LLMs, models, AI tools, machine learning
enables developers to trace, evaluate, manage prompts and datasets, and debug issues related to an LLM application’s performance. It creates open telemetry standard traces for any LLM which helps with observability and works with any observability client. Free plan offers 50K traces/month.
An LLM evaluation and observability platform with agent simulation and prompt playground. Free tier offers 10k monthly logs, access to prompt playground, simulations and evaluations via BYOK.
Evals, prompt playground, and data management for Gen AI. Free plan gives upto 1,000 private eval rows/week.
Open-source platform to evaluate, observe, and improve LLM and AI agent apps, with tracing, evals, simulations, and guardrails. Free tier includes 50GB storage, 2K eval credits, 100K AI-gateway requests/month, 1M tokens of text agent simulation and 60 min of voice simulation, plus unlimited projects
Clinical AI Reference. Students have free access to the professional tool suite, which includes Open Search, Clinical Summary, Med Review, Drug Interactions, ICD-10 Codes, and Stewardship. Additionally, a free trial for the professional suite is available.
A LLMOps platform helping AI teams measure, monitor, and optimize LLM applications for reliability, cost-efficiency, and performance. With a powerful DSPy component, we enable seamless collaboration between engineers and non-technical teams to fine-tune and productionize GenAI products. Free plan in
Evaluate, test, and ship LLM applications across your dev and production lifecycles. [#opensource](https://github.com/comet-ml/opik/)
Open-source LLM engineering platform that helps teams collaboratively debug, analyze, and iterate on their LLM applications. Free forever plan includes 50k observations per month and all platform features. [#opensource](https://github.com/langfuse/langfuse)
easy-to-use, free image generation AI with free API available. No signups or API keys required, and several option for integrating into a website or workflow. [#opensource](https://github.com/pollinations/pollinations)
Converts audio or video to text using AI. Generates summaries and other insights using LLMs. The free tier includes 2 transcriptions per day. You can upload files, record voice notes, or use links from YouTube, Instagram etc. The free version also supports WhatsApp, Telegram and importing files dire
AI Powered Writing Assistant. The entire platform is free as long as you bring your own API key.
AI engineering platform that helps AI eng/PMs, evaluate, and observe AI applications and agents with built-in Alyx agent. Free product inlcudes 25k spans and ingestion volume of 1gb per month.
Open-source (MIT) LLM observability and evaluation platform to trace, monitor, and evaluate AI agents in production. Free Starter plan includes 20K credits/month, 30-day data retention, and unlimited seats. [#opensource](https://github.com/latitude-dev/latitude-llm)
Control panel for Gen AI apps featuring an observability suite & an AI gateway. Send & log up to 10,000 requests for free every month.
AI-powered audio enhancer SaaS that removes noise and echo while preserving natural vocal clarity. totally Free: unlimited one-click enhancements, no login required, supports MP3/WAV/FLAC
The best LLM monitoring platform. One format to call 200+ LLMs with 2 lines of code. 10,000 free requests every month and $0 for platform features!
AI media gateway providing unified access to leading image generation models via an OpenAI-compatible API. The platform itself is free to use with zero markup and no subscription fee. Inference costs for most models are billed at provider price, but FLUX.1 [schnell] FP8 is offered free forever with
Provides various free AI models including DeepSeek R1, V3, Llama, and Moonshot AI. These models excel in natural language processing and are suitable for diverse development needs. Note that while these models are free to use, they are subject to rate limits. Additionally, OpenRouter offers paid mod
Instantly auto-fix outputs from tools like Cursor, Windsurf, and Copilot to meet your company's quality and compliance standards using guardrails built with Policy as Code. The free tier includes 100 tools calls per day to the MCP server and 25 free automated pull request reviews per day via the Git
MediaWorkbench.ai offers 100,000 free words for Azure OpenAI, DeepSeek, and Google Gemini models, enabling users to access powerful tools for code generation, deep research, and image creation.
