Building a ai chatbot
The APIs you would realistically stitch together, grouped by role: core data first, then enrichment, images and location.
| API | Pricing | Auth | Format | Free tier | Status |
|---|---|---|---|---|---|
Advice SlipRandom and searchable short advice slips from a fixed database, no key required. Media & Entertainment › Jokes & Quotes | Free | None | JSON | Unlimited | Live |
Agent NexusSearchable registry of APIs, MCP servers, and CLIs that AI agents can call, with live health data. Developer Tools › API Directories | Freemium | API key | JSON | 100–1k/day | 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 |
Alpha (Mossland)RAG Q&A and canonical entity data over Korean crypto news and on-chain activity. Finance & Commerce › Crypto | Free | None | JSON | <100/day | 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 |
Atomic MailSelf-registers a real email inbox for an AI agent (PoW, no signup) and sends/receives mail via JMAP. Communication › Email | Free | API key | JSON | Unlimited | Live |
Brave Search APILive web search index API returning ranked results, images, news, and AI-grounded answers. Developer Tools › Search & SERP | Freemium | API key | JSON | <100/day | Untested |
chucknorris.ioHand-curated Chuck Norris jokes: random, by category, or free-text search, no key needed. Media & Entertainment › Jokes & Quotes | Free | None | JSON | Unlimited | 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 |
CohereChat, embeddings and rerank models for building search, RAG and conversational AI features. AI & Machine Learning › LLMs | Freemium | API key | JSON | <100/day | Live |
CompareFairlyAI-built comparisons of products, services and facts with per-criterion sourced values and rankings. Finance & Commerce › Product Data | Free | None | JSON | — | Live |
Corporate Buzz WordsRandomly generates a nonsensical corporate-jargon phrase via one GET endpoint. Media & Entertainment › Jokes & Quotes | Free | None | JSON | Unlimited | 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 |
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 |
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 |
Evil Insult GeneratorRandom comedic insults from a curated database, returned as JSON, XML or plain text. Media & Entertainment › Jokes & Quotes | None | JSON | Unlimited | Live | |
FavQsQuote of the Day plus a searchable, user-curated quotes and authors database, with favoriting/voting. Media & Entertainment › Jokes & Quotes | Freemium | API key | JSON | 10k+/day | 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 |
GIPHY APISearch and retrieve GIFs and stickers by keyword, trending feed, or category. Media & Entertainment › Images & Photos | Freemium | API key | JSON | 1k–10k/day | Live |
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 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 |
HOL Registry BrokerSearch and resolve AI agents, MCP servers, and protocols indexed across multiple public registries. Developer Tools › API Directories | Freemium | API key | JSON | — | Live |
Hugging Face Inference ProvidersOne token routes chat, image, embedding and speech models to providers like Groq, fal and Together AI AI & Machine Learning › LLMs | Freemium | API key | JSON | — | Live |
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 |
icanhazdadjokeServes a large library of dad jokes as random, by ID, as a Slack message, an image, or via search. Media & Entertainment › Jokes & Quotes | Free | None | JSON | Unlimited | Live |
ImgflipPopular meme templates and a captioning endpoint to generate custom memes and GIFs. Media & Entertainment › Images & Photos | Freemium | Other | 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 |
Jina AIConverts any URL into clean LLM-ready Markdown; also offers web search, embeddings and reranking. AI & Machine Learning › Embeddings | Freemium | API key | JSON | — | Live |
JokeAPICurated joke database with categories, language and NSFW filters, served as JSON, XML or YAML. Media & Entertainment › Jokes & Quotes | Free | None | JSON | 10k+/day | Live |
JokeAPIServes programming, misc and dark jokes with filters for category, type, and content flags. Media & Entertainment › Jokes & Quotes | Free | None | JSON | 10k+/day | Live |
kanye.restA single endpoint returning one random Kanye West quote as JSON. Media & Entertainment › Jokes & Quotes | Free | None | JSON | Unlimited | Live |
Keanu Reeves Whoa APIVideo, audio and metadata for every documented 'whoa' Keanu Reeves says on film, filterable by movie or year. Media & Entertainment › Movies & TV | Free | None | JSON | Unlimited | 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 |
NewsAgent DataScores news articles by urgency and political lean, with event clustering and live push. Social & Content › News | Freemium | API key | JSON | 100–1k/day | Live |
