AI & Machine Learning APIs
AI and machine learning APIs here span LLMs, speech, image generation, OCR, translation, moderation, text analysis and image recognition. Most are commercial and billed by usage, with free tiers or trials common: Google Gemini and Mistral offer free access, while OpenRouter and Hugging Face route one key to many models. Specialists include ElevenLabs for speech, DeepL for translation and Google Cloud Vision for images. Free AI APIs →
| API | Pricing | Auth | Format | Free tier | Status |
|---|---|---|---|---|---|
AI For ThaiThai-language NLP, vision, and speech AI services from Thailand's national tech research center. AI & Machine Learning › LLMs | API key | JSON | — | Live | |
AI/ML APISingle API and key that proxies 1,000+ third-party LLM, image and speech models, OpenAI-SDK compatible. AI & Machine Learning › LLMs | Paid | API key | JSON | — | Live |
Anthropic MessagesClaude models for chat, tool calling, image and PDF input and structured output, with streamed replies. AI & Machine Learning › LLMs | Paid | API key | JSON | — | Live |
AssemblyAISpeech-to-text for files and live audio in 99 languages, with speaker labels, subtitles and an LLM gateway. AI & Machine Learning › Speech | Free trial | API key | JSON | — | Live |
AudexumText-to-speech in 43 voices and 32 languages, plus speech-to-text transcription in 100+ languages. AI & Machine Learning › Speech | Freemium | API key | JSON | — | Live |
CartesiaLow-latency text-to-speech over HTTP, SSE or WebSocket, plus speech-to-text and instant voice cloning. AI & Machine Learning › Speech | Freemium | API key | Binary | — | Live |
Cerebras InferenceChat completions on open-weight models such as GPT-OSS 120B, served on Cerebras wafer-scale chips. AI & Machine Learning › LLMs | Free trial | API key | JSON | — | Live |
CloudmersiveDetects faces, objects, NSFW content, and generates image captions and OCR text from photos. AI & Machine Learning › Image Generation | Freemium | API key | JSON | <100/day | Live |
Cloudmersive Natural Language ProcessingSentiment, entity extraction, POS tagging, language detection and translation via one text API. AI & Machine Learning › Text Analysis | Freemium | API key | JSON | <100/day | Untested |
Code DetectionDetects and labels code snippets inside text, classifies the language, and returns formatted output. AI & Machine Learning › Text Analysis | Free trial | API key | JSON | — | Untested |
CohereChat, embeddings and rerank models for building search, RAG and conversational AI features. AI & Machine Learning › LLMs | Freemium | API key | JSON | <100/day | Live |
CustomGPT.aiBuild a custom RAG chatbot trained on your own documents or site, queried over REST. AI & Machine Learning › LLMs | Free trial | API key | JSON | — | Live |
DeepAIGenerates, edits, upscales, and colorizes images from text prompts via simple POST endpoints. AI & Machine Learning › Image Generation | Paid | API key | JSON | — | Live |
DeepgramSpeech-to-text and text-to-speech transcription with streaming and pre-recorded audio, plus voice agents. AI & Machine Learning › Speech | Free trial | API key | JSON | — | Live |
DeepLNeural translation of text and whole Word, PDF and PowerPoint files, with glossaries and style rules. AI & Machine Learning › Translation | Freemium | API key | JSON | — | Live |
DeepSeekDeepSeek V4 Flash and Pro models with 1M-token context, OpenAI- and Anthropic-compatible, half price off-peak AI & Machine Learning › LLMs | Paid | API key | JSON | — | Live |
Detect LanguageIdentifies the language of a text snippet from 216 supported languages, with a confidence score. AI & Machine Learning › Text Analysis | Freemium | API key | JSON | 1k–10k/day | Live |
DialogflowGoogle's NLU platform for building chatbots and voice agents: intents, entities, multi-turn dialogue. AI & Machine Learning › Text Analysis | Freemium | OAuth | JSON | 10k+/day | Untested |
Eden AISingle API that routes OCR, speech, vision and text requests to 500+ AI provider models. AI & Machine Learning › LLMs | Paid | API key | JSON | — | Untested |
ElevenLabsText-to-speech in 70+ languages with 10,000+ voices, plus speech-to-text, voice cloning and dubbing. AI & Machine Learning › Speech | Freemium | API key | JSON | — | Live |