Instantly turn any Google Sheets into a RESTful API. Free plan available, including 1,000 free rows per sheet.
Free API Management platform to design, build, and deploy APIs to the Edge. Add API Key authentication, rate limiting, developer documentation and Monetization to any API in minutes. OpenAPI-native and fully-programmable with web standard apis & Typescript. The free plan offers up to 10 projects, un
Headless Chrome scraping API and free checked proxies service. Javascript rendering, premium rotating proxies, CAPTCHAs avoiding. Free 10,000 API credits.
Free Zip Code API, access to Worldwide Postal Code Data. 5,000 free requests/month.
Open Graph (OG) social preview image generation API. Generate dynamic 1200×630 images for Twitter, LinkedIn and Facebook via URL params, edge-cached on Cloudflare Workers. Free tier: 1,000 renders/month. Paid plans from $12/month.
Web scraping API with headless browsers, residentials IPs, and straightforward pricing. One thousand free API calls/month and extra credits for students and non-profits.
Treblle helps teams build, ship, and govern APIs. With advanced API log aggregation, observability, docs, and debugging. You get all features for free, but there is a limit of up to 250k requests per month on the free tier.
REST API for US and Canadian postal codes with address validation, radius search, and Census demographics. 2,500 free requests/day.
API infrastructure for building gamification features like achievements, streaks, points and leaderboards in web and mobile apps. Free for 100 monthly active users.
EU VAT number validation REST API with VIES and national tax-registry fallback, returning the official VIES consultation number for audit records. Free tier of 100 validations/month, no credit card.
Global weather data including current conditions, hourly and daily forecasts, and weather alerts via our API. Integrating AI models and ML systems to analyze and combine multiple weather models to deliver improved forecast accuracy. Free tier includes 10,000 API calls/month.
Geekflare API lets you scrape websites into Markdown, take screenshots, perform TLS scans and DNS lookups, test load times, and more. The free plan offers 500 API credits per month (e.g., 500 DNS lookups, 250 web scrapes, or 100 screenshots). See [credit mapping](https://docs.geekflare.com/api/api-c
Offers free plan of weather API. Provides accurate and up-to-date weather forecasting with global coverage, historical data and weather monitoring solutions.
Simple and free VAT number validation API. 150 free validations per month.
Create secure RESTful APIs from CSV files. Upload a CSV file and instantly access the data via its API allowing faster application development. The free plan includes 2 APIs and 2,500 API calls per month. You don't need a credit card.
AI-powered code review assistant. The free plan has a limit of 25,000 monthly tokens (~10 PRs).
Free IP Reputation & Threat Intelligence, powered by a globally distributed high interaction honeypot network and community reported abuse incidents. 1,000 free IP lookups, TAXII indicators & reports per day, pull 5,000 fresh IPs from our blacklists daily and monitor your own CIDR ranges (/16) free
A collection of free online SQL tools, including an SQL formatter and validator, SQL regex tester, fake data generator, and interactive database playgrounds.
Real-time exchange rates for 590+ currencies and crypto. Unlimited API calls on the free plan, perfect for developers and finance apps.
SmartParse is a data migration and CSV to API platform that offers time- and cost-saving developer tools. The Free tier includes 300 Processing Units per month, Browser uploads, Data quarantining, Circuit breakers, and Job Alerts.
Simple Web Scraping API with built-in parsing, Chrome rendering, and proxies. Two thousand free API calls per month.
Real-time search engine scraping API. Returns structured JSON results for Google, YouTube, Bing, Baidu, Walmart, and many other machines. The free plan includes 100 successful API calls per month.
API for online search and rapid insights and comprehensive research, with the capability of organization of research results. 1000 request/month for the Free tier with No credit card required.
A free service to check your public IPv4 and IPv6 address and related request data through an API with different output formats for automation, scripts, and network troubleshooting.