NewsAPISearch and top-headline feeds pulling current and historical articles from 150k+ news sources. Social & Content › News | Freemium | API key | JSON | <100/day | Live |
NewsData.ioReal-time and historical news headlines, crypto and market news with AI tags and sentiment Social & Content › News | Freemium | API key | JSON | 100–1k/day | Live |
NewsMeshStructured trending, latest and searchable news articles from thousands of sources, for apps and AI agents. Social & Content › News | Freemium | API key | JSON | <100/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 |
PotterDBHarry Potter universe database: characters, books, movies, spells and potions, JSON:API format. Media & Entertainment › Movies & TV | Free | None | JSON | 10k+/day | Live |
Pusher ChannelsManaged realtime pub/sub messaging with presence channels for live dashboards, chat, and activity feeds. Communication › Chat | Freemium | Other | JSON | 10k+/day | Untested |
Random Useless FactsRandom or daily trivia facts in English or German, sourced with attribution links. Media & Entertainment › Jokes & Quotes | Free | None | JSON | Unlimited | Live |
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 |
SpoonacularRecipe search by ingredient, diet or nutrients, plus nutrition facts, grocery products and meal planning. Food & Drink › Recipes | Freemium | API key | JSON | — | Live |
Stack Exchange APIQuestions, answers, users and tags from Stack Overflow and other Stack Exchange sites. Social & Content › Q&A | Free | API key | JSON | 10k+/day | 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 |
SugraUnified API across markets, macroeconomics, entity screening, climate, and news, 1,600+ endpoints. Finance & Commerce › Stock Market | Freemium | API key | JSON | <100/day | Live |
TensorFeedFree JSON feeds of AI news, model pricing, provider status, research papers and GPU pricing. Social & Content › News | Freemium | None | JSON | 10k+/day | Live |
TheCocktailDBCocktail and mocktail recipes with measures, glassware, ingredient details and photos, filterable by spirit. Food & Drink › Beverages | Freemium | API key | JSON | Unlimited | Live |
TheMealDBCrowd-sourced meal recipes with ingredients, measures, steps and photos, searchable by ingredient or cuisine. Food & Drink › Recipes | Freemium | API key | JSON | Unlimited | Live |
They Said So QuotesOver a million famous quotes with authors, categories, daily quote-of-the-day, and shareable quote images. Media & Entertainment › Jokes & Quotes | Freemium | API key | JSON | — | Live |
ThunderbitTurns any URL into clean Markdown or AI-extracted JSON fields, with batch jobs and webhooks. Developer Tools › Web Scraping | Freemium | API key | JSON | — | Live |
TisaneFlags hate speech, cyberbullying and other abusive text across 35 languages AI & Machine Learning › Moderation | Freemium | API key | JSON | — | Live |
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 |
VedikaAI-native astrology API: Vedic/Western/KP birth charts, synastry, numerology, voice guidance. Culture & Society › Astrology | Paid | API key | JSON | — | Live |
Verified Supplement DataRanks supplements by cost per clinically effective dose, citing PubMed evidence for each pick. Health & Science › Nutrition | Free | None | JSON | Unlimited | Live |
VidWordsExtracts YouTube video transcripts with timestamps and offers AI analysis of on-screen content. Media & Entertainment › Video | Freemium | API key | JSON | <100/day | Live |
VotePredictorUS election win-probability forecasts, congressional records and pollster accuracy ratings. Data & Knowledge › Open Government Data | Free | None | JSON | Unlimited | Live |
Voyage EmbeddingsText, code and multimodal embedding models plus rerankers for search and RAG, up to 32k-token inputs. AI & Machine Learning › Embeddings | Free trial | API key | JSON | — | Live |
Webz.io News APISearches millions of daily news articles worldwide with sentiment, entities and topic tags. Social & Content › News | Freemium | API key | JSON | — | Live |
WikipediaFull-text article content, search, metadata and page history from Wikipedia and other wikis. Data & Knowledge › Encyclopedic | Free | None | JSON | Unlimited | Live |
WolframAlphaComputational answer engine returning direct answers, data, and visualizations for math and factual queries. Data & Knowledge › Encyclopedic | Freemium | API key | <100/day | Live | |
WorklittleSearchable job listings index with geocoded locations, salary data, and AI apply/resume tools. Business & Productivity › Jobs | Freemium | API key | JSON | <100/day | Live |
Advice SlipFreeLive
Random and searchable short advice slips from a fixed database, no key required.
