GitHub
github.com › galaxyapi › claude-3
GitHub - galaxyapi/claude-3: Free Proxy to access Claude-3 API. Anthropic key not required 🔐. It uses OpenAI format api to easily integrate on any Openai supported frontend.
Free Proxy to access Claude-3 API. Anthropic key not required 🔐. It uses OpenAI format api to easily integrate on any Openai supported frontend. - galaxyapi/claude-3
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Puter
developer.puter.com › tutorials › free-unlimited-claude-35-sonnet-api
Free, Unlimited Claude API
1 month ago - Getting StartedExample 1: Basic Text Generation with Claude Sonnet 4.5Example 2: Streaming Responses for Longer QueriesExample 3: Using different Claude modelsAvailable ModelsRelated · This tutorial will show you how to use Puter.js to access Claude's advanced AI capabilities (such as Claude Sonnet 4.5, Claude Opus 4.5, Claude Haiku 4.5) for free, without any API keys, backend, or servers.
Videos
06:19
How To Use Claude Code AI COMPLETELY FOR FREE - YouTube
03:33
How To Use Claude 3 Opus AI For Free NOW! - YouTube
02:24
How to get your own Claude API key (2024)
How to Generate API Key for Anthropic (Claude 3) - Quick ...
00:56
How to Generate the Anthropic Claude API Key - YouTube
Reddit
reddit.com › r/claudeai › use claude 3 opus from the api to prevent paying a flat $20/month for it
r/ClaudeAI on Reddit: Use Claude 3 Opus from the API to prevent paying a flat $20/month for it
March 27, 2024 -
I highly recommend using Claude 3 Opus from the API, especially if you just want to try it out. It’s not free but the API doesn’t require an upfront flat fee and doesn’t have rate limits etc!
There’s some options for desktop like TypingMind.
For iOS I wanted to suggest my app called Pal Chat that lets you use your own API Key to chat with Claude, and it’s completely free to download: https://apps.apple.com/us/app/pal-ai-chat-client/id6447545085
(The app also has no backend and takes absolutely no usage data. You can verify this by going to the app privacy report in iOS settings!)
Top answer 1 of 5
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Okay... but Opus is $75 per million tokens. For someone that uses it as a chatbot (not night and day by any means), how does that stack up to $20/month (roughly)?
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Connecting via the API is often cheaper as you are paying per-use. If you don't use $20 worth of service, then there's no need to be paying $20 per month. For desktop users, LibreChat is good and open source. Can connect to numerous APIs. Installation is slightly technical but clearly described. https://github.com/danny-avila/LibreChat
DataCamp
datacamp.com › tutorial › getting-started-with-claude-3-and-the-claude-3-api
Getting Started with Claude 3 and the Claude 3 API | DataCamp
March 13, 2024 - To access Claude 3 Opus for free, you have to sign up for Anthropic API: console.anthropic.com.
GitHub
github.com › SreejanPersonal › Claude-3-Opus-Free-Reverse-Engineered-API
GitHub - SreejanPersonal/Claude-3-Opus-Free-Reverse-Engineered-API: Unofficial, open-source Claude 3 Opus API implementation. Free and accessible way to interact with the AI model programmatically, enabling innovative applications and integrations.
Unofficial, open-source Claude 3 Opus API implementation. Free and accessible way to interact with the AI model programmatically, enabling innovative applications and integrations. - SreejanPersona...
Starred by 35 users
Forked by 8 users
Languages Python 62.5% | Jupyter Notebook 37.5%
Claude
claude.com › platform › api
Claude Developer Platform | Claude
Allow Claude to interact with hundreds of external tools and APIs so it can perform a wider range of tasks.
Cursor IDE
cursor-ide.com › blog › free-claude-37-api-guide-2025-english
Complete Guide to Free Claude 3.7 API: Three Zero-Cost Methods (2025) - Cursor IDE 博客
April 4, 2025 - EXCLUSIVE: Access Claude 3.7, the top-tier AI model, without spending a dime! This comprehensive guide details three free methods with step-by-step registration instructions, complete code examples, and real-world performance comparisons!
