Gemini API Key Permission Denied: Fix 403 by Error Source (2026)
A no-retry, evidence-first workflow for AI Studio key creation, Gemini API 403 calls, keys that stopped working in 2026, and account or project escalation.
17 min
API Guides · Page 3 of 3
Step-by-step AI API integration: getting and securing API keys, authentication, endpoints and SDKs, OpenAI-compatible setups, and patterns for production use.
- 62 articles
- Updated Oct 15, 2026
The Model `gpt-image-2` Does Not Exist: Codex Error, Status Check, and Fixes
`gpt-image-2` is documented by OpenAI; when Codex says the model does not exist, the right fix depends on the surface that returned the error.
9 min
Doubao Seed Code: Open Source, API Model, or Coding Plan?
Doubao Seed Code spans open-source Seed-Coder weights, a hosted Volcengine API route, Coding Plan/tool access, Doubao App/TRAE usage, and benchmark pages; choose the route before testing.
10 min
OpenAI vs Claude Cache Pricing: How Cached Tokens, Cache Writes, and Cache Reads Are Billed
OpenAI cache hits are cached input tokens; Claude separates cache writes and reads. Use this dated guide to audit repeated-context API and agent bills.
8 min
How to Set Up DeepSeek on Janitor AI: Proxy URL, Model Name, and Error Fixes
DeepSeek works in Janitor AI only when the proxy URL, API key, and model name all come from the same route; the current setup fields, model-ID warning, and first-error diagnosis path matter before prompt tuning.
10 min
Grok 4.3 API Guide: Model ID, Pricing, Migration, and Test Plan
Grok 4.3 is listed as an xAI API model as of May 7, 2026, but production teams should verify route, price, aliases, context, migration, and same-task results first.
12 min
Gemini API vs Vertex AI API: Which Google Gemini Route Should You Use?
Use the Gemini Developer API for fast starts and simple app integrations. Use Gemini API in Vertex AI when IAM, audit logs, VPC controls, centralized billing, regional controls, or Cloud operations are part of the job.
7 min
Grok Speech-to-Text API: Endpoint, Pricing, Streaming, and When to Use It (April 2026)
Grok Speech-to-Text is now an official xAI API. Use REST for files, WebSocket for live audio, and keep Voice Agent API and TTS for different jobs.
8 min
OpenAI API Key and Organization ID: What You Actually Need in 2026
OpenAI's API auth is project-first now. For most developers, `OPENAI_API_KEY` is enough. Organization ID and project ID still matter, but mainly when you must choose scope explicitly or when you're using admin endpoints rather than normal inference.
10 min
Brave Search API in 2026: Search vs Answers, Pricing, and First Working Requests
If you want the Brave Search API today, start by choosing between Search and Answers. Search is the better default when you want raw results, LLM Context, or specialized search endpoints and still own the application logic yourself. Answers is the OpenAI-compatible path when you want Brave to return the grounded answer.
14 min
Gemini 3.1 Flash Live Free API: Is It Actually Free in 2026?
Gemini 3.1 Flash Live still shows free API pricing in March 2026, but that is only the first layer of the answer. This guide explains what is actually free, where your real limits now live, and when free is the wrong contract for a voice app.
11 min
Gemini 3.1 Flash Live API: Model ID, Pricing, and Quickstart Guide (March 2026)
If you mean Google's new real-time voice model, the official model ID is `gemini-3.1-flash-live-preview` and you use it through the Gemini Live API. Start new voice-agent work on 3.1, but do not assume it is a drop-in replacement for Gemini 2.5 Flash Live.
13 min
Nano Banana 2 Alternative for 429 Errors: What to Use Instead (2026)
A Nano Banana 2 429 error does not always mean you need a new model. This guide shows when to switch to GPT Image 1.5, when FLUX is the better non-Google route, and when the real fix is keeping Nano Banana 2 while changing your quota path.
14 min
Gemini API Error Troubleshooting: Complete Guide to Fix 429, 400, 500 Errors (2026)
Every Gemini API error explained with working fixes. Covers 429 RESOURCE_EXHAUSTED, 400 INVALID_ARGUMENT, 500 INTERNAL, 503 UNAVAILABLE, and 504 DEADLINE_EXCEEDED with production-ready retry code in Python and JavaScript. Includes verified rate limits after the December 2025 free tier cuts.
25 min