IP Geolocation API with 1000 free requests / day. Provides information about the location of an IP address, including country, city, region, and more.
PDF generation API with a visual template editor, dynamic data merging, and SDKs for 7 languages. Free plan includes 60 PDFs/month and 3 templates.
The developer-first MLOps platform. Build better models faster with experiment tracking, dataset versioning, and model management. Free tier for personal projects only, with 100 GB of storage included.
Trigger your webhook after each operation. The free plan includes 100 cloud scrape credits.
Free Zip Code API and Postal Code Validation. Ten thousand free requests/month.
Free daystream database service. All operations are performed by API. Visualization with heat maps and line graphs is also possible.
Free mock REST API service providing realistic data across 9 domains (e-commerce, finance, healthcare, education, recruitment, social media, stock markets, weather, and aviation). No mandatory signup, no API keys, unlimited requests. Perfect for frontend prototyping, API testing, learning and teachi
IP Address Location API by Kloudend, Inc - A reliable geolocation API built on AWS, trusted by Fortune 500. The free tier offers 30k lookups/month (1k/day) without signup.
Create a free endpoint to which you can send HTTP requests. Any HTTP requests sent to that endpoint will be recorded with the associated payload and headers so you can observe recommendations from webhooks and other services.
Simple service to get a public IP address in different [formats](https://about.ipaddress.sh/).
An OCR API parses image and pdf files that return the text results in JSON format. 25,000 requests per month are free and a 1MB file size limit.
20 free pages/month: Extract data from PDFs, emails. AI powered. Full API access.
PDF Automation API, visual template editor or HTML to PDF, dynamic data integration, and PDF rendering with an API. The free plan comes with one template, 100 PDFs/month.
Freemium, fast, and reliable IP geolocation API. Get data like city, coordinates, ISP, ASN, AS data and more. The free plan includes 50k credits per month. IP2Location.io also offers 500 free WHOIS and hosted domain lookups per month. See domain registration details and find domains hosted on a spec
Search news on the web with code, and get JSON results. Developers get 100 queries free each day. Articles have a 24 hour delay.
Developer-focused PDF generation API designed with privacy in mind. It offers Stripe-inspired documentation and includes 500 free PDF conversions per month.
Provides real-time and historical financial data for stocks, options, mutual funds, and more. The Free Forever API tier allows for 100 daily API requests at no charge.
Enterprise-grade Public holiday API service for over 200 countries. The free plan includes 500 calls per month.
Returns the Public IP address of the client it is requested from. No registration is required for the free tier. Using CORS, data can be requested using client-side JS directly from the browser. Useful for services monitoring change in client and server IPs. Unlimited Requests.
GraphQL API for Amazon.com product, search, and category data. The free plan includes 100 calls per month.
Schedule webhooks to fire at a future time with automatic retries, delivery tracking, and failure alerting. Free plan includes 1,000 webhooks per month.
A multi-country HS (Harmonized System) and HTS (Harmonized Tariff System) code lookup API, with a free plan offering 100 lookups/day.
Free web-based Python notebook environment with Nvidia Tesla K80 GPU.
The MLOps platform for experiment tracking, model production management, model registry, and complete data lineage, covering your workflow from training to production. Free for individuals and academics.
Composable commerce API that can build, place, and manage orders from any front end. The developer plan allows 100 orders per month and up to 1,000 SKUs for free.
A hosted Apache Superset service. Forever free for teams of up to 5 users, featuring unlimited dashboards and charts, a no-code chart builder, and a collaborative SQL editor.
PDF generator API with drag-and-drop template editor that provides an SDK and no-code integrations. The free plan has 250 monthly pages, unlimited users, and three templates.
Generate PDF documents with JSON to PDF API based on LaTeX templates. The free plan allows 50 API calls per month and access to a library of templates.
Integration platform for AI Agents and LLMs. Integrate over 200+ tools across the agentic internet.
A free API providing accurate data for building the Covid-19 related useful Apps.
