AI Services in API & SDK

Services that expose functionality as APIs and SDKs for developersFeaturing 16 AI services in total.

ディファイ

Dify

Dify is an open-source LLM app development platform for building, deploying, and operating AI apps, agents, and workflows with no-code/low-code. You can assemble chatbots, RAG, and multi-step workflows visually, and switch between the major providers' models. It supports both a cloud edition and self-hosting (OSS). Cloud pricing is Sandbox free / Professional $590 per year / Team $1,590 per year / Enterprise custom (17% off with annual billing), and the self-hosted Community edition is free.

# AIチャットボット# AIエージェント# ノーコード自動化# API・SDK# 業務効率化# 日本語対応

アジェンタ

Agenta

An open-source (MIT) workspace for building and running AI agents. Build agents by chatting, connect them to your apps, and run them in the background with approval flows, tracing, and version history. Positioned as "the open-source workspace for your agents," it supports 1,000+ integrations (MCP/Composio) and is model-agnostic. Self-hosting is free, with a cloud version available.

# AIモデル構築・管理# AIエージェント# API・SDK# 生成AI（LLM）

スピークイージー

Speakeasy

A developer platform that auto-generates type-safe, production-ready SDKs in multiple languages (TypeScript, Python, Go, Java, C#, PHP, Ruby) from an OpenAPI spec. It also generates MCP servers, Terraform providers, and CLIs, and in 2026 has expanded into an "AI control plane" for discovering, securing, and governing AI agents and MCP servers across the enterprise.

# API・SDK# コード生成# AIエージェント

クレイドエーアイ

Claid.ai

A product-photography platform (Claid.ai by Let's Enhance) that generates and enhances e-commerce product images and fashion photos with AI. It supports AI photoshoots, background generation/removal, on-model fashion shots, image-to-video, up to 4K upscaling, and light/color correction, and can automate bulk processing via a web app and an API.

# 画像生成# デザイン生成# 小売・EC# API・SDK

レストビーエーアイ

Restb.ai

A computer-vision AI company for real estate that analyzes property photos to extract 'visual insights' — auto-tagging of rooms and features, property-condition analysis, photo compliance, watermark/duplicate detection, comparable properties, and image captions. It provides the visual-intelligence layer behind MLSs, portals, AVMs/appraisals, and insurers. Pricing is not public (contact/API).

# 不動産# 顔認証・画像解析# API・SDK

フラックス

FLUX

A family of frontier image-generation and editing models from Germany's Black Forest Labs (founded by Stable Diffusion's creators). The current still-image workhorse is the FLUX.2 generation, with the multimodal FLUX 3 as the newest. Strong at photorealism, prompt adherence, in-image text, and editing (Kontext); usable via Playground/API/open weights on pay-as-you-go (1 credit = $0.01).

# 画像生成# デザイン生成# API・SDK

クライン

Cline

Cline is an open-source AI coding agent that runs inside the editor and terminal you already use (built by Cline Bot Inc., Apache 2.0). You can use the same agent from a VS Code extension, JetBrains, a CLI, or an SDK, and with Plan/Act it separates planning from execution so you approve as it goes, autonomously handling multi-file edits and command execution. It supports every provider — Claude, GPT, Gemini, local models and more — and with bring your own key there is no vendor lock-in. The extension and CLI are open source and free for individuals (the only cost is usage-based model inference). Used by more than 8 million developers, with 66,000 GitHub stars.

# コード生成# AIモデル構築・管理# API・SDK# AIエージェント

ギットハブ コパイロット

GitHub Copilot

GitHub Copilot is an AI coding assistance service provided by GitHub (a Microsoft subsidiary). In addition to code completion, it includes an agent mode that implements autonomously, a cloud agent that works in the cloud, automatic PR review, and the Copilot CLI. It can be used in VS Code, JetBrains, GitHub, the terminal, and more, and you can choose from major models such as Claude, GPT, and Gemini. For individuals there is the free Free plan, Pro $10, Pro+ $39, and Max $100; for businesses there are Business $19 and Enterprise $39 (per user/month, on a GitHub AI credit system).

# コード生成# AIモデル構築・管理# API・SDK# AIエージェント

グーグル エーアイ スタジオ

Google AI Studio

Google AI Studio is Google's developer platform to try the Gemini models in the browser, build and deploy AI apps, and get a Gemini API key. It's organized around Build (app generation), Chat, Stream, and Generate Media (image/video/audio), and offers the Gemini 3 family, Nano Banana image, Veo video, and more. AI Studio itself is free; the API is usage-based with a free tier. Note: on the free tier input is used to improve products; on the paid tier it is not.

