API / SDK
Practical guides to the Gemini API and SDKs — quickstarts, Function Calling, structured output, streaming, cost optimization, and troubleshooting.
Automating Pre-Release UI Checks with Gemini 3.2 Flash Vision — A Personal Dev Story
How I used Gemini 3.2 Flash's multimodal input to automatically QA iOS/Android app screenshots before each release. Detect text overflow, dark mode contrast issues, and layout breaks with a 30-line Python script — and why this works for indie developers without a QA team.
Gemini File API Stuck in PROCESSING State: Timeout Handling and Retry Design
Fix Gemini File API files stuck in PROCESSING state. Learn proper polling with exponential backoff, timeout design, and cleanup strategies with working Python code examples.
Gemini API vs Claude API vs GPT-4o: Measured Costs from a Production Wallpaper App Pipeline
Real-world cost, speed, and output quality benchmarks for Gemini API, Claude API, and GPT-4o, measured on a wallpaper app metadata pipeline running in production.
Gemini 3.2 API Suddenly Broke — 5 Common Errors and How to Fix Them
Switched to Gemini 3.2 API and hit a wall? This guide covers 5 common errors developers encounter during migration — wrong model IDs, rate limits, context overflow, streaming interruptions, and Function Calling schema failures — with working code fixes.
Personalized Push Notifications at Scale: Gemini 3 Pro × Firebase Cloud Messaging for Indie App Developers
If your push notification open rates have plateaued, this guide shows how to combine Gemini 3 Pro with Firebase Cloud Messaging to generate per-user copy. Includes the production architecture, working code, PII guardrails, and real cost numbers from a live indie app.
Putting Gemini Embeddings in the Browser — Building a Serverless FAQ Search with IndexedDB
How I shipped semantic search for a few hundred FAQ entries without standing up a vector database. Gemini Embedding runs once at build time, the index sits in IndexedDB, and searches happen in the browser.
Cutting Gemini Embedding's output_dimensionality from 768 to 256 reduced my vector DB storage to one-third
An indie developer's record of trimming gemini-embedding-001 from 768 to 256 dimensions for an 80,000-row wallpaper recommendation index, with measured numbers on storage, cost, recall trade-offs, an int8 quantization implementation, a CI benchmark gate, and the five-step rollout plan I now use in production.
Gemini API: RESOURCE_EXHAUSTED When Sending Large PDFs or Videos via inlineData — When to Switch to Files API
Why the Gemini API returns RESOURCE_EXHAUSTED for large PDFs or videos sent via inlineData, and a practical migration path to Files API based on real indie-developer experience.
What I Tried, In Order, When Gemini API Returned User location is not supported in Production
Hitting the Gemini API from Cloudflare Workers or Vercel and getting hit with a sudden 'User location is not supported' error? Here is the exact order I worked through, drawn from a live production incident on my own indie apps.
Gemini API Returns 400 When You Set tools and responseSchema Together — Three Designs That Make Function Calling and Structured Output Coexist
You want function calling to fetch external data and a strict JSON shape for the final answer. Setting tools and responseSchema together returns 400. Here's why, plus three production-tested designs that make both work.
Why I Always Resize Images With Pillow Before Sending Them to the Gemini API
A practical look at why preprocessing images with Pillow before they reach the Gemini API quietly cuts both latency and token usage. Numbers from a real personal project, plus the helper function I now reuse everywhere.
Build a Voice + Screen-Share AI Pair Programmer with the Gemini Live API in TypeScript
A practical playbook for wiring the Gemini Live API to getDisplayMedia and a microphone to build an over-the-shoulder AI pair programmer in TypeScript, with cost controls and the gotchas I hit in production.
Migrating from Gemini 2.5 Pro to 3.2 Pro in 7 Days — A Production Playbook for Compatibility Testing, Output Diff Scoring, and Rollback Design
A 7-day playbook for moving production systems from Gemini 2.5 Pro to 3.2 Pro: compatibility testing, LLM-as-Judge scoring, shadow traffic, and rollback.
Gemini API DEADLINE_EXCEEDED Errors: Five Things to Check First
When DEADLINE_EXCEEDED suddenly starts spiking on your Gemini API backend, here are the five checks I run first — based on real production debugging.
Building a RAG Evaluation Framework with Gemini API: RAGAS, LLM-as-Judge, and Custom Metrics Production Masterclass
Complete guide to building a quantitative RAG evaluation framework using RAGAS, LLM-as-Judge with Gemini API, and custom domain metrics — including CI/CD integration and production monitoring.
Monetizing Content Production Services with Gemini 2.5 Flash's Low-Cost Advantage
A practical guide to building profitable content production services using Gemini 2.5 Flash's cost efficiency. Covers model routing between Flash and Pro, async batch processing design, and real revenue simulations.
One Month with Gemini 2.5 Flash: An Indie Developer's Honest Cost and Performance Report
Real cost, speed, and quality data from running Gemini 2.5 Flash across three indie apps for a full month. Includes free-tier usage patterns, Flash vs Pro decision criteria, and cost-minimizing Python code.
Never Embed Your Gemini API Key in a Mobile App: Complete Multi-Layer Security Architecture with Firebase App Check
A production-grade guide to securing Gemini API access in mobile apps. Covers Firebase App Check, Cloud Functions proxy, rate limiting, and anomaly detection — with complete iOS and Android code examples.
Fixing Gemini API Rate Limit Errors: A Complete Troubleshooting Guide
How to handle Gemini API 429 Too Many Requests and RESOURCE_EXHAUSTED errors. Covers exponential backoff, batch processing strategies, and practical patterns for staying within rate limits.
Choosing the Right Gemini RAG Pattern in 2026 — Simple vs Advanced vs Agentic, Compared with Real Code
Compare three RAG implementation patterns with the Gemini API — Simple, Advanced, and Agentic — using real code examples. Learn which pattern fits your use case and where to start.