GeeksforGeeks
geeksforgeeks.org › gblog › getting-started-with-claude-3-and-the-claude-3-api
Getting Started with Claude 3 and the Claude 3 API - GeeksforGeeks
July 23, 2025 - If you want to access Claude 3 Opus, you can sign in to Anthropic API and then click on the Workbench tap where you can select the Claude 3 Opus model. This is a very responsive chat interface that can be easily accessed by signing in the ...
Beebom
beebom.com › how-access-claude-3-api-opus-sonnet-models-examples
How to Access Claude 3 API for Opus and Sonnet Models (With Examples) | Beebom
October 15, 2025 - Anthropic is offering $5 worth of free API access to users and developers. You can start using the API for Opus and Sonnet models. However, API access for the smallest Haiku model is not available yet.
AIMLAPI
aimlapi.com › build-with-claude-3-opus-api
Build with Claude 3 Opus API
Gain instant access to Claude 3 Opus through production API: AI/ML API provides direct connectivity to Llama 3 API. Try Playground Claude 3 Opus API for free
Laozhang
blog.laozhang.ai › ai-tools › free-claude-37-api-guide
The Ultimate Guide to Free Claude 3.7 API Access in 2025: No Credit Card Required – LaoZhang-AI
Puter.js offers perhaps the cleanest solution for accessing Claude 3.7 Sonnet capabilities without any API keys or usage restrictions. This service operates on a “User Pays” model – when your users interact with your application, they cover the compute costs directly. How Puter.js Works: Rather than requiring developers to manage API keys and billing, Puter.js shifts the computation cost to the end user through micropayments handled in the background. This creates a truly free developer experience with no usage limits.
Segmind
segmind.com › models › claude-3.5-sonnet
Claude 3.5 Sonnet Serverless API
Claude 3.5 Sonnet is a large language model (LLM) launched by Anthropic AI. It is considered state-of-the-art, outperforming previous versions of Claude and competing models in a variety of tasks
Apidog
apidog.com › blog › claude-3-api
Guide: What is Claude 3 API and How to Use it?
July 28, 2025 - With an even more powerful AI model ... advanced API model, Claude 3 Opus, surpasses all AI models that exist, all Claude 3 services are not free to use....
GitHub
github.com › KoushikNavuluri › Claude-API
GitHub - KoushikNavuluri/Claude-API: This project provides an unofficial API for Claude AI, allowing users to access and interact with Claude AI .
This project provides an unofficial API for Claude AI, allowing users to access and interact with Claude AI . ... 1. Python Console ChatBot ( Check in usecases folder for sample console chatbot ) 2. Discord Chatbot 3.
Starred by 862 users
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Languages Python
PyPI
pypi.org › project › claude-api-py
claude-api-py
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Nightfall AI
nightfall.ai › ai-security-101 › anthropic-claude-api-key
Anthropic Claude API Key: The Essential Guide | Nightfall AI Security 101
Anthropic Claude API keys are free to obtain, but they are subject to a variety of restrictions.
Claude
claude.ai
Claude
Talk with Claude, an AI assistant from Anthropic
CometAPI
cometapi.com › how-to-get-claude-free-api
How to get Claude Free APIs? 3 Ways! - CometAPI - All AI Models in One API
July 8, 2025 - Among Claude’s model lineup—Haiku, Sonnet, and Opus—Sonnet 4 is uniquely available to free users. This hybrid model provides both rapid-response (“near-instant”) and extended reasoning (“think longer”) modes, enabling developers ...
Elephas
elephas.app › blog › how-to-get-claude-api-key-step-by-step-guide-or-2024-clxvepzbb00084gdk5z5kixqp
How to Get Claude API Key (Step by Step Guide) | 2025
February 9, 2025 - To get the Claude API key, you need to create a free account and generate API keys for your usage. The process to get the Claude API keys is easy. Follow the steps given below. 1. Log In: First login to your account then access your Anthropic ...