The Developer Toolkit Built for the AI Era
Essential tools for AI developers — count tokens, compare model pricing, build MCP manifests, craft prompts, and more. All free, all in your browser.
All Tools
AI Token Counter
Count tokens for GPT-4o, Claude, Llama, Gemini, and more. See costs instantly.
AI Model Pricing Calculator
Compare costs across 30+ AI models. Estimate your monthly spend instantly.
Free LLM VRAM Calculator — GPU Memory Check
Calculate GPU VRAM requirements for running local LLMs. Check if your GPU can run any model.
MCP Manifest Generator — Visual Editor
Build MCP server manifests visually. Add tools, resources, and prompts with a form-based editor.
MCP Config Validator
Validate MCP server configurations against the specification. Catch errors before deployment.
OpenAPI to MCP Converter
Convert any OpenAPI specification into MCP tool definitions automatically.
AI Coding Rules Generator
Generate config files for Cursor, Claude Code, Windsurf, and GitHub Copilot from a single form.
Cursor Rules Generator
Generate .cursorrules files for the Cursor AI IDE. Pick your stack, set coding conventions.
AGENTS.md Generator
Generate AGENTS.md files to guide AI coding agents. Supports Claude Code, Copilot, Cursor, Devin, and more.
A2A Agent Card Generator
Generate A2A Agent Card JSON for Google's Agent-to-Agent protocol. Define skills, capabilities, and security schemes.
Harness AI Pipeline Generator
Build Harness CI/CD pipelines with AI Agent integration visually. Generate AIDA-enabled YAML configs.
JSON Schema Builder
Build JSON schemas visually for LLM structured outputs, function calling, and API validation.
Prompt Diff & Version Compare
Compare two prompt versions side-by-side. See exactly what changed with token counts.
Prompt Template Library
Curated collection of system prompt templates for coding, writing, analysis, and more.
System Prompt Generator
Build effective system prompts step by step. Define role, task, format, and constraints visually.
Popular Guides
View all guidesFeatured AI Tools
View All AI ToolsLangChain
132kFramework for developing applications powered by LLMs. Provides chains, agents, retrieval, and memory modules.
LlamaIndex
48kData framework for building LLM applications over custom data. Specializes in RAG pipelines and data connectors.
AutoGen
56kMicrosoft's framework for building multi-agent conversational systems. Agents collaborate, debate, and solve tasks together.
Model Context Protocol
7.7kThe official MCP specification and SDKs by Anthropic. Open standard for connecting AI models to external tools and data.
Aider
43kAI pair programming in your terminal. Works with any LLM to edit code in your local git repo with automatic commits.
Hugging Face Transformers
159kThe most popular library for working with pre-trained models. Download, fine-tune, and deploy thousands of models.
Latest AI News
View All NewsAI Agent for Interior Design: Automate Space Planning, Material Selection & Project Management
AI Agent for Insurance: Automate Claims Processing, Underwriting & Fraud Detection (2026)
AI Agent for HR: Automate Recruiting, Onboarding & Employee Experience (2026)
From the Blog
View all postsMCP vs A2A: The Two Protocols Shaping the AI Agent Ecosystem (2026)
A comprehensive comparison of Anthropic's Model Context Protocol (MCP) and Google's Agent-to-Agent Protocol (A2A). Learn when to use each, how they complement each other, and their impact on AI development.
AI Video API Pricing 2026: Seedance vs Sora vs Kling vs Veo
Compare AI video generation API costs — Seedance 2.0, Sora 2, Kling 3.0, Veo 3.1, Runway Gen-3. Per-second pricing, free tiers, resolution, and developer integration guide. Updated Feb 2026.
Gemini 3.1 Pro Pricing: $2.00/$12 per M — 1M Context, Video
Google Gemini 3.1 Pro costs $2.00 input / $12.00 output per 1M tokens. 77.1% ARC-AGI-2 score, native video understanding, 1M context window, free tier available. Pricing vs GPT-5, Claude Opus 4.6.