# DevToken Studio

> Client-side AI engineering workbench for calculating live 2026 LLM token and API costs (synced from OpenRouter v1 API across 465+ models including GPT-6.1, Claude 5.5, Gemini 4 Argon, DeepSeek V4.1, Grok 4.7, and Qwen 3.8), generating Model Context Protocol (MCP) JSON configurations, building llms.txt manifests, and converting JSON to strict OpenAI Structured Outputs & TypeScript Zod schemas.

## Core Interactive Developer Tools

- [LLM Token & API Cost Calculator](https://devtoken.codeap.com/tools/llm-pricing-calculator): Real-time token estimation and 30-day API cost ledger with Prompt Caching and Batch API discounts across 465+ live models.
- [MCP Server Config Generator & Validator](https://devtoken.codeap.com/tools/mcp-config-generator): Build and validate claude_desktop_config.json and .cursor/mcp.json files with Windows cmd /c wrapping and official presets.
- [llms.txt & GEO Manifest Generator](https://devtoken.codeap.com/tools/llms-txt-generator): Generate standards-compliant /llms.txt files for AI search engines (ChatGPT Search, Perplexity, Claude).
- [JSON to OpenAI Structured Output & Zod Converter](https://devtoken.codeap.com/tools/json-schema-zod-converter): Convert sample JSON payloads into strict:true OpenAI JSON Schema (additionalProperties: false) and TypeScript Zod schemas.

## Reference & Compliance

- [Methodology & Live OpenRouter Sync](https://devtoken.codeap.com/about): Dual-mode live pricing architecture and client-side privacy guarantee.
- [Privacy