FinSignalsClassifies Reddit and news posts about stocks into sentiment, bullish/bearish stance, and quality signals. AI & Machine Learning › Text Analysis | Freemium | API key | JSON | <100/day | Live |
Fireworks AIServerless open-weight LLM, vision and embedding models with OpenAI- and Anthropic-compatible endpoints. AI & Machine Learning › LLMs | Free trial | API key | JSON | — | Live |
Fish AudioText-to-speech with emotion tags, instant voice cloning from short clips, and transcription, billed per byte. AI & Machine Learning › Speech | Freemium | API key | Binary | — | Live |
FunTranslationsNovelty text translators (Yoda, Pirate, Morse code and 100+ more) via a paid REST API. AI & Machine Learning › Translation | Freemium | API key | JSON | — | Untested |
GladiaAsync and real-time speech-to-text API with translation, summarization, and sentiment add-ons. AI & Machine Learning › Speech | Free trial | API key | JSON | — | Live |
Google Cloud Natural Language APISentiment, entity, syntax and content-classification analysis for text via Google Cloud. AI & Machine Learning › Text Analysis | Freemium | OAuth | JSON | 100–1k/day | Live |
Google Cloud Translation APITranslate text and documents between 100+ languages with neural or LLM models, plus language detection. AI & Machine Learning › Translation | Freemium | API key | JSON | — | Live |
Google Cloud Vision APILabel images, locate objects, recognise landmarks and logos, detect faces and read text in photos. AI & Machine Learning › Image Recognition | Freemium | OAuth | JSON | <100/day | Untested |
Google GeminiGoogle's multimodal generative AI: text, image and code generation via Gemini models. AI & Machine Learning › LLMs | Freemium | API key | JSON | — | Live |
GroqOpenAI-compatible chat, speech-to-text and text-to-speech on open-weight models such as GPT-OSS and Whisper AI & Machine Learning › LLMs | Freemium | API key | JSON | — | Live |
HarnessRouterRuns managed coding-agent harnesses (Codex, Claude Code, Hermes) behind one API, billed per work-minute. AI & Machine Learning › LLMs | Freemium | API key | JSON | — | Untested |
Hugging Face Inference ProvidersOne key, one API routing chat, image, speech and embedding calls to 200+ models across providers. AI & Machine Learning › LLMs | Freemium | API key | JSON | — | Live |
IBM Watson Text to SpeechConverts text into natural-sounding speech in many languages and voices via IBM Watson. AI & Machine Learning › Speech | Freemium | API key | Binary | — | Untested |
ImaggaTags, categorizes, crops and moderates photos, plus face and text recognition, via REST calls. AI & Machine Learning › Image Recognition | Freemium | API key | JSON | <100/day | Untested |
insect.idIdentifies insects, spiders and other invertebrates from photos, with danger, taxonomy and multilingual names AI & Machine Learning › Image Recognition | Free trial | API key | JSON | — | Live |
ISMS CopilotOpenAI-compatible chat API preloaded with ISO 27001, SOC 2, HIPAA and NIST compliance content. AI & Machine Learning › LLMs | Paid | API key | JSON | — | Live |
LangblyTranslates text and documents with auto language detection; matches Google Translate v2's request format. AI & Machine Learning › Translation | Freemium | API key | JSON | — | Live |
languagelayerDetects which of 173 languages a piece of text is written in, with a confidence score. AI & Machine Learning › Text Analysis | Freemium | API key | JSON | <100/day | Live |
LanguageToolChecks grammar, spelling and style in 30+ languages; free public endpoint, paid API for scale. AI & Machine Learning › Text Analysis | Freemium | None | JSON | 10k+/day | Untested |
LibreTranslateOpen-source machine translation between 50+ languages, self-hostable or via a paid hosted API. AI & Machine Learning › Translation | Paid | API key | JSON | — | Live |
LlamaParseConverts PDFs, scans, Office files and spreadsheets to markdown or JSON, with tables and layout, for RAG. AI & Machine Learning › OCR | Freemium | API key | JSON | — | Live |
