Learn the Claude API

Clear, practical guides to getting a key, understanding pricing, choosing a model, and integrating Claude into your tools.

How to Get a Claude API Key
Guide

How to Get a Claude API Key

A step-by-step guide to getting a Claude API key and making your first request — with Python, TypeScript, and curl examples.

Claude API Pricing, Explained
Guide

Claude API Pricing, Explained

Understand how Claude API pricing works — input vs output tokens, prompt caching, and how to estimate the cost of a request.

The Cheapest Way to Use the Claude API
Guide

The Cheapest Way to Use the Claude API

Practical ways to reduce your Claude API bill without losing quality — model selection, prompt caching, output limits, and more.

Unlimited Cursor with the Claude API
Cursor IDE Guide

Unlimited Cursor with the Claude API

Run Cursor IDE on a flat-rate unlimited Claude plan. Full setup walkthrough, advanced workflows, model selection, troubleshooting, and why unlimited fits heavy Cursor usage.

Unlimited Claude Code Access
Claude Code CLI Guide

Unlimited Claude Code Access

Run Claude Code CLI on a flat-rate unlimited API. Environment variables, model mapping, subagents, agent teams, headless mode, and why unlimited access fits Claude Code's quadratic token growth.

Claude API Gateway vs. Anthropic Direct
Guide

Claude API Gateway vs. Anthropic Direct

An honest comparison of using a Claude API gateway versus the Anthropic API directly — cost, access, and trade-offs.

Using Claude Through an OpenAI-Compatible API
Guide

Using Claude Through an OpenAI-Compatible API

Call Claude models using the OpenAI Chat Completions format — useful for tools and SDKs built around OpenAI.

Claude Models Compared
Guide

Claude Models Compared

A practical comparison of the Claude model family — Opus 4.8, Sonnet 4.6, Haiku 4.5, and Fable 5 — and when to use each.

What 'Unlimited' Claude API Access Means
Guide

What 'Unlimited' Claude API Access Means

An honest look at flat-rate unlimited Claude plans — how they work, fair-use rate limits, and who they suit.

Paying for the Claude API with Crypto
Guide

Paying for the Claude API with Crypto

How to pay for Claude API access using cryptocurrency — supported coins and how the prepaid balance works.

Claude API Access Without a Waitlist
Guide

Claude API Access Without a Waitlist

Get Claude API access instantly without an Anthropic account or waitlist, in most regions worldwide.

How to Reduce Claude Token Usage
Guide

How to Reduce Claude Token Usage

Concrete techniques to use fewer tokens on the Claude API without hurting output quality.

Unlimited Cline with the Claude API
Cline Extension Guide

Unlimited Cline with the Claude API

Connect Cline to a flat-rate unlimited Claude API. Full setup for Anthropic and OpenAI-compatible providers, Plan/Act mode, MCP, Computer Use, and why unlimited fits Cline's heavy token consumption.

Unlimited Roo Code with the Claude API
Roo Code Extension Guide

Unlimited Roo Code with the Claude API

Run Roo Code on a flat-rate unlimited Claude API. Configuration profiles, per-mode model assignment, Orchestrator subtasks, custom .roomodes, and why unlimited access fits Roo Code's multiplied API consumption.

Unlimited Claude in JetBrains IDEs
JetBrains IDE Guide

Unlimited Claude in JetBrains IDEs

Connect any JetBrains IDE to flat-rate unlimited Claude via the Continue plugin. Shared config.yaml, provider setup, role assignments, per-project overrides, and why unlimited fits JetBrains heavy workflows.

Unlimited Aider with the Claude API
Aider CLI Guide

Unlimited Aider with the Claude API

Connect Aider to a flat-rate unlimited Claude API. Native Anthropic path, OpenAI-compatible path, architect mode, repo map, weak-model split, and why unlimited access matches Aider's multi-call refactoring style.

Unlimited Claude in VS Code
VS Code Integration Guide

Unlimited Claude in VS Code

Three paths to unlimited Claude in VS Code: Continue for chat and inline edits, Cline for full autonomous agents, Roo Code for orchestrated multi-mode workflows. Setup comparison, when to use each, and why unlimited access fits VS Code's always-on AI usage.

Unlimited OpenCode with the Claude API
OpenCode CLI Guide

Unlimited OpenCode with the Claude API

Configure OpenCode with a flat-rate unlimited Claude API. Custom providers in opencode.json, parallel subagents, Build/Plan agents, MCP integration, and why unlimited suits OpenCode's continuous terminal workflows.

Running an Unlimited Hermes Agent on Claude
Hermes Agent Guide

Running an Unlimited Hermes Agent on Claude

Deploy Hermes Agent on flat-rate unlimited Claude. Environment setup, custom providers, subagent delegation, cron scheduling, multi-channel gateway, learning loops, and why unlimited fits Hermes's 24/7 autonomous operation.

Running Unlimited OpenClaw on Claude
OpenClaw Gateway Guide

Running Unlimited OpenClaw on Claude

Deploy OpenClaw on flat-rate unlimited Claude. Provider configuration in openclaw.json, anthropic-messages API type, hub-and-spoke gateway, 50+ channels, skills injection, and why unlimited fits OpenClaw's always-on multi-channel inference.

What an Anthropic-Compatible API Means
Guide

What an Anthropic-Compatible API Means

Understand Anthropic-compatible APIs - the Messages API format, and how a drop-in gateway works with existing Claude code.