Create a fake REST API from a JSON object, and customize HTTP status codes, headers, and response bodies.
IP Geolocation API, Free for non-commercial use, no API key required, limited to 45 req/minute from the same IP address for the free plan.
Mockfly is a trusted development tool for API mocking and feature flag management. Quickly generate and control mock APIs with an intuitive interface. The free tier offers 500 requests per day.
Cube helps data engineers and application developers access data from modern data stores, organize it into consistent definitions, and deliver it to every application. The fastest way to use Cube is with Cube Cloud, which has a free tier limited to 1,000 queries per day.
Proxy service for inspecting and debugging API calls. The free plan includes 10,000 requests per month.
Realtime currency data API for fintech apps. The free plan includes 5,000 calls per month.
Free IP geolocation API with 1k request per IP per day.lite database under the CC-BY 4.0 License is free too.
Build, train, and deploy NLP models for Pytorch, TensorFlow, and JAX. Free up to 30k input characters/mo.
2,000 free requests per day. Fast, enterprise grade API at non-enterprise prices. Trusted by developers, corporate, government and education clients. Servers in 12+ regions.
Simple HTTP proxy API for scraping. Scrape anonymously without having to worry about restrictions, blocks, or captchas. First 100 successful scrapes per month free including javascript rendering (more available if you contact support).
JSONSwiss is a powerful online JSON viewer, editor, and validator. Format, visualize, search, and manipulate JSON data with AI-powered repair, tree view, table view, code generation in 12+ programming languages, convert json to csv, xml, yaml, properties and more.
Hook0 is an open-source Webhooks-as-a-service (WaaS) that makes it easy for online products to provide webhooks. Dispatch up to 100 events/day with seven days of history retention for free.
Free IP → country/city/ASN JSON API, no key, CORS-open. MaxMind GeoLite2.
Comprehensive automotive data API with VIN decoding, stolen vehicle checks, vehicle valuation, inspection data, and more. Free tier includes 100 requests/month across all 9 endpoints.
Simulate, evaluate, and observe your AI agents. Maxim is an end-to-end evaluation and observability platform, helping teams ship their AI agents reliably and >5x faster. Free forever for indie developers and small teams (3 seats).
A new data science notebook. Jupyter is compatible with real-time collaboration and running in the cloud. The free tier includes unlimited personal projects, unlimited basic machines with 5GB RAM and 2vCPU, and teams with up to 3 editors.
SaaS API empowering the generation of screenshots or PDFs directly from HTML/CSS/JS code. The free plan allows 250 documents month.
HTML to PDF or PDF to PNG/Text & PDF merging/extraction/merging APIs. Free tier has 600 calls a month.
Turn any unstructured documents (PDF, XLSX, JPG, PPTX, etc.) into structured JSON data. Parse, extract data, and edit PDF forms. Free tier with 15k free credits and pay-as-you-go.
Simplify workflows and create better APIs - faster - with Postman, a collaboration platform for API development. Use the Postman App for free forever. Postman cloud features are also free forever with certain limits.
An online tool for comparing differences between two JSON data structures, helping you quickly locate the differences in JSON data.
Proxy your API, choose which endpoints to mock in the cloud and inspect traffic, for free. Speed up your development and integration tests.
IP Geolocation API with multi-continent servers, offering a free plan with 2,000 requests per day.
Bulk fill and mail merge PDF forms from CSV using the web app or Public API. The free plan includes 100 output PDFs/month.
Access over 70 (cloud)platforms such as Exact Online, Twinfield, ActiveCampaign or Visma using Invantive SQL or OData4 (typically Power BI or Power Query). Includes data replication and exchange. Free plan for developers and implementation consultants. Free for specific platforms with limitations in
Online File Converter for documents, images, video, audio, and eBooks. REST API is available. Libraries for Node.js, PHP, Python. Support files up to 50 GB (for paid plans). The free tier is limited by file size (20MB) and number of conversions (30/Day, 300/Month).
