--- title: "#developer-guide articles | Hashnode" description: "Explore 61 articles tagged #developer-guide on Hashnode. Tutorials, guides, and how-tos from the community." url: "https://hashnode.com/tag/developer-guide" --- Tag # #developer-guide 61 posts · 0 followers [anyv.ai Team](https://hashnode.com/@anyvai) · [2d ago](https://hashnode.com/posts/one-usd-card-for-chatgpt-claude-gemini-midjourney-and-cursor-a-2026-cost-worksheet/6af3c9c018e07f2007546225) ### [One USD Card for ChatGPT, Claude, Gemini, Midjourney, and Cursor: A 2026 Cost Worksheet](https://anyvai.hashnode.dev/one-usd-card-for-chatgpt-claude-gemini-midjourney-and-cursor-a-2026-cost-worksheet?utm_source=hashnode&utm_medium=feed) Paying for several overseas AI tools at once is less about finding five different payment tricks and more about keeping one dollar-denominated card, one ledger, and one renewal calendar. Carpooling an 6 min read · [anyvai.hashnode.dev](https://anyvai.hashnode.dev/one-usd-card-for-chatgpt-claude-gemini-midjourney-and-cursor-a-2026-cost-worksheet?utm_source=hashnode&utm_medium=feed) [anyv.ai Team](https://hashnode.com/@anyvai) · [3d ago](https://hashnode.com/posts/claude-pro-signup-failures-in-2026-phone-line-type-refunded-cards-and-region-rules/6af275f57dbf812c12df496f) ### [Claude Pro Signup Failures in 2026: Phone Line Type, Refunded Cards, and Region Rules](https://anyvai.hashnode.dev/claude-pro-signup-failures-in-2026-phone-line-type-refunded-cards-and-region-rules?utm_source=hashnode&utm_medium=feed) Summary: Claude signup pain is usually eligibility and phone line type—not a missing “hack.” Anthropic’s supported-region list does not include Mainland China or Hong Kong; +86 and most VoIP numbers f 6 min read · [anyvai.hashnode.dev](https://anyvai.hashnode.dev/claude-pro-signup-failures-in-2026-phone-line-type-refunded-cards-and-region-rules?utm_source=hashnode&utm_medium=feed) [Manu Shukla](https://hashnode.com/@mr-manushukla) · [Jul 28](https://hashnode.com/posts/mcp-tasks-in-2026-build-long-running-resumable-agent-tools/6a6857e6ac3b08f75f818daa) ### [MCP Tasks in 2026: build long-running, resumable agent tools](https://ecorpit.hashnode.dev/mcp-tasks-in-2026-build-long-running-resumable-agent-tools?utm_source=hashnode&utm_medium=feed) MCP Tasks in 2026: build long-running, resumable agent tools Summary. On 28 July 2026 the Model Context Protocol (MCP) publishes the 2026-07-28 specification, and one of its two official extensions, T 18 min read · [ecorpit.hashnode.dev](https://ecorpit.hashnode.dev/mcp-tasks-in-2026-build-long-running-resumable-agent-tools?utm_source=hashnode&utm_medium=feed) [SMTP Provider](https://hashnode.com/@smtpprovider) · [Jun 17](https://hashnode.com/posts/smtp-api-integration-guide-for-developers/6a3267fbc9f123e412327a7b) ### [SMTP API Integration: A Practical Guide for Developers](https://smtp-tips-tricks.hashnode.dev/smtp-api-integration-guide-for-developers?utm_source=hashnode&utm_medium=feed) A developer-focused guide to SMTP API integration, authentication, and email deliverability best practices. 5 min read · [smtp-tips-tricks.hashnode.dev](https://smtp-tips-tricks.hashnode.dev/smtp-api-integration-guide-for-developers?utm_source=hashnode&utm_medium=feed) [Anup Karanjkar](https://hashnode.com/@anupkaranjkar) · [May 2](https://hashnode.com/posts/gpt-4o-retired-complete-developer-migration-guide-april-2026/69f582ed7f5d81b9a4552527) ### [GPT-4o Is Officially Retired: The Complete Developer Migration Guide (April 2026)](https://wowhow.hashnode.dev/gpt-4o-retired-complete-developer-migration-guide-april-2026?utm_source=hashnode&utm_medium=feed) GPT-4o API shut down March 31, 2026. Enterprise access ends April 3. Here is your complete step-by-step migration guide to GPT-5.2, GPT-5.4, and alternatives. 