# AI tools for “Third-party API”

2,000 matching tools; showing 24, ranked by relevance.

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 | [Composio](https://openaitools.app/tool/composio) | 2,782,603 | +22.8% | Freemium, Contact for Pricing | Give your AI agents secure, authenticated access to 1,700+ apps | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/composio.md) |
| 2 | [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) |
| 3 | [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) |
| 4 | [useapi.net](https://openaitools.app/tool/third-party-api-for-popular-ai-services) | 27,680 | -12.8% | Paid | One subscription, rest APIs for Google Flow, Kling, Runway, MiniMax, Mureka and more | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/third-party-api-for-popular-ai-services.md) |
| 5 | [GPTProto](https://openaitools.app/tool/gptproto) | 148,457 | +15.4% | Pay-as-you-go | One API key, one balance, 200+ text, image, video and audio models | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/gptproto.md) |
| 6 | [BypassGPT](https://openaitools.app/tool/bypassgpt-ai) | 366,203 | +14.6% | Freemium, Paid | Humanize AI text and slip past AI detectors | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/bypassgpt-ai.md) |
| 7 | [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) |
| 8 | [Nano Banana Pro API (Kie.ai)](https://openaitools.app/tool/nano-banana-pro-api-kie-ai) | 2,275,553 | -22.4% | Paid (credit-based, pay-as-you-go) | Low-cost API access to Google's Nano Banana Pro image model | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/nano-banana-pro-api-kie-ai.md) |
| 9 | [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) |
| 10 | [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) |
| 11 | [Wan 3](https://openaitools.app/tool/wan-3) | 99,803 | -29.9% | Freemium, Contact for Pricing, Free | Text-to-video generator for cinematic clips with synced audio | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/wan-3.md) |
| 12 | [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) |
| 13 | [Thomson Reuters](https://openaitools.app/tool/thomson-reuters) | 17,919,413 | +5.5% | Contact for Pricing | Purpose-built AI and trusted content for legal, tax, risk and trade professionals | category: ai-api; semantic match | [.md](https://openaitools.app/tool/thomson-reuters.md) |
| 14 | [Composio MCP](https://openaitools.app/tool/composio-mcp) | 2,782,603 | +22.8% | Freemium, Contact for Pricing | One managed MCP endpoint for 1,700+ apps in Claude, ChatGPT, Codex, and Cursor | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/composio-mcp.md) |
| 15 | [AI Video API](https://openaitools.app/tool/ai-video-api-1) | 3,754 | +49.2% | Paid | One API key for top AI video and image generation models at below-official prices | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/ai-video-api-1.md) |
| 16 | [Corsair](https://openaitools.app/tool/corsair) | 8,754 | -43.2% | Freemium, Contact for Pricing | Open-source integration layer that gives AI agents secure, multi-tenant access to 400+ apps | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/corsair.md) |
| 17 | [GPTZZZ (GPT中转站)](https://openaitools.app/tool/gpt%E4%B8%AD%E8%BD%AC%E7%AB%99) | 1,037 | 0% | Pay-as-you-go prepaid balance | Third-party API relay that puts Claude, GPT, Grok and more behind one balance and one Base URL | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/gpt%E4%B8%AD%E8%BD%AC%E7%AB%99.md) |
| 18 | [Linked API](https://openaitools.app/tool/linked-api) | 38,687 | -8.1% | Paid | LinkedIn automation API for leads, outreach and AI agents | keywords 100%; semantic match | [.md](https://openaitools.app/tool/linked-api.md) |
| 19 | [Groq](https://openaitools.app/tool/groq) | 3,987,936 | +10% | Paid | Ultra-fast AI inference on the LPU and LPX platform | category: ai-api; semantic match | [.md](https://openaitools.app/tool/groq.md) |
| 20 | [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) |
| 21 | [Seedance 2 API - Poyo.ai](https://openaitools.app/tool/seedance-2-api-poyo-ai) | 126,258 | -16.2% | Paid | ByteDance's Seedance 2 video model via API with native audio and multi-shot storytelling | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/seedance-2-api-poyo-ai.md) |
| 22 | [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) |
| 23 | [LiteLLM](https://openaitools.app/tool/litellm) | 576,967 | +7.9% | Freemium, Contact for Pricing | One open-source AI gateway for 100+ LLM providers | category: ai-api; semantic match | [.md](https://openaitools.app/tool/litellm.md) |
| 24 | [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) |

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Source: https://openaitools.app/?q=Third-party%20API

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