LogMealRecognises dishes in meal photos and returns ingredients, nutrition facts and intake tracking per user AI & Machine Learning › Image Recognition | Free trial | API key | JSON | — | Live |
Magic HourGenerates and edits AI video, image, and audio content through credit-billed REST endpoints. AI & Machine Learning › Image Generation | Freemium | API key | JSON | — | Live |
MindeePulls structured fields from invoices, receipts, IDs and custom documents; also raw OCR, split and crop. AI & Machine Learning › OCR | Free trial | API key | JSON | — | Live |
MindsGenerates AI-simulated survey/interview responses from described audiences for market research. AI & Machine Learning › LLMs | Freemium | API key | JSON | — | Live |
Mistral AIMistral's chat, coding, OCR and Voxtral speech models, plus embeddings, with a no-card free mode for testing AI & Machine Learning › LLMs | Freemium | API key | JSON | — | Live |
mushroom.idIdentifies fungi, lichens and slime molds from photos, returning edibility, look-alikes and species details AI & Machine Learning › Image Recognition | Free trial | API key | JSON | — | Live |
MusicGPTAI audio API for text-to-music generation, remixing, text-to-speech and voice conversion. AI & Machine Learning › Speech | Freemium | API key | JSON | — | Untested |
NLP CloudText-AI API for summarization, NER, sentiment, translation, generation, and other NLP tasks. AI & Machine Learning › Text Analysis | — | Untested | |||
OCR.spaceExtracts text and optional word positions from images and PDFs in 27 languages; can output searchable PDFs. AI & Machine Learning › OCR | Freemium | API key | JSON | 100–1k/day | Live |
OpenAI ResponsesOpenAI's model endpoint for text and image input, tool calling and multi-turn state, billed per token. AI & Machine Learning › LLMs | Paid | API key | JSON | — | Live |
OpenRouterOne OpenAI-compatible endpoint for 500+ models from many labs, with provider fallback and free models AI & Machine Learning › LLMs | Freemium | API key | JSON | <100/day | Live |
PerspectiveGoogle Jigsaw's ML classifier scoring toxicity, insults and threats in text; shutting down Dec 2026. AI & Machine Learning › Moderation | Free | API key | JSON | — | Deprecated |
Picsart APIAI image/video editing API: background removal, upscaling, style transfer, and text-to-image generation. AI & Machine Learning › Image Generation | Freemium | API key | JSON | — | Live |
Pl@ntNetIdentifies plant species from 1–5 photos with confidence scores, plus disease and variety ID; 50+ languages. AI & Machine Learning › Image Recognition | Freemium | API key | JSON | 100–1k/day | Live |
plant.idIdentifies plants and diagnoses diseases or pests from photos, with names, taxonomy, toxicity and care info. AI & Machine Learning › Image Recognition | Free trial | API key | JSON | — | Live |
PollinationsOne OpenAI-compatible gateway for image, text, video, audio and embedding models, billed in prepaid Pollen. AI & Machine Learning › Image Generation | Freemium | API key | JSON | — | Live |
PurgoMalumDetects and censors profanity/obscenity in text, including leetspeak substitutions, keyless. AI & Machine Learning › Moderation | Free | None | JSON | Unlimited | Live |
ReplicateRuns thousands of hosted models (Flux images, video, LLMs, speech), billed per second of GPU or per output. AI & Machine Learning › Image Generation | Free trial | API key | JSON | — | Live |
Rev AIAsync and streaming transcription with captions, translation, summaries, sentiment and topic extraction. AI & Machine Learning › Speech | Free trial | API key | JSON | — | Live |
Roboflow UniverseLibrary of 1M+ open computer vision datasets and 250k+ trained models, runnable via a hosted inference API. AI & Machine Learning › Image Recognition | Freemium | API key | JSON | — | Untested |
Sentino Personality APIScores text or survey responses into personality profiles (Big Five, NEO, MBTI, DISC, HEXACO) via NLP. AI & Machine Learning › Text Analysis | Paid | API key | JSON | — | Live |
SightengineDetect nudity, violence, weapons, hate symbols, AI-generated images and offensive text in user uploads. AI & Machine Learning › Moderation | Freemium | API key | JSON | <100/day | Live |