9 min read · [wowhow.hashnode.dev](https://wowhow.hashnode.dev/gpt-4o-retired-complete-developer-migration-guide-april-2026?utm_source=hashnode&utm_medium=feed) [Anup Karanjkar](https://hashnode.com/@anupkaranjkar) · [May 2](https://hashnode.com/posts/owasp-top-10-agentic-applications-2026-developer-security-guide/69f5827e99d977c0df5eb85f) ### [OWASP Top 10 for Agentic AI Apps 2026: Developer Security Guide](https://wowhow.hashnode.dev/owasp-top-10-agentic-applications-2026-developer-security-guide?utm_source=hashnode&utm_medium=feed) The OWASP Top 10 for Agentic Applications 2026 defines 10 critical risks in autonomous AI agents. Developer guide to every risk with mitigation checklist. 9 min read · [wowhow.hashnode.dev](https://wowhow.hashnode.dev/owasp-top-10-agentic-applications-2026-developer-security-guide?utm_source=hashnode&utm_medium=feed) [Anup Karanjkar](https://hashnode.com/@anupkaranjkar) · [Apr 26](https://hashnode.com/posts/mit-technology-review-10-things-matter-ai-right-now-2026/69ee3687340f4a92b8f4a3b9) ### [10 Things That Matter in AI Right Now: MIT Technology Review 2026](https://wowhow.hashnode.dev/mit-technology-review-10-things-matter-ai-right-now-2026?utm_source=hashnode&utm_medium=feed) MIT Technology Review released 10 Things That Matter in AI Right Now in April 2026. A developer breakdown of all ten trends and what they mean for builders. 10 min read · [wowhow.hashnode.dev](https://wowhow.hashnode.dev/mit-technology-review-10-things-matter-ai-right-now-2026?utm_source=hashnode&utm_medium=feed) [Anup Karanjkar](https://hashnode.com/@anupkaranjkar) · [Apr 26](https://hashnode.com/posts/gpt-5-5-complete-developer-guide-api-pricing-2026/69edc609a10e1ee693b74e9f) ### [GPT-5.5 Developer Guide: API, Pricing & Benchmarks (April 2026)](https://wowhow.hashnode.dev/gpt-5-5-complete-developer-guide-api-pricing-2026?utm_source=hashnode&utm_medium=feed) GPT-5.5 API is live with 88.7% SWE-bench, $5/1M tokens, 1M context, and three variants. Complete developer integration guide with pricing, benchmarks, and code examples. 8 min read · [wowhow.hashnode.dev](https://wowhow.hashnode.dev/gpt-5-5-complete-developer-guide-api-pricing-2026?utm_source=hashnode&utm_medium=feed) [Anup Karanjkar](https://hashnode.com/@anupkaranjkar) · [Apr 25](https://hashnode.com/posts/deepseek-v4-flash-pro-complete-developer-guide-april-2026/69ed1d4651034c1d8ce41f6f) ### [DeepSeek V4 Flash & Pro: Complete Developer Guide — April 2026](https://wowhow.hashnode.dev/deepseek-v4-flash-pro-complete-developer-guide-april-2026?utm_source=hashnode&utm_medium=feed) DeepSeek V4 Flash and Pro launch with MIT license, 1M context, and agentic coding SOTA. Developer guide: benchmarks, pricing, and API integration examples. 9 min read · [wowhow.hashnode.dev](https://wowhow.hashnode.dev/deepseek-v4-flash-pro-complete-developer-guide-april-2026?utm_source=hashnode&utm_medium=feed) [Anup Karanjkar](https://hashnode.com/@anupkaranjkar) · [Apr 13](https://hashnode.com/posts/build-first-ai-agent-30-minutes-zero-to-production-2026/69dc989fe5dea6cf048df2be) ### [Build Your First AI Agent in 30 Minutes: Zero to Production (2026)](https://wowhow.hashnode.dev/build-first-ai-agent-30-minutes-zero-to-production-2026?utm_source=hashnode&utm_medium=feed) Step-by-step tutorial: build a real AI agent using Claude API and MCP in 30 minutes. Includes code, architecture, error handling, and deployment. No fluff. 16 min read · [wowhow.hashnode.dev](https://wowhow.hashnode.dev/build-first-ai-agent-30-minutes-zero-to-production-2026?utm_source=hashnode&utm_medium=feed)