None · JSON
Unlimited
no machine-readable spec
Agent NexusFreemiumLive
Searchable registry of APIs, MCP servers, and CLIs that AI agents can call, with live health data.
API key · JSON
100–1k/day
OpenAPI spec · MCP server · llms.txt
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
Alpha (Mossland)FreeLive
RAG Q&A and canonical entity data over Korean crypto news and on-chain activity.
None · JSON
<100/day
MCP server · 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
Atomic MailFreeLive
Self-registers a real email inbox for an AI agent (PoW, no signup) and sends/receives mail via JMAP.
API key · JSON
Unlimited
llms.txt
Brave Search APIFreemiumUntested
Live web search index API returning ranked results, images, news, and AI-grounded answers.
API key · JSON
<100/day
no machine-readable spec
chucknorris.ioFreeLive
Hand-curated Chuck Norris jokes: random, by category, or free-text search, no key needed.
None · JSON
Unlimited
no machine-readable 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
CohereFreemiumLive
Chat, embeddings and rerank models for building search, RAG and conversational AI features.
API key · JSON
<100/day
no machine-readable spec
CompareFairlyFreeLive
AI-built comparisons of products, services and facts with per-criterion sourced values and rankings.
None · JSON
—
llms.txt
Corporate Buzz WordsFreeLive
Randomly generates a nonsensical corporate-jargon phrase via one GET endpoint.
None · JSON
Unlimited
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
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
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
Evil Insult GeneratorLive
Random comedic insults from a curated database, returned as JSON, XML or plain text.
None · JSON
Unlimited
no machine-readable spec
FavQsFreemiumLive
Quote of the Day plus a searchable, user-curated quotes and authors database, with favoriting/voting.
API key · JSON
10k+/day
no machine-readable spec
FunTranslationsFreemiumUntested
Novelty text translators (Yoda, Pirate, Morse code and 100+ more) via a paid REST API.
API key · JSON
—
OpenAPI spec
GIPHY APIFreemiumLive
Search and retrieve GIFs and stickers by keyword, trending feed, or category.
API key · JSON
1k–10k/day
OpenAPI spec · llms.txt
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 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
HOL Registry BrokerFreemiumLive
Search and resolve AI agents, MCP servers, and protocols indexed across multiple public registries.
API key · JSON
—
OpenAPI spec · llms.txt
Hugging Face Inference ProvidersFreemiumLive
One token routes chat, image, embedding and speech models to providers like Groq, fal and Together AI
API key · JSON
—
MCP server
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
icanhazdadjokeFreeLive
Serves a large library of dad jokes as random, by ID, as a Slack message, an image, or via search.
None · JSON
Unlimited
no machine-readable spec
ImgflipFreemiumLive
Popular meme templates and a captioning endpoint to generate custom memes and GIFs.
Other · JSON
—
no machine-readable spec
ISMS CopilotPaidLive
OpenAI-compatible chat API preloaded with ISO 27001, SOC 2, HIPAA and NIST compliance content.
API key · JSON
—
llms.txt
Jina AIFreemiumLive
Converts any URL into clean LLM-ready Markdown; also offers web search, embeddings and reranking.
API key · JSON
—
no machine-readable spec
JokeAPIFreeLive
Curated joke database with categories, language and NSFW filters, served as JSON, XML or YAML.
None · JSON
10k+/day
no machine-readable spec
JokeAPIFreeLive
Serves programming, misc and dark jokes with filters for category, type, and content flags.
None · JSON
10k+/day
no machine-readable spec
kanye.restFreeLive
A single endpoint returning one random Kanye West quote as JSON.
None · JSON
Unlimited
no machine-readable spec
Keanu Reeves Whoa APIFreeLive
Video, audio and metadata for every documented 'whoa' Keanu Reeves says on film, filterable by movie or year.
None · JSON
Unlimited
MCP server
MusicGPTFreemiumUntested
AI audio API for text-to-music generation, remixing, text-to-speech and voice conversion.