SpeechmaticsBatch and real-time transcription in 55+ languages with diarization, plus low-latency English TTS. AI & Machine Learning › Speech | Free trial | API key | JSON | — | Live |
statlyteCurrent prices, context windows, and API IDs for 168 LLM models across 13 providers. AI & Machine Learning › LLMs | Freemium | None | JSON | 1k–10k/day | Live |
TisaneFlags hate speech, cyberbullying and other abusive text across 35 languages AI & Machine Learning › Moderation | Freemium | API key | JSON | — | Live |
Together AIPay-per-token hosting for open-weight chat, image and embedding models behind an OpenAI-compatible interface. AI & Machine Learning › LLMs | Paid | API key | JSON | — | Live |
ToHumanRewrites AI-generated text into natural, human-sounding prose using a self-hosted fine-tuned model. AI & Machine Learning › Text Analysis | Freemium | API key | JSON | — | Untested |
TranscriptFetchExtracts timestamped transcripts from YouTube, TikTok and Instagram videos, channels and playlists. AI & Machine Learning › Speech | Freemium | API key | JSON | <100/day | Live |
UnoRouterOpenAI-compatible gateway routing one API key across 200+ AI models from many providers. AI & Machine Learning › LLMs | Freemium | API key | JSON | — | Live |
UnstructuredParses PDFs, Office files, emails and images into markdown or elements, and extracts fields to a JSON schema. AI & Machine Learning › OCR | Free trial | API key | JSON | — | Live |
UpResAI-based upscaling of images, video, and speech to 4K/8K via 14 specialized models. AI & Machine Learning › Image Generation | Paid | API key | JSON | — | Live |
Veryfi OCR APITurn photos and PDFs of receipts, invoices, checks, W-2s and bank statements into structured line-item JSON. AI & Machine Learning › OCR | Freemium | API key | JSON | <100/day | Live |
Voyage EmbeddingsText, code and multimodal embedding models plus rerankers for search and RAG, up to 32k-token inputs. AI & Machine Learning › LLMs | Free trial | API key | JSON | — | Live |
WaveSpeedAIRuns 900+ AI models for image, video, and audio generation through one async REST API. AI & Machine Learning › Image Generation | Free trial | API key | JSON | — | Live |
AI For ThaiLive
Thai-language NLP, vision, and speech AI services from Thailand's national tech research center.
API key · JSON
—
MCP server
AI/ML APIPaidLive
Single API and key that proxies 1,000+ third-party LLM, image and speech models, OpenAI-SDK compatible.
API key · JSON
—
llms.txt
Anthropic MessagesPaidLive
Claude models for chat, tool calling, image and PDF input and structured output, with streamed replies.
API key · JSON
—
no machine-readable spec
AssemblyAIFree trialLive
Speech-to-text for files and live audio in 99 languages, with speaker labels, subtitles and an LLM gateway.
API key · JSON
—
no machine-readable spec
AudexumFreemiumLive
Text-to-speech in 43 voices and 32 languages, plus speech-to-text transcription in 100+ languages.
API key · JSON
—
llms.txt
CartesiaFreemiumLive
Low-latency text-to-speech over HTTP, SSE or WebSocket, plus speech-to-text and instant voice cloning.
API key · Binary
—
no machine-readable spec
Cerebras InferenceFree trialLive
Chat completions on open-weight models such as GPT-OSS 120B, served on Cerebras wafer-scale chips.
API key · JSON
—
no machine-readable spec
CloudmersiveFreemiumLive
Detects faces, objects, NSFW content, and generates image captions and OCR text from photos.
API key · JSON
<100/day
OpenAPI spec
Cloudmersive Natural Language ProcessingFreemiumUntested
Sentiment, entity extraction, POS tagging, language detection and translation via one text API.
API key · JSON
<100/day
OpenAPI spec
Code DetectionFree trialUntested
Detects and labels code snippets inside text, classifies the language, and returns formatted output.
API key · JSON
—
no machine-readable spec
CohereFreemiumLive
Chat, embeddings and rerank models for building search, RAG and conversational AI features.
API key · JSON
<100/day
no machine-readable spec
CustomGPT.aiFree trialLive
Build a custom RAG chatbot trained on your own documents or site, queried over REST.
API key · JSON
—
llms.txt
DeepAIPaidLive
Generates, edits, upscales, and colorizes images from text prompts via simple POST endpoints.
