# AI tools for “Custom API integration”

1,346 matching tools; showing 24, ranked by relevance.

Filters: `group=coding-development`

Related categories: [ai-customer-service](https://openaitools.app/category/ai-customer-service.md), [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 | [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; keywords 100%; semantic match | [.md](https://openaitools.app/tool/openai.md) |
| 2 | [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) |
| 3 | [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 69%; semantic match | [.md](https://openaitools.app/tool/openrouter-ai.md) |
| 4 | [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 69%; semantic match | [.md](https://openaitools.app/tool/composio.md) |
| 5 | [Chat Data](https://openaitools.app/tool/chat-data) | 181,358 | +275.8% | Freemium, Paid | Build custom AI agents and support chatbots trained on your own data, across every channel | category: ai-customer-service, ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/chat-data.md) |
| 6 | [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; keywords 69%; semantic match | [.md](https://openaitools.app/tool/kie-ai-affordable-secure-deepseek-r1-api.md) |
| 7 | [Groq](https://openaitools.app/tool/groq) | 3,987,936 | +10% | Paid | Ultra-fast AI inference on the LPU and LPX platform | category: ai-api; keywords 66%; semantic match | [.md](https://openaitools.app/tool/groq.md) |
| 8 | [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 69%; semantic match | [.md](https://openaitools.app/tool/ofoxai.md) |
| 9 | [Digitap.ai](https://openaitools.app/tool/credit-report-analytics-api) | 141,204 | -14.9% | Contact for Pricing | AI APIs for credit underwriting and digital customer onboarding | category: ai-customer-service, ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/credit-report-analytics-api.md) |
| 10 | [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 69%; semantic match | [.md](https://openaitools.app/tool/cometapi.md) |
| 11 | [Pipedream](https://openaitools.app/tool/pipedream) | 312,216 | -14.3% | Freemium, Paid, Contact for Pricing | Managed auth and 10,000+ tools for the agents you're building | category: ai-api; keywords 69%; semantic match | [.md](https://openaitools.app/tool/pipedream.md) |
| 12 | [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 69% | [.md](https://openaitools.app/tool/deepseek.md) |
| 13 | [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; keywords 69%; semantic match | [.md](https://openaitools.app/tool/ai-ml-api.md) |
| 14 | [Albato](https://openaitools.app/tool/albato-3-0) | 136,682 | -7.5% | Freemium, Free Trial, Paid, Contact for Pricing | No-code automation and embedded iPaaS with AI agents across 1,000+ apps | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/albato-3-0.md) |
| 15 | [ModelsLab](https://openaitools.app/tool/modelslab) | 74,376 | -26.2% | Freemium, Paid | One API for 10,000+ image, video, audio, 3D, and LLM models | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/modelslab.md) |
| 16 | [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; keywords 69%; semantic match | [.md](https://openaitools.app/tool/evolink-ai-model-api.md) |
| 17 | [Flaq AI](https://openaitools.app/tool/flaq-ai-api-platform) | 328,715 | +127.9% | Paid | One API key for the world's leading image, video and language models | category: ai-api; keywords 69%; semantic match | [.md](https://openaitools.app/tool/flaq-ai-api-platform.md) |
| 18 | [AiHubMix](https://openaitools.app/tool/aihubmix) | 238,455 | -16.1% | Contact for Pricing | One API key for hundreds of AI models | category: ai-api; keywords 69%; semantic match | [.md](https://openaitools.app/tool/aihubmix.md) |
| 19 | [Stable Diffusion API](https://openaitools.app/tool/stablediffusion-api) | 26,802 | -21.8% | Paid | One REST endpoint for SD 1.5, SDXL, Flux and 10,000+ community models | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/stablediffusion-api.md) |
| 20 | [Orshot](https://openaitools.app/tool/orshot) | 123,979 | +87% | Freemium | Design once, render forever — images, PDFs, and video from your API | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/orshot.md) |
| 21 | [MuAPI](https://openaitools.app/tool/muapi) | 412,788 | +13.7% | Freemium | One API for every generative image, video and audio model | category: ai-api; keywords 69%; semantic match | [.md](https://openaitools.app/tool/muapi.md) |
| 22 | [fastn: Composable Integration Middleware for SaaS](https://openaitools.app/tool/fastn-ai-composable-middleware) | 5,143 | -1.6% | Contact for Pricing | Embed a full integrations catalog inside your product - one widget, ones schema, agents that keep it running | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/fastn-ai-composable-middleware.md) |
| 23 | [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) |
| 24 | [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 69%; semantic match | [.md](https://openaitools.app/tool/apimaster.md) |

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

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