API key · JSON
—
no machine-readable spec
NewsAgent DataFreemiumLive
Scores news articles by urgency and political lean, with event clustering and live push.
API key · JSON
100–1k/day
llms.txt
NewsAPIFreemiumLive
Search and top-headline feeds pulling current and historical articles from 150k+ news sources.
API key · JSON
<100/day
no machine-readable spec
NewsData.ioFreemiumLive
Real-time and historical news headlines, crypto and market news with AI tags and sentiment
API key · JSON
100–1k/day
no machine-readable spec
NewsMeshFreemiumLive
Structured trending, latest and searchable news articles from thousands of sources, for apps and AI agents.
API key · JSON
<100/day
llms.txt
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
PotterDBFreeLive
Harry Potter universe database: characters, books, movies, spells and potions, JSON:API format.
None · JSON
10k+/day
no machine-readable spec
Pusher ChannelsFreemiumUntested
Managed realtime pub/sub messaging with presence channels for live dashboards, chat, and activity feeds.
Other · JSON
10k+/day
no machine-readable spec
Random Useless FactsFreeLive
Random or daily trivia facts in English or German, sourced with attribution links.
None · JSON
Unlimited
no machine-readable spec
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
SpoonacularFreemiumLive
Recipe search by ingredient, diet or nutrients, plus nutrition facts, grocery products and meal planning.
API key · JSON
—
OpenAPI spec
Stack Exchange APIFreeLive
Questions, answers, users and tags from Stack Overflow and other Stack Exchange sites.
API key · JSON
10k+/day
OpenAPI 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
SugraFreemiumLive
Unified API across markets, macroeconomics, entity screening, climate, and news, 1,600+ endpoints.
API key · JSON
<100/day
OpenAPI spec · MCP server · llms.txt
TensorFeedFreemiumLive
Free JSON feeds of AI news, model pricing, provider status, research papers and GPU pricing.
None · JSON
10k+/day
MCP server · llms.txt
TheCocktailDBFreemiumLive
Cocktail and mocktail recipes with measures, glassware, ingredient details and photos, filterable by spirit.
API key · JSON
Unlimited
OpenAPI spec
TheMealDBFreemiumLive
Crowd-sourced meal recipes with ingredients, measures, steps and photos, searchable by ingredient or cuisine.
API key · JSON
Unlimited
OpenAPI spec
They Said So QuotesFreemiumLive
Over a million famous quotes with authors, categories, daily quote-of-the-day, and shareable quote images.
API key · JSON
—
llms.txt
ThunderbitFreemiumLive
Turns any URL into clean Markdown or AI-extracted JSON fields, with batch jobs and webhooks.
API key · JSON
—
llms.txt
TisaneFreemiumLive
Flags hate speech, cyberbullying and other abusive text across 35 languages
API key · JSON
—
OpenAPI 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
VedikaPaidLive
AI-native astrology API: Vedic/Western/KP birth charts, synastry, numerology, voice guidance.
API key · JSON
—
OpenAPI spec · llms.txt
Verified Supplement DataFreeLive
Ranks supplements by cost per clinically effective dose, citing PubMed evidence for each pick.
None · JSON
Unlimited
OpenAPI spec · MCP server · llms.txt
VidWordsFreemiumLive
Extracts YouTube video transcripts with timestamps and offers AI analysis of on-screen content.
API key · JSON
<100/day
OpenAPI spec · MCP server · llms.txt
VotePredictorFreeLive
US election win-probability forecasts, congressional records and pollster accuracy ratings.
None · JSON
Unlimited
MCP server · llms.txt
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
Webz.io News APIFreemiumLive
Searches millions of daily news articles worldwide with sentiment, entities and topic tags.
API key · JSON
—
no machine-readable spec
WikipediaFreeLive
Full-text article content, search, metadata and page history from Wikipedia and other wikis.
None · JSON
Unlimited
no machine-readable spec
WolframAlphaFreemiumLive
Computational answer engine returning direct answers, data, and visualizations for math and factual queries.
API key ·
<100/day
OpenAPI spec
WorklittleFreemiumLive
Searchable job listings index with geocoded locations, salary data, and AI apply/resume tools.
API key · JSON
<100/day
OpenAPI spec · llms.txt
Nothing matches that combination. Clear the filters and start from the category.