API key · JSON
—
llms.txt
DeepgramFree trialLive
Speech-to-text and text-to-speech transcription with streaming and pre-recorded audio, plus voice agents.
API key · JSON
—
no machine-readable spec
DeepLFreemiumLive
Neural translation of text and whole Word, PDF and PowerPoint files, with glossaries and style rules.
API key · JSON
—
OpenAPI spec
DeepSeekPaidLive
DeepSeek V4 Flash and Pro models with 1M-token context, OpenAI- and Anthropic-compatible, half price off-peak
API key · JSON
—
no machine-readable spec
Detect LanguageFreemiumLive
Identifies the language of a text snippet from 216 supported languages, with a confidence score.
API key · JSON
1k–10k/day
no machine-readable spec
DialogflowFreemiumUntested
Google's NLU platform for building chatbots and voice agents: intents, entities, multi-turn dialogue.
OAuth · JSON
10k+/day
OpenAPI spec
Eden AIPaidUntested
Single API that routes OCR, speech, vision and text requests to 500+ AI provider models.
API key · JSON
—
no machine-readable spec
ElevenLabsFreemiumLive
Text-to-speech in 70+ languages with 10,000+ voices, plus speech-to-text, voice cloning and dubbing.
API key · JSON
—
no machine-readable spec
FinSignalsFreemiumLive
Classifies Reddit and news posts about stocks into sentiment, bullish/bearish stance, and quality signals.
API key · JSON
<100/day
no machine-readable spec
Fireworks AIFree trialLive
Serverless open-weight LLM, vision and embedding models with OpenAI- and Anthropic-compatible endpoints.
API key · JSON
—
no machine-readable spec
Fish AudioFreemiumLive
Text-to-speech with emotion tags, instant voice cloning from short clips, and transcription, billed per byte.
API key · Binary
—
OpenAPI spec
FunTranslationsFreemiumUntested
Novelty text translators (Yoda, Pirate, Morse code and 100+ more) via a paid REST API.
API key · JSON
—
OpenAPI spec
GladiaFree trialLive
Async and real-time speech-to-text API with translation, summarization, and sentiment add-ons.
API key · JSON
—
llms.txt
Google Cloud Natural Language APIFreemiumLive
Sentiment, entity, syntax and content-classification analysis for text via Google Cloud.
OAuth · JSON
100–1k/day
OpenAPI spec
Google Cloud Translation APIFreemiumLive
Translate text and documents between 100+ languages with neural or LLM models, plus language detection.
API key · JSON
—
no machine-readable spec
Google Cloud Vision APIFreemiumUntested
Label images, locate objects, recognise landmarks and logos, detect faces and read text in photos.
OAuth · JSON
<100/day
no machine-readable spec
Google GeminiFreemiumLive
Google's multimodal generative AI: text, image and code generation via Gemini models.
API key · JSON
—
no machine-readable spec
GroqFreemiumLive
OpenAI-compatible chat, speech-to-text and text-to-speech on open-weight models such as GPT-OSS and Whisper
API key · JSON
—
llms.txt
HarnessRouterFreemiumUntested
Runs managed coding-agent harnesses (Codex, Claude Code, Hermes) behind one API, billed per work-minute.
API key · JSON
—
no machine-readable spec
Hugging Face Inference ProvidersFreemiumLive
One key, one API routing chat, image, speech and embedding calls to 200+ models across providers.
API key · JSON
—
MCP server
IBM Watson Text to SpeechFreemiumUntested
Converts text into natural-sounding speech in many languages and voices via IBM Watson.
API key · Binary
—
no machine-readable spec
ImaggaFreemiumUntested
Tags, categorizes, crops and moderates photos, plus face and text recognition, via REST calls.
API key · JSON
<100/day
no machine-readable spec
insect.idFree trialLive
Identifies insects, spiders and other invertebrates from photos, with danger, taxonomy and multilingual names
API key · JSON
—
OpenAPI spec
ISMS CopilotPaidLive
OpenAI-compatible chat API preloaded with ISO 27001, SOC 2, HIPAA and NIST compliance content.
API key · JSON
—
llms.txt
LangblyFreemiumLive
Translates text and documents with auto language detection; matches Google Translate v2's request format.
