# AI tools for “API Development”

1,687 matching tools; showing 24, ranked by relevance.

Filters: `group=coding-development`

Related categories: [ai-api](https://openaitools.app/category/ai-api.md)

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Why it matched | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [Google AI Studio](https://openaitools.app/tool/google-ai-studio) | 112,620,020 | +2% | Freemium | Google's rapid prototyping IDE and developer API workbench for building multimodal applications with Gemini models. | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/google-ai-studio.md) |
| 2 | [Postman](https://openaitools.app/tool/postman) | 1,764,877 | -7.6% | Freemium | Design, test, and govern APIs — now with AI agents in the loop | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/postman.md) |
| 3 | [OpenAI Platform](https://openaitools.app/tool/openai) | 234,678,639 | -9.6% | Paid | Enterprise developer platform and API for deploying GPT-6 Astra, Sol, Luna, and realtime multimodal agents. | category: ai-api; semantic match | [.md](https://openaitools.app/tool/openai.md) |
| 4 | [DeepSeek](https://openaitools.app/tool/deepseek) | 372,761,591 | +4.3% | Freemium | High-efficiency open-weight and hosted reasoning AI powered by DeepSeek-V4 and R1 at ultra-low token costs. | category: ai-api; keywords 100% | [.md](https://openaitools.app/tool/deepseek.md) |
| 5 | [OfoxAI](https://openaitools.app/tool/ofoxai) | 239,718 | +12.7% | — | One API key, 100+ LLMs, official pricing with no platform markup | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/ofoxai.md) |
| 6 | [APIMart](https://openaitools.app/tool/apimart) | 383,148 | +6.3% | Freemium, Paid | One OpenAI-compatible API for 190+ text, image, video and audio models | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/apimart.md) |
| 7 | [Merge](https://openaitools.app/tool/merge-dev) | 313,201 | +1.7% | Freemium, Contact for Pricing | The universal context engine connecting agents to data, tools, and models | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/merge-dev.md) |
| 8 | [APIMaster](https://openaitools.app/tool/apimaster) | 210,182 | +46.3% | Paid | One OpenAI-compatible key for discounted GPT, Claude and Gemini access | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/apimaster.md) |
| 9 | [Crazyrouter](https://openaitools.app/tool/crazyrouter) | 77,144 | +1.8% | Paid | One API key, hundreds of AI models behind a single endpoint | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/crazyrouter.md) |
| 10 | [OpenRouter](https://openaitools.app/tool/openrouter-ai) | 19,941,437 | -6.2% | Paid | One API key for hundreds of AI models from every major provider | category: ai-api; semantic match | [.md](https://openaitools.app/tool/openrouter-ai.md) |
| 11 | [Xano](https://openaitools.app/tool/xano) | 77,319 | -20% | Freemium | Build, run and govern AI-ready backends, APIs and MCP servers | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/xano.md) |
| 12 | [ApiPass](https://openaitools.app/tool/apipass-api-marketplace) | 64,237 | -8.3% | Pay-per-use / Usage-based credits | One API key for 180+ leading AI models at a fraction of official pricing | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/apipass-api-marketplace.md) |
| 13 | [APIPod](https://openaitools.app/tool/apipod) | 29,451 | +3.4% | Free Trial, Paid | One AI media API for image, video and LLM models | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/apipod.md) |
| 14 | [Wokey](https://openaitools.app/tool/wokey) | 55,092 | +202.2% | Paid | One verifiable API key for Claude, GPT, Kimi and Grok at a fraction of list price | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/wokey.md) |
| 15 | [Kie.ai](https://openaitools.app/tool/kie-ai-affordable-secure-deepseek-r1-api) | 2,275,553 | -22.4% | Pay-as-you-go | One API key for video, image, music, and chat models | category: ai-api; semantic match | [.md](https://openaitools.app/tool/kie-ai-affordable-secure-deepseek-r1-api.md) |
| 16 | [Enter Pro](https://openaitools.app/tool/enter-pro) | 123,243 | +18.1% | Freemium | Build and deploy apps, websites and AI agents from a prompt | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/enter-pro.md) |
| 17 | [RealEstateAPI](https://openaitools.app/tool/realestateapi-com) | 14,589 | +3.4% | Contact for Pricing | Developer-first API for U.S. property data, valuations and address verification | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/realestateapi-com.md) |
| 18 | [Claude Code Direct-Connect API (Apito)](https://openaitools.app/tool/claude-code%E4%B8%AD%E8%BD%AC%E7%AB%99api) | 4,675 | -92.3% | Paid | A reliable direct-connect proxy for the Anthropic Claude API | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/claude-code%E4%B8%AD%E8%BD%AC%E7%AB%99api.md) |
| 19 | [reAPI](https://openaitools.app/tool/reapi) | 20,221 | +888.3% | Paid | One OpenAI-compatible API across image, video, chat, music and code models | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/reapi.md) |
| 20 | [Claude](https://openaitools.app/tool/claude-2) | 1,253,439,413 | +23.8% | Freemium | Anthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing. | category: ai-api | [.md](https://openaitools.app/tool/claude-2.md) |
| 21 | [BigModel](https://openaitools.app/tool/bigmodel) | 5,700,686 | -17% | Freemium | Zhipu AI's open platform for GLM large models, multimodal APIs, and agent building | category: ai-api; semantic match | [.md](https://openaitools.app/tool/bigmodel.md) |
| 22 | [Qwen 4 (Alibaba Qwen4)](https://openaitools.app/tool/qwen-4) | 35,101,353 | -6.2% | Freemium | Alibaba Cloud's 4th-generation multimodal AI assistant and foundation model lineup (Qwen4-Max, Qwen4-Plus, Qwen4-Flash & open-weight Qwen4-27B) with 1M context. | category: ai-api; keywords 100% | [.md](https://openaitools.app/tool/qwen-4.md) |
| 23 | [EvoLink AI Model API](https://openaitools.app/tool/evolink-ai-model-api) | 312,573 | -27% | Free Trial, Paid, Contact for Pricing | One API for LLM, image, video, and audio models in production | category: ai-api; semantic match | [.md](https://openaitools.app/tool/evolink-ai-model-api.md) |
| 24 | [TinyFish](https://openaitools.app/tool/tinyfish) | 1,124,952 | +199.7% | Freemium, Contact for Pricing | One API key for agent-grade web search, fetch, browsing and automation | category: ai-api; semantic match | [.md](https://openaitools.app/tool/tinyfish.md) |

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Source: https://openaitools.app/?q=API%20Development

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