When Gemini API Output Seems Wrong: 7 Common Causes and a Diagnostic Checklist
When Gemini API returns unexpected output — empty responses, wrong language, broken JSON, or Thinking content leaking into answers — here are 7 common causes with a practical diagnostic checklist and code examples.
Cutting Gemini API Costs by 80%: Context Caching and Implicit Caching
A hands-on guide to reducing Gemini API costs by 80% using Context Caching and Implicit Caching. Includes decision frameworks, working code examples, and a troubleshooting checklist for when caching stops working in production.
Judging Gemma 4 and Nemotron 3 Nano Omni on 100 of My Own Images, Not a Benchmark Score
Heron-Bench and JMMMU headline scores are the wrong input for an adoption decision on local Japanese multimodal models. Using a wallpaper classifier as the case, here is how to build a 100-image eval set, weight errors by what they actually cost, and catch regressions when you re-quantize.
Solving Gemini API Cold Starts — Production-Grade Startup Optimization for Cloud Run, Lambda, and Workers
When you put Gemini API on serverless, the first request takes six seconds. This guide breaks down where the time goes and shows concrete startup-optimization patterns for Cloud Run, AWS Lambda, and Cloudflare Workers — with real numbers, runnable code, and cost trade-off advice.
Fixing Gemini API 'This Model Is Overloaded' — Retry Strategy and Timeout Patterns
Practical fixes for Gemini API overload errors, timeouts, and slow responses. Includes production-ready exponential backoff, model fallback patterns, and rate limiting code you can drop into your project today.
Gemini API FAILED_PRECONDITION Error: Case-by-Case Diagnosis and Fixes
FAILED_PRECONDITION in Gemini API means 'the current system state doesn't allow this operation.' Learn to diagnose and fix all common causes: billing setup, API enablement, context cache expiry, and model access restrictions.
Implementing Structured Output with Gemini Function Calling — Multi-Tool Design Patterns
A practical guide to reliable structured output with Gemini API Function Calling — covering tool definition best practices, multi-tool coordination, and error handling.
Why Is My Gemini API Response Slow? A Practical Diagnosis Guide
Slow Gemini API responses and timeout errors can stem from 4 different causes. This guide walks you through diagnosing each one and applying targeted fixes that actually work.
Building a Type-Safe Gemini Chat Store with Drizzle ORM — Multi-Turn Persistence, Branching Threads, and Vector Search in Production
A production-grade design for persisting Gemini API multi-turn conversations with Drizzle ORM. Covers streaming saves, branching threads, function calling history, pgvector integration, and the migration strategy you actually need.
Building a Subscription SaaS on Gemini API and Cloudflare Workers — A Complete 2026 Implementation Guide
How I wire Gemini API, Stripe, and Cloudflare Workers into a subscription SaaS — with code, and with the places that actually bite: signature checks on Workers, webhook idempotency, KV access control, and the limits of a KV rate limiter.
Launching a Paid Service on Gemini API — A 2026 Roadmap
A practical 2026 roadmap for monetizing a service built on Gemini API — covering model selection, unit economics, pricing models, and the architectural decisions that decide whether your low API costs become a competitive edge or a price-war trap.
A Blueprint for Building a Profitable Indie SaaS on the Gemini API
How to take Gemini's long context, native multimodality, and generous free tier and build them into a recurring-revenue SaaS as a solo founder. Pricing tiers, cost routing rules, and a 90-day plan to your first $1,000 of MRR.
Gemini API Prepaid Billing Migration 2026 — Impact and Pre-Flight Checklist
Gemini API is moving to a prepaid billing model. Here's exactly what changes, what breaks if you ignore it, and the pre-flight checklist I used for my own production services.
Auto-Categorizing 3,000 Wallpaper Images With Gemini Vision API — A Real Production Account
Manually categorizing thousands of wallpaper images doesn't scale. This is a hands-on account of building an auto-classification pipeline with Gemini Vision API — covering design, implementation, actual cost, and the failure patterns I hit running 3,000 images through it.
Automate Contact Form Handling with Gemini API — Classification, Priority Scoring & Slack Alerts
Build a Python system that automatically classifies incoming contact form submissions using Gemini API, scores their priority, and sends structured Slack notifications — ready to deploy today.
Cut Gemini API Costs by 6x with Gemini 2.5 Flash-Lite
Gemini 2.5 Flash-Lite is now stable and generally available. This guide compares pricing against Flash and Pro with real numbers, walks through Python code examples, and explains which tasks are a perfect fit—and which aren't.
Common Gemini API Long Context Problems and How to Fix Them
Struggling with Gemini API's 1 million token context window? This guide covers the most common issues — ignored middle content, slow responses, unexpected costs, and unstable output — with practical code fixes.
Why Gemini API Returns RECITATION as finish_reason — and How to Fix It
When Gemini API silently truncates responses with finish_reason RECITATION, the request technically succeeds with HTTP 200 — but the output is gone. Here's what actually triggers it and how to recover.
A Personal Secretary AI on Gemini API and Google Workspace — Auth, Orchestration, and Approval Gates
Designing a personal secretary AI across Gmail and Google Calendar with the Gemini API: OAuth2 scope design, Function Calling orchestration, approval gates for write tools, and ninety days of measured production cost, with full Python code.
Building an AI Podcast Pipeline with Gemini 3.1 Flash TTS Emotional Tags and Multi-Speaker — A Complete Commercial Content System
Learn how to build a production-ready AI podcast generation pipeline using Gemini 3.1 Flash TTS's 200+ emotional tags and multi-speaker capabilities. From cost calculations to monetization strategy — everything you need to launch a content service generating $700/month as an indie developer.