HTML to PDF document generation with templates, webhook delivery, and credit-based pricing. Free plan with 50 monthly credits, no credit card required.
API and Microservice to provides a wide range of information including countries, regions, provinces, cities, postal codes, and much more. The free tier includes up to 100 requests per day.
Free tool to Visualize, Edit, Filter complex JSON data into beautiful tabular Grid. Save and Share JSON data over link link.
IP geolocation API to convert IP addresses into location data including city, country, timezone, ASN, and currency. The free plan includes 1,000 requests per month.
IP API that detects residential proxies and VPNs. ProxySentry.io offers a free tier with 10k requests per month on rapidapi.com.
MockAPI is a simple tool that lets you quickly mock up APIs, generate custom data, and perform operations using a RESTful interface. MockAPI is meant to be a prototyping/testing/learning tool. One project/2 resources per project for free.
A video editing API to automate video marketing and social media videos, programmatically or with no code.
A reliable IP Address API from Developers for Developers with the best Hosting Detection capabilities that exist. The free plan offers 1000 lookups without signup.
A complete platform for dataflow automation. Free plan includes 5 deployed workflows and 500 minutes of serverless compute credits per month.
Aggregator of expired and dropping domain listings from 16 marketplaces, with SEO enrichment (backlinks, Trust Flow, Wayback history) and a quality score. Free plan: 10 unlocked listings, 5 favorites, 3 saved searches. 7-day Pro trial on signup includes full REST API and MCP server access.
A free and simple tool to check your exit IP address across multiple nodes and understand how your IP appears to different global regions and services. Useful for testing rule-based DNS splitting tools such as Control D.
Utility API platform with full access to expansive API Library including Document Conversion, Virus Scanning, and more with 600 calls/month, North America AZ only, 2.5MB maximum file size.
Stock market and financial data API. Free plan allows 300 requests per day.
Data integration tool that syncs between apps. It can create live dashboards and reports, transform and manipulate values, and collect and back up insights. The free plan is limited to one user, data connection, data source, and data destination. Also requires manual data refresh.
FFmpeg API - A REST API for FFmpeg, run FFmpeg online without handling the infrastructure. Free tier with monthly processing quota and 4 vCPUs available.
Free, Fast and Reliable IP Geolocation API for commercial and non-commercial users available in JSON
Cloud-based Database schema design and modeling tool with a free starter plan of 2 Database models and ten tables per model.
a collaborative data platform for notebooks, data apps, and knowledge libraries. Free community tier with up to five projects.
Tool for connecting, cleaning, and importing data into Salesforce. Free Plan includes up to 20,000 records per month.
A free, browser-based tool to format, validate,compare and minify JSON data instantly.
Managed API to generate and privately store PDFs and Screenshots using top rendering technology. The free plan allows 400 PDFs and Screenshots per month.
Python notebooks by Jetbrains. Includes 10 GB of storage and 120 hours of runtime each month.
IP Geolocation API from Abstract - Allows 1,000 free requests.
Auto-Generate PDF documents from reusable templates with a drop-and-drop editor and a simple API. The free plan comes with 100 PDFs/month and three templates.
KillBait API allows users to submit URLs for content evaluation, detecting potential clickbait and categorizing articles. The API is designed for moderate publishing frequency, with limits of 1 submission per hour and 10 per day. Media partners can request higher limits.
Open-source API client for designing and testing APIs, it supports REST and GraphQL
API that crawls websites and converts them into clean, LLM-ready markdown or structured data, handling JavaScript rendering, proxies, and rate limits. The free plan includes 1,000 credits per month with no credit card required.
A login security API to detect fraudulent and suspicious logins and notify your customers. Free for 1,000 logins per month.
Real-time SEC filings, insider trades, and institutional holdings API. Free tier includes 15 requests per minute.
