#Claude API articles

claude code apiの使い方｜キー設定・料金・SDKの違い

claude code apiを使うには何が必要？Claude ConsoleのAPIキー設定、Pro・Maxなどのサブスクとの料金の違い、CLI・SDK・Routinesの使い分けを公式情報で整理。認証エラーを防ぐ環境変数の設定と安全なキー管理、最短で動かす手順まで解説します。

claude workbenchとは？使い方・API検証・保存機能の変更点

claude workbenchの意味やClaude Consoleでの開き方、プロンプト実行、モデル設定、ツール・構造化出力、コード書き出しまでを整理。新旧Workbenchの保存機能の違いと、2026年8月17日の旧版終了前に確認したいデータ移行も公式情報で解説します。

Claude は API なのか｜アプリ・API・Claude Code の違い

「is Claude an API?」という疑問に答えます。Claude はチャットアプリ・Claude API・Claude Code の 3 形態を持つ製品群の名称。それぞれの課金方式・用途・アクセス方法の違いと選び方を整理します。

Claude API レート制限引き上げ｜Opus 水準統一と設計変更の要点

Anthropic 速報｜Claude API レート制限引き上げと v2.1.195

2026-06-28 の Anthropic 速報。Claude API のレート制限が全使用階層で Opus 同水準に引き上げられ、使用階層が Start・Build・Scale の3段に統合。Claude Code v2.1.195 では日本語・中国語の音声入力 auto-submit バグが修正された。

Building Apps with Claude | Choosing Between SDK, API, and MCP with Configuration Examples

Claude API Pricing | Cost Optimization with Per-Model Rates and Reduction Techniques

A practical breakdown of Claude API costs: per-token rates for the latest models, monthly estimates, 90% savings with prompt caching, and 50% discounts via Batch API. June 2026 edition.

How to Use Claude API on Google | Vertex AI Setup and Pricing

A practical guide to calling the Claude API via Google Cloud Vertex AI Model Garden — covering activation, authentication, Python samples, pricing, regions, and how it compares to the direct Anthropic API.

Region Settings for Using Claude on Vertex AI | global vs us & eu

OpenAI vs Claude API Comparison | Pricing, Performance, and Migration Guide

Cline + Claude Cost Guide | API Pricing vs. Subscription & Money-Saving Tips

A clear breakdown of what it costs to use Claude with Cline, and how to cut that bill. Cline itself is free — you only pay Anthropic API usage fees. Claude Pro/Max subscriptions cannot be used with Cline. Learn how prompt caching can dramatically reduce your monthly spend.

Claude × n8n Integration | API Setup, AI Agent & MCP Usage Guide

A complete guide to building AI Agent and MCP workflows by integrating Claude with n8n. Implement no-code automations like 'email summarization → Slack forwarding' and 'inquiry classification → routing' — and with MCP integration established from 2025 onward, you can design and run n8n workflows using natural language directly from Claude Desktop or Claude Code.

How to Use Claude Remote MCP | OAuth Authentication and API Setup Explained

A complete guide to connecting Claude Remote MCP from both Claude.ai and the Claude API. On Claude.ai, just paste the URL in Connectors and complete OAuth in one click. For the API, use the beta header mcp-client-2025-11-20 to connect multiple servers simultaneously. Free plans allow one simultaneous connection; Pro and above support multiple connections.

What Are Claude Managed Agents | Dreaming, Outcomes, and Feature Overview

A guide to using Dreaming and Outcomes in Claude Managed Agents. Defining rubrics improves task success rates by up to 10 points, and multi-agent setups can be individually audited in the Console.

Anthropic Enterprise Claude Implementation Support | Demand for Field Engineers

What Anthropic's new enterprise implementation company — co-founded with Blackstone and others — means for the industry, and how it opens up Claude project opportunities for individual engineers. We break down the shift from API provider to on-site partner model, and the realistic path to winning work through industry-specific modules.

Sonnet 4.5's 1M Token Beta Ends | Complete Migration Guide to Sonnet 4.6

What was deprecated is the Sonnet 4.5 beta header (context-1m-2025-08-07), not Sonnet 4.6 itself — Sonnet 4.6 ships with 1M token support as a standard feature. Migration requires just two changes: updating the model ID and removing the header, completable in a few lines.