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SAMPLE CODE FOR
EVERY AI TOOL Free AI API examples in C#, Python, Java & JavaScript

One page per service: the call that matters in C#, Python, Java and JavaScript, ending with a link to the official docs, which always win.

50 Services
6 Categories
4 Languages
₹0 To read it all
Language

Text to speech, transcription and real-time voice — the APIs, and the engines you can host yourself.

RECIPE ElevenLabs The reference for natural text to speech, voice cloning and dubbing. C# Py Java JS RECIPE OpenAI Audio Transcription with gpt-transcribe, text to speech, and the realtime speech-to-speech API. C# Py Java JS RECIPE Deepgram Fast, accurate transcription with real-time streaming and diarisation. C# Py Java JS RECIPE AssemblyAI Transcription with summarisation, topics and speaker detection on top. C# Py Java JS RECIPE Azure AI Speech Microsoft's speech stack: TTS, STT, translation and custom voices. C# Py Java JS RECIPE Google Cloud Speech Google's text-to-speech and speech-to-text, with many Indian languages. C# Py Java JS RECIPE Piper Fast neural text to speech that runs entirely on CPU, offline and free. C# Py Java JS RECIPE whisper.cpp Whisper transcription in portable C++, no Python and no GPU required. C# Py Java JS

Generation, editing and reading text out of pictures.

RECIPE OpenAI Images Image generation and editing, including masked inpainting. C# Py Java JS RECIPE Stability AI Stable Diffusion image generation, upscaling and background removal. C# Py Java JS RECIPE Black Forest Labs FLUX FLUX image models — currently the strongest open-weight image family. C# Py Java JS RECIPE Replicate Thousands of community models behind one API, billed per second. C# Py Java JS RECIPE Runway Text-to-video and image-to-video generation. C# Py Java JS RECIPE Tesseract OCR Open-source OCR — no API key, no network, no per-page cost. C# Py Java JS

Vector databases and the embedding APIs that feed them — the retrieval half of RAG.

RECIPE OpenAI Embeddings The default embedding models most RAG pipelines start on. C# Py Java JS RECIPE Pinecone Managed vector database — no cluster to operate. C# Py Java JS RECIPE Qdrant Open-source vector database in Rust; runs as one container. C# Py Java JS RECIPE Weaviate Open-source vector database with built-in vectorisation modules. C# Py Java JS RECIPE Chroma The simplest way to start: an embedded vector store, no server. C# Py Java JS RECIPE pgvector Vector search inside PostgreSQL — no second database to run or back up. C# Py Java JS RECIPE Milvus Vector database built for billion-scale collections. C# Py Java JS

Orchestration layers that sit above the raw APIs, including the ones built for C# and Java.

RECIPE Microsoft.Extensions.AI The .NET abstraction over every chat provider — DI, middleware and telemetry included. C# Py Java JS RECIPE Semantic Kernel Microsoft's agent framework for C#, Python and Java. C# Py Java JS RECIPE Spring AI AI for Spring Boot, with the conventions Java teams already have. C# Py Java JS RECIPE LangChain4j The mature LLM toolkit for plain Java, no Spring required. C# Py Java JS RECIPE LangChain The most widely used orchestration library, and LangGraph for stateful agents. C# Py Java JS RECIPE LlamaIndex Built specifically around ingestion, indexing and retrieval. C# Py Java JS RECIPE Vercel AI SDK The standard for streaming AI into a JavaScript or TypeScript UI. C# Py Java JS RECIPE Pydantic AI Typed agents where the output is validated against a model, not hoped for. C# Py Java JS RECIPE CrewAI Multi-agent orchestration expressed as roles and tasks. C# Py Java JS RECIPE Model Context Protocol The open standard for giving any model access to your tools and data. C# Py Java JS

Run models yourself, or route to many providers through one endpoint.

RECIPE Ollama Run open models locally with one command and an OpenAI-compatible endpoint. C# Py Java JS RECIPE llama.cpp The inference engine underneath most local tooling. Runs on almost anything. C# Py Java JS RECIPE vLLM High-throughput self-hosted serving for when one GPU must serve many users. C# Py Java JS RECIPE Hugging Face The model registry, plus Inference Endpoints and Transformers. C# Py Java JS RECIPE OpenRouter One OpenAI-compatible endpoint in front of hundreds of models. C# Py Java JS RECIPE Together AI Hosted open models with fine-tuning and dedicated endpoints. C# Py Java JS RECIPE LiteLLM A proxy that normalises a hundred providers to one API, with budgets and keys. C# Py Java JS

WHAT THIS IS

The snippet you were going to search for anyway. Authentication, the first working call, streaming, error handling, and the one detail per service that costs an afternoon if you do not know it.

Runnable as written. No framework you have to adopt first, and no wrapper library of ours between you and the vendor's SDK.

WHAT THIS IS NOT

Not a ranking, not a benchmark, and not a replacement for the official documentation — every page links to it, and the vendor's docs are always the authority on their own API.

Pricing and model names move faster than any page can. Where something is likely to be stale, the page says so rather than pretending.

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