# 生成AI（LLM）# AIモデル構築・管理# API・SDK# AIエージェント

マストラ

Mastra

An open-source AI agent development framework written in TypeScript. It integrates Agents/Tools/Workflows/RAG/Memory/Evals/Observability and lets you switch among LLMs like OpenAI, Anthropic, and Google Gemini. Under "build, observe, and improve," it suits building and running agents that run for days. The framework is free (OSS), with a hosted Mastra Platform available.

# コード生成# AIモデル構築・管理# API・SDK# AIエージェント

トラエ

Trae

An AI-native IDE developed by ByteDance. Built on VS Code, it lets you switch between an IDE mode you control yourself and a SOLO mode where AI autonomously handles everything from requirements to implementation, testing, and deployment. It has the GPT-5 series, Gemini 3 series, Kimi, MiniMax, and ByteDance Seed built in, with Claude and others addable as custom models via API key. Pricing is token-based, from a free tier up to Ultra $100.

# コード生成# AIエージェント# API・SDK# 生産性向上# 日本語対応

キミ

Kimi

Kimi is an AI chat and agent service from Beijing-based Moonshot AI. Its open-weights flagship model Kimi K3 handles a 1M-token context with image and video input, and can take on slide creation, Deep Research, and coding. Chat is free, paid plans start at $19/month, and the API is priced in USD. The UI is mainly English/Chinese, but Japanese input and output work.

# 生成AI（LLM）# AIチャットボット# テキスト生成# コード生成# AIエージェント# API・SDK

シーダンス

Seedance

Seedance is an AI video generation model developed by ByteDance (China). The latest Seedance 2.5 supports up to 30 seconds of continuous generation and up to 50 reference assets (images, video, audio). General users access it via Dreamina international or CapCut; developers use the BytePlus API. Free daily credits are available, with USD-based credit plans and pay-as-you-go API pricing.

# 動画生成# 品質向上・クリエイティブ支援# API・SDK# アイデア支援／創造ツール# マーケティング

シードリーム

Seedream

Seedream is an image generation and editing AI model family developed by ByteDance's Seed research team. The latest Seedream 5.0 excels at precise editing including layer separation and multilingual text rendering. Individuals can use it via Dreamina (free daily credits, Japanese UI); developers via the BytePlus API from $0.035 per output image (USD billing).

# 画像生成# デザイン生成# API・SDK# 品質向上・クリエイティブ支援# 日本語対応

ワン

Wan

Wan (Tongyi Wanxiang) is Alibaba's family of AI video and image generation models with an official online service. Wan2.1/2.2 are open models under Apache 2.0, and the latest Wan 3.0 (beta) supports native 30-second generation. Free daily credits on wan.video, with paid plans from $5/month (billed yearly); billing is in US dollars.

# 動画生成# 画像生成# 品質向上・クリエイティブ支援# API・SDK# アイデア支援／創造ツール

キロコード

Kilo Code

Kilo Code is an MIT-licensed open-source AI coding agent that runs the same way in VS Code, JetBrains, the CLI, and the cloud. You switch between purpose-built agents — Code, Plan, Ask, Debug, and Review — to generate code, refactor, chase bugs, and review changes. It supports 500+ models with mid-task switching, and charges no markup on AI inference: you pay the provider's rate. You can bring your own API keys or run local models with Ollama. Platform access is free for individuals and $15 per user per month for Teams. Anaconda acquired the company in July 2026, and Kilo Code now has more than 3 million users.

# コード生成# AIエージェント# API・SDK# 生産性向上# 日本語対応

Recommended Articles on API & SDK

[2026 Edition] 20 AI Tools Transforming Developer Workflows | Coding Assistance, Automated Code Review, No-Code Web Development, and Workflow Automation

A curated look at the best AI tools for developers in 2026. Covers 18 tools across coding assistance, automated code review, no-code development, and workflow automation — all aimed at improving productivity.

Autonomous AI Agents Compared: 7 Picks for August 2026 — Grok Bot, Manus, Devin and How to Choose

You tried an AI agent and it ended at "wow, impressive" — because what it returned was an answer, not finished work. That changed in August 2026, when products that leave the work inside your actual tools arrived all at once. This article compares seven of them — Grok Bot, Hey Noah, Manus, Genspark AI, Devin, Kilo Code, and Cloudflare OS — along a single axis: where the output lands. It covers the unit of isolation, how much access you hand over, the three layers of cost, and where to start, all from primary sources.