Free Public API Directory for AI Agents and Developers | saxi.ai

saxi.ai free public APIs for AI agents and developers

Adanos Software

Market sentiment API for stocks and crypto.

Real-time sentiment and attention data from Reddit, X, financial news, Polymarket and crypto communities, unified into a developer-first API for trading tools, quant workflows and AI agents.

Market Data REST API JSON AI Agents CLI

Visit Adanos API Docs

{
  "ticker": "NVDA",
  "buzz_score": 79.4,
  "trend": "rising",
  "mentions": 3689,
  "sentiment_score": 0.64,
  "bullish_pct": 58,
  "bearish_pct": 14
}

Section

Featured APIs

The most useful free APIs for building with AI, sorted by documentation quality, protocol support, and real-world utility.

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Agent Hustle documentation page

AI & ML Browser AutomationLLMScrapingSearch

Agent Hustle

agent.stakewatch.dev

AI web services: scraping, research, screenshots, translation, summarization

API KeyHTTPSCORS YesOfficial

HelloSalut documentation page

AI & ML GeocodingTranslation

HelloSalut

fourtonfish.com

Get hello translation following user language

No AuthHTTPSCORS UnknownOfficial

City Bikes documentation page

Search & Retrieval Search

City Bikes

Project that provides bike sharing data for apps, research and projects to use.

No AuthHTTPSCORS UnknownOfficial

EXUDE-API documentation page

EXUDE-API

Used for the primary ways for filtering the stopping, stemming words from the text data

No AuthHTTPSCORS YesOfficial

FunTranslations documentation page

AI & ML Translation

FunTranslations

funtranslations.com

Translate Text into funny languages

No AuthHTTPSCORS YesOfficial

languagelayer documentation page

AI & ML Translation

languagelayer

languagelayer.com

Language detection

No AuthHTTPSCORS UnknownOfficial

LibreTranslate documentation page

AI & ML Translation

LibreTranslate

libretranslate.com

Translation tool with 17 available languages

No AuthHTTPSCORS UnknownOfficial

Movebank documentation page

Search & Retrieval Memory & StorageSearch

Movebank

Movebank is a free, online database and research platform for animal tracking and other on-animal sensor data

No AuthHTTPSCORS YesOfficial

Quran-api documentation page

AI & ML Translation

Quran-api

Free Quran API Service with 90+ different languages and 400+ translations

No AuthHTTPSCORS YesOfficial

Section

Collections

Hand-picked groups of APIs for common tasks — from browser automation and RAG pipelines to translation and speech.

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Free APIs for AI Agents

Free APIs for building AI agents — search, browser automation, speech, translation, messaging, memory, and LLM inference.

Developer Tool APIs

Free APIs for CI/CD, testing, monitoring, code analysis, and infrastructure.

Search and RAG APIs

Free search, retrieval, crawling, and discovery APIs for RAG pipelines and research workflows.

Browser Automation APIs

Free APIs for taking screenshots, rendering pages, and automating browsers.

Translation APIs

Free translation APIs for adding multilingual support to any application.

Section

Top Capabilities

Find APIs by what they do — search, code execution, OCR, geocoding, and more.

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Geocoding

Geocoding, routing, and maps APIs for location-aware products and agents.

Memory & Storage

Storage, file, and database APIs that agents can use as memory or state backends.

Search

Search and discovery APIs for content lookup, indexing, and retrieval pipelines.

Observability

Logging, tracing, monitoring, and metrics APIs.

Email

Email APIs for transactional workflows, notifications, and agent actions.

Browser Automation

APIs for screenshots, browser control, web automation, and page rendering.

LLM

Language model APIs for generation, reasoning, and agent orchestration.

Scheduling

Calendar and scheduling APIs for assistants and operational tooling.

Scraping

Scraping and crawling APIs for acquiring structured web data.