Augmented reality face filters for any platform with one SDK. The free plan provides up to 10 monthly active users (MAU) and tracks up to 4 faces
Modern standard for API documentation. Beautiful and easy-to-maintain UI components, in-app search, and interactive playground. Free for 1 editor.
Free gRPC GUI client to call and test gRPC APIs. Can import gRPC APIs via server reflection.
A browser extension (Google Chrome, MS Edge) for data extraction from web pages CSV or Excel. The free plan gives you 500 pages/month.
Connect Airtable to any application or API with no code. Postman-like interface for running API requests in Airtable. Pre-built integrations with dozens of apps. The free plan includes 100 runs per month.
An embarrassingly simple API that provides your business with reliable and helpful IP geolocation data with 50,000 free lookups per month.
Convert JSON into an interactive table for quick viewing, editing, and sharing online.
IP Geolocation API, free up to 1,000 requests/day. Includes proxy/VPN/hosting detection, ASN data, IP to Company, and more. IPLocate also offers free downloadable IP to Country and IP to ASN databases in CSV or GeoIP-compatible MMDB formats.
Fast, accurate, and free (up to 50k/month) IP address data API. Offers APIs with details on geolocation, companies, carriers, IP ranges, domains, abuse contacts, and more. All paid APIs can be trialed for free.
Extracting and monitoring data on the web. 1k credits per month for free, equals 1k concurrent requests.
Machine learning observability for model monitoring and root-causing issues such as data quality and performance drift. Free up to two models.
Get instant access to over 120+ APIs for free, built with quality, consistency, and reliability in mind. The free plan covers up to 50 API Tokens per month. (Possibly taken down, 2025-06-25)
Auto-generate images and PDF documents with a simple API or automation tools like Zapier & Airtable. No CSS/HTML is required. The free plan comes with 50 images/month and three templates.
API suite for various use cases, including IP geolocation, phone number validation, or email validation.
Provides fast, accurate, and free (Unlimited or up to 10K-50K/month) APIs for modern web like IP Geolocation, Reverse Geocoding, Networking Insights, Email and Phone Validation, Client Info and more.
Financial news API and MCP server. Every article gets per-ticker impact analysis, a category, and a 1-10 relevance score, and SEC Form 4 insider filings are turned into scored events. The free tier includes 20 requests per minute and 100 requests per day on both REST and MCP, no card required.
Web scraping and automation platform to create an API for any website and extract data. Ready-made scrapers, integrated proxies, and custom solutions. Free plan with $5 platform credits included every month.
Independent web, news, image, video search and AI/LLM context API, suitable for RAG pipelines and AI agents. Free tier includes $5 in monthly credits (credit card required for verification).
No-code, cloud-based platform for mocking and debugging multi-protocol APIs (REST, SOAP, gRPC & GraphQL), providing instant servers with rules-based logic, CRUD & stateful mocking, proxying, and CORS management for faster integration and testing. The free plan includes 50 requests per day and provid
Headless browser API for automation, scraping, AI agent web access, image/pdf generation, and more. Free plan with 1k requests per month.
Hands-on review of StepFun's free Mini Plan: 27 models with OpenAI-compatible API for Claude Code, Codex CLI, Hermes Agent, and Cursor. Step 3.7 Flash multimodal flagship + Step Image Edit 2 hands-on (KRIS-Bench #1). Up to 90 days free. Promo ends July 18.
Hands-on comparison of LLM Gateway, Bifrost, LiteLLM, One API, and OpenRouter — covering deployment, latency, guardrails, pricing, and Claude Code integration to help you pick the right AI gateway.
Learn how to build a free AI translation system using SiliconFlow's free translation API and the Immersive Translate browser extension. Zero cost, full features.
Tencent's 295B-parameter Hy3 model launched July 6 with free API access on OpenRouter, Hermes, and SiliconFlow. Benchmarks, platform comparison, and hands-on evaluation.
📭
No resources found
Try adjusting your search or filters