Claude Code API Key — How to Get and Set Up
Setup Guide

Claude Code API Key — How to Get and Set Up

Claude Code API Costs — Pricing and How to Cut Them
Pricing Guide

Claude Code API Costs — Pricing and How to Cut Them

Understand real Claude Code API costs, why token usage grows quadratically, and how unlimited flat-rate plans eliminate unpredictable billing.

Claude API Errors — Rate Limits, 400, 500, 529 Fixes
Troubleshooting Guide

Claude API Errors — Rate Limits, 400, 500, 529 Fixes

Fix Claude API errors: 400 bad request, 429 rate limit reached, 500 server error, and 529 overloaded_error. Real causes, retry logic, and how a gateway reduces them.

How to Buy Claude API Credits
Purchase Guide

How to Buy Claude API Credits

Unlimited Claude Usage — Plans and Pricing
Plans & Pricing

Unlimited Claude Usage — Plans and Pricing

Unlimited Claude usage plans explained — 1-day and 1-week flat-rate pricing, what unlimited means, included models, how to extend, and comparison to Anthropic limits.

Unlimited Claude Opus 4.8 Access
Opus Access Guide

Unlimited Claude Opus 4.8 Access

Get unlimited access to Claude Opus 4.8 — the strongest reasoning model with 1M context. Why Opus is expensive, who needs it, and how flat-rate access removes the cost barrier.

Claude API Free Trial — Get $5 Free Credit
Free Credit Guide

Claude API Free Trial — Get $5 Free Credit

Honest answer on free API access and the upgrade path to unlimited.

Claude API vs Claude Pro/Max Subscription — Which to Choose
Comparison Guide

Claude API vs Claude Pro/Max Subscription — Which to Choose

Honest comparison of Claude API access vs Claude Pro and Max subscriptions — features, limits, pricing, and which fits developers vs casual users.

Unlimited Claude Code Usage — No Token Limits
No Token Limits

Unlimited Claude Code Usage — No Token Limits

Remove token limits from Claude Code with flat-rate unlimited access. Why official plans hit limits fast, setup in 2 env vars, and workflows that become possible without caps.

How to Get Unlimited Claude Usage
Complete Guide

How to Get Unlimited Claude Usage

The honest breakdown of all ways to get unlimited Claude usage — Max subscription limits, flat-rate gateways, why free unlimited does not exist, and step-by-step setup.

How to Get an Unlimited Claude API Key
Getting Started Guide

How to Get an Unlimited Claude API Key

Get a flat-rate unlimited Claude API key with no per-token billing. How it works, what unlimited means in practice, supported models, fair-use rate limits, setup steps, and common questions about unlimited Claude access.

Running Codex on Unlimited Claude
Codex Guide

Running Codex on Unlimited Claude

Drive the Codex CLI with Claude on a flat-rate unlimited plan — config.toml custom provider, wire protocol, and why long autonomous Codex runs suit unlimited.

Running n8n Workflows on Unlimited Claude
n8n Guide

Running n8n Workflows on Unlimited Claude

Route n8n's Anthropic node to a flat-rate unlimited Claude plan, fix the '/v1/models' credential failure, and let scheduled workflows run without a token meter.

Putting Unlimited Claude Behind LiteLLM
LiteLLM Guide

Putting Unlimited Claude Behind LiteLLM

Route LiteLLM to a flat-rate unlimited Claude plan — model_list prefix, api_base, the suffix gotcha, and why the proxy's concentrated volume is the perfect unlimited case.

Running Kilo Code on Unlimited Claude
Kilo Code Guide

Running Kilo Code on Unlimited Claude

Set up Kilo Code to drive Claude on a flat-rate unlimited plan — provider choice, custom base URL, free-text model id, and why agentic loops suit unlimited.

Run GitHub Copilot on Unlimited Claude
Copilot Guide

Run GitHub Copilot on Unlimited Claude

Add Claude to GitHub Copilot with a flat-rate unlimited plan — Custom Endpoint, Messages API type, and why agent-mode runs that churn through tokens are exactly the workload unlimited is built for.

Run Zed on Unlimited Claude
Zed Guide

Run Zed on Unlimited Claude

Point the Zed editor at a flat-rate unlimited Claude plan. Use the openai_compatible block (the native Anthropic provider has no api_url override), declare your models, and let Zed's assistant run without watching a token meter.

Run Cherry Studio on Unlimited Claude
Cherry Studio Guide

Run Cherry Studio on Unlimited Claude

Add Claude to Cherry Studio on a flat-rate unlimited plan — Anthropic-type provider, API Host at the host root (no /v1), the trailing-# lock, and why heavy desktop chatting suits unlimited.

Build LangChain on Unlimited Claude
LangChain Guide

Build LangChain on Unlimited Claude

Drive Claude from LangChain on a flat-rate unlimited plan — ChatAnthropic with base_url at the root, the env-var route, the ChatOpenAI /v1 variant, and why chains and agents that fan out love unlimited.

Run Factory Droid on Unlimited Claude
Factory Droid Guide

Run Factory Droid on Unlimited Claude

Drive Factory's Droid CLI with Claude on a flat-rate unlimited plan — customModels in settings.json, provider anthropic, ${VAR} apiKey, and why an agentic CLI that loops hard belongs on unlimited.