API key · JSON
—
MCP server · llms.txt
languagelayerFreemiumLive
Detects which of 173 languages a piece of text is written in, with a confidence score.
API key · JSON
<100/day
llms.txt
LanguageToolFreemiumUntested
Checks grammar, spelling and style in 30+ languages; free public endpoint, paid API for scale.
None · JSON
10k+/day
OpenAPI spec
LibreTranslatePaidLive
Open-source machine translation between 50+ languages, self-hostable or via a paid hosted API.
API key · JSON
—
OpenAPI spec
LlamaParseFreemiumLive
Converts PDFs, scans, Office files and spreadsheets to markdown or JSON, with tables and layout, for RAG.
API key · JSON
—
no machine-readable spec
LogMealFree trialLive
Recognises dishes in meal photos and returns ingredients, nutrition facts and intake tracking per user
API key · JSON
—
no machine-readable spec
Magic HourFreemiumLive
Generates and edits AI video, image, and audio content through credit-billed REST endpoints.
API key · JSON
—
OpenAPI spec · llms.txt
MindeeFree trialLive
Pulls structured fields from invoices, receipts, IDs and custom documents; also raw OCR, split and crop.
API key · JSON
—
OpenAPI spec
MindsFreemiumLive
Generates AI-simulated survey/interview responses from described audiences for market research.
API key · JSON
—
OpenAPI spec · MCP server · llms.txt
Mistral AIFreemiumLive
Mistral's chat, coding, OCR and Voxtral speech models, plus embeddings, with a no-card free mode for testing
API key · JSON
—
OpenAPI spec
mushroom.idFree trialLive
Identifies fungi, lichens and slime molds from photos, returning edibility, look-alikes and species details
API key · JSON
—
OpenAPI spec
MusicGPTFreemiumUntested
AI audio API for text-to-music generation, remixing, text-to-speech and voice conversion.
API key · JSON
—
no machine-readable spec
NLP CloudUntested
Text-AI API for summarization, NER, sentiment, translation, generation, and other NLP tasks.
·
—
OpenAPI spec
OCR.spaceFreemiumLive
Extracts text and optional word positions from images and PDFs in 27 languages; can output searchable PDFs.
API key · JSON
100–1k/day
no machine-readable spec
OpenAI ResponsesPaidLive
OpenAI's model endpoint for text and image input, tool calling and multi-turn state, billed per token.
API key · JSON
—
OpenAPI spec
OpenRouterFreemiumLive
One OpenAI-compatible endpoint for 500+ models from many labs, with provider fallback and free models
API key · JSON
<100/day
OpenAPI spec
PerspectiveFreeDeprecated
Google Jigsaw's ML classifier scoring toxicity, insults and threats in text; shutting down Dec 2026.
API key · JSON
—
no machine-readable spec
Picsart APIFreemiumLive
AI image/video editing API: background removal, upscaling, style transfer, and text-to-image generation.
API key · JSON
—
no machine-readable spec
Pl@ntNetFreemiumLive
Identifies plant species from 1–5 photos with confidence scores, plus disease and variety ID; 50+ languages.
API key · JSON
100–1k/day
OpenAPI spec
plant.idFree trialLive
Identifies plants and diagnoses diseases or pests from photos, with names, taxonomy, toxicity and care info.
API key · JSON
—
OpenAPI spec
PollinationsFreemiumLive
One OpenAI-compatible gateway for image, text, video, audio and embedding models, billed in prepaid Pollen.
API key · JSON
—
no machine-readable spec
PurgoMalumFreeLive
Detects and censors profanity/obscenity in text, including leetspeak substitutions, keyless.
None · JSON
Unlimited
no machine-readable spec
ReplicateFree trialLive
Runs thousands of hosted models (Flux images, video, LLMs, speech), billed per second of GPU or per output.
API key · JSON
—
OpenAPI spec
Rev AIFree trialLive
Async and streaming transcription with captions, translation, summaries, sentiment and topic extraction.
API key · JSON
—
OpenAPI spec
Roboflow UniverseFreemiumUntested
Library of 1M+ open computer vision datasets and 250k+ trained models, runnable via a hosted inference API.
API key · JSON
—
MCP server · llms.txt
Sentino Personality APIPaidLive
Scores text or survey responses into personality profiles (Big Five, NEO, MBTI, DISC, HEXACO) via NLP.
