# AI tools for “API Usage”

1,365 matching tools; showing 24, ranked by relevance.

Filters: `group=coding-development`, `platform=website`

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 | [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; keywords 100%; semantic match | [.md](https://openaitools.app/tool/openrouter-ai.md) |
| 2 | [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) |
| 3 | [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) |
| 4 | [CometAPI](https://openaitools.app/tool/cometapi) | 602,966 | +49.7% | Pay-as-you-go (credits) | One OpenAI-compatible API key for 500+ AI models | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/cometapi.md) |
| 5 | [LLM Gateway](https://openaitools.app/tool/llm-gateway) | 168,426 | -14.5% | Freemium, Contact for Pricing | One OpenAI-compatible API to route, monitor and control 250+ LLM models | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/llm-gateway.md) |
| 6 | [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 | [.md](https://openaitools.app/tool/deepseek.md) |
| 7 | [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 | [.md](https://openaitools.app/tool/google-ai-studio.md) |
| 8 | [RouterBase](https://openaitools.app/tool/routerbase) | 8,326 | +33.7% | Paid | One OpenAI-compatible API for 200+ AI models | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/routerbase.md) |
| 9 | [AnythingLLM](https://openaitools.app/tool/anythingllm) | 512,269 | +12.9% | Freemium | Own your intelligence: a private AI assistant that runs entirely on your machine | category: ai-api; keywords 100% | [.md](https://openaitools.app/tool/anythingllm.md) |
| 10 | [DeepL](https://openaitools.app/tool/deepl) | 95,110,871 | -1.7% | Freemium | Enterprise-grade neural machine translation, AI writing refinement, and real-time voice translation across thirty-plus global languages. | category: ai-api | [.md](https://openaitools.app/tool/deepl.md) |
| 11 | [Defapi](https://openaitools.app/tool/defapi) | 45,178 | +585.7% | Paid | Enterprise-grade gateway to hundreds of AI models through one API | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/defapi.md) |
| 12 | [Browser Use](https://openaitools.app/tool/browser-use) | 1,206,376 | +41.1% | Freemium, Paid, Contact for Pricing | Browser agents and stealth cloud browsers for real web tasks | category: ai-api; semantic match | [.md](https://openaitools.app/tool/browser-use.md) |
| 13 | [Credyt](https://openaitools.app/tool/credyt) | 5,188 | +14.1% | Freemium | Real-time monetization and usage-based billing infrastructure for AI products | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/credyt.md) |
| 14 | [ElevenLabs](https://openaitools.app/tool/elevenlabs-io) | 42,396,771 | +26.1% | Freemium, Paid, Contact for Pricing | AI audio platform for speech, agents, music and dubbing | category: ai-api | [.md](https://openaitools.app/tool/elevenlabs-io.md) |
| 15 | [Atlas Cloud](https://openaitools.app/tool/atlas-cloud) | 777,031 | -16.4% | Paid | One OpenAI-compatible API for 500+ image, video, audio, and LLM models | category: ai-api; semantic match | [.md](https://openaitools.app/tool/atlas-cloud.md) |
| 16 | [CodeGateway](https://openaitools.app/tool/codegateway) | 3,745 | +0.6% | Free Trial, Paid | One API key, one invoice for Claude, GPT and Gemini | category: ai-api; keywords 100% | [.md](https://openaitools.app/tool/codegateway.md) |
| 17 | [AI/ML API](https://openaitools.app/tool/ai-ml-api) | 232,946 | -20.1% | Pay-as-you-go credits (free to start); enterprise custom pricing on request | One universal API for 500+ AI models and 1,000+ agentic tools | category: ai-api; semantic match | [.md](https://openaitools.app/tool/ai-ml-api.md) |
| 18 | [ZeroGPT](https://openaitools.app/tool/zerogpt) | 32,864,541 | +19.7% | Freemium, Paid | AI content detection and a full writing toolkit in one place | category: ai-api | [.md](https://openaitools.app/tool/zerogpt.md) |
| 19 | [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 | [.md](https://openaitools.app/tool/qwen-4.md) |
| 20 | [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) |
| 21 | [FaceSearch](https://openaitools.app/tool/facesearch-ai) | 167,598 | +66.6% | Freemium | Upload one photo and find where that face appears across social media and the web | category: ai-api; keywords 100% | [.md](https://openaitools.app/tool/facesearch-ai.md) |
| 22 | [Tripo AI](https://openaitools.app/tool/tripo-ai) | 25,209,679 | +73.2% | Freemium | Create 3D models from text and images in seconds | category: ai-api | [.md](https://openaitools.app/tool/tripo-ai.md) |
| 23 | [GPTZero](https://openaitools.app/tool/gptzero-me) | 23,246,989 | +32.5% | Freemium, Paid | AI detection and writing verification built for schools and editors | category: ai-api | [.md](https://openaitools.app/tool/gptzero-me.md) |
| 24 | [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) |

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

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