural headings. I need to avoid unsupported claims and not mention that it was AI-generated. The output should be safe HTML using only h2, h3, p, ul, ol, li, strong, and em tags. No markdown fences. I'll structure the article around WP-JSON, which is the WordPress REST API endpoint (wp-json). Topics could include what it is, how to use it, security considerations, and practical applications like headless WordPress development. Outline: 1. Introduction to WP-JSON and its role in WordPress REST API. 2. How to use WP-JSON with tools like Postman. 3. Building a headless WordPress blog with Next.js using WP-JSON. 4. Security implications and how to protect WP-JSON endpoints. 5. Common issues and fixes. 6. Conclusion. I'll incorporate the context snippets where relevant. For example, mention using Postman to send requests, building with Next.js, API security, and fixing issues. Draft the article in HTML format. Let me write the article step by step. **Heading 1: Introduction** - Explain that WP-JSON is the native REST API endpoint in WordPress. - Mention that it allows developers to interact with WordPress data programmatically. **Heading 2: Getting Started with WP-JSON** - How to access it: `yoursite.com/wp-json/wp/v2/posts` - Using Postman to test requests and get responses. **Heading 3: Using WP-JSON for Headless WordPress** - Building a headless blog with Next.js and WP-JSON. - Fetching data with fetch or Axios. **Heading 4: Securing Your WP-JSON Endpoints** - API security best practices. - Common vulnerabilities and how to mitigate them. **Heading 5: Troubleshooting Common WP-JSON Issues** - Fixing permission errors, CORS issues, etc. - Referencing context about fixing issues. **Heading 6: Conclusion** - Summary and encouragement to explore further. Now, write the content. Ensure it's between 600-900 words. Use natural headings without markdown. Since I can't use markdown fences, I'll write HTML directly. Start with ``? No, the user said "Return only safe HTML using h2, h3, p, ul, ol, li, strong, and em tags." So I don't need full HTML document, just the tags. But for structure, I'll use headings and paragraphs. I'll write: ```html

Introduction

...

``` But to make it natural, I'll use h2 for main headings and h3 for subheadings. Let me draft the article. **Introduction** WP-Json is the core REST API endpoint in WordPress, enabling developers to access and manipulate site data through HTTP requests. This article explores its features, practical applications, and security considerations. Use context: "In this video — you'll learn how WordPress core comes with a REST API and how to use Postman to send a request and get a ..." So I'll mention Postman. **Using Postman with WP-JSON** You can use Postman to send requests to WP-JSON endpoints. For example, GET request to `/wp/v2/posts` returns a list of posts in JSON format. **Headless WordPress with Next.js** The context says: "Learn how to build a headless WordPress blog with Next.js 15 using the powerful App Router and TypeScript!" So I'll talk about using WP-JSON as the data source for Next.js. **Security** Context: "In this video, we guide you through the API Security section of" and blog post about blocking access. Also, "bug bounty" and "crosssitescripting" etc. So I'll cover security risks and how to protect WP-JSON. **Common Fixes** Context: "This Video Show how to fix" so I can discuss common issues like 404 errors or permission problems. Now