API key · JSON
—
no machine-readable spec
SightengineFreemiumLive
Detect nudity, violence, weapons, hate symbols, AI-generated images and offensive text in user uploads.
API key · JSON
<100/day
no machine-readable spec
SpeechmaticsFree trialLive
Batch and real-time transcription in 55+ languages with diarization, plus low-latency English TTS.
API key · JSON
—
no machine-readable spec
statlyteFreemiumLive
Current prices, context windows, and API IDs for 168 LLM models across 13 providers.
None · JSON
1k–10k/day
OpenAPI spec · llms.txt
TisaneFreemiumLive
Flags hate speech, cyberbullying and other abusive text across 35 languages
API key · JSON
—
OpenAPI spec
Together AIPaidLive
Pay-per-token hosting for open-weight chat, image and embedding models behind an OpenAI-compatible interface.
API key · JSON
—
no machine-readable spec
ToHumanFreemiumUntested
Rewrites AI-generated text into natural, human-sounding prose using a self-hosted fine-tuned model.
API key · JSON
—
no machine-readable spec
TranscriptFetchFreemiumLive
Extracts timestamped transcripts from YouTube, TikTok and Instagram videos, channels and playlists.
API key · JSON
<100/day
MCP server · llms.txt
UnoRouterFreemiumLive
OpenAI-compatible gateway routing one API key across 200+ AI models from many providers.
API key · JSON
—
MCP server · llms.txt
UnstructuredFree trialLive
Parses PDFs, Office files, emails and images into markdown or elements, and extracts fields to a JSON schema.
API key · JSON
—
OpenAPI spec
UpResPaidLive
AI-based upscaling of images, video, and speech to 4K/8K via 14 specialized models.
API key · JSON
—
llms.txt
Veryfi OCR APIFreemiumLive
Turn photos and PDFs of receipts, invoices, checks, W-2s and bank statements into structured line-item JSON.
API key · JSON
<100/day
no machine-readable spec
Voyage EmbeddingsFree trialLive
Text, code and multimodal embedding models plus rerankers for search and RAG, up to 32k-token inputs.
API key · JSON
—
no machine-readable spec
WaveSpeedAIFree trialLive
Runs 900+ AI models for image, video, and audio generation through one async REST API.
API key · JSON
—
MCP server · llms.txt
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Choosing an AI & Machine Learning API
Is there a free AI & Machine Learning API?
Yes. PurgoMalum is free to use, and Google Gemini, ElevenLabs, Audexum, Cartesia, Cloudmersive and 37 others have a free tier alongside paid plans. See all free AI APIs.
Which AI & Machine Learning APIs work without an API key?
LanguageTool, PurgoMalum and statlyte need no key or sign-up, so you can try them with a plain request.
Can I call an AI & Machine Learning API from front-end JavaScript?
PurgoMalum and statlyte allow cross-origin requests and need no key, so they work straight from the browser. For the others, call them from your server so your key stays private.
Can I use AI & Machine Learning APIs in a commercial project?
Google Gemini, AI/ML API, Anthropic Messages, AssemblyAI, Cerebras Inference and 38 others permit commercial use. ElevenLabs, Audexum, Cartesia, Cohere, Fish Audio and 7 others restrict it, for example to non-commercial or attributed use, so read the terms first.
Which AI & Machine Learning APIs work with AI agents?
Minds has both an MCP server and an OpenAPI spec. AI For Thai, Hugging Face Inference Providers, Langbly, Roboflow Universe, TranscriptFetch and 2 others have an MCP server, so an AI agent can call them directly. OpenAI Responses, Cloudmersive, Cloudmersive Natural Language Processing, DeepL, Dialogflow and 19 others publish an OpenAPI spec for generating clients and tools.
Browse by subcategory: LLMs APIs · Image Generation APIs · Speech APIs · OCR APIs · Moderation APIs · Translation APIs · Text Analysis APIs · Image Recognition APIs
Popular topics: Open-Source LLM APIs · AI Video Generation APIs · Background Removal APIs · Text to Speech APIs · Speech to Text APIs · Voice Cloning APIs · Document Parsing APIs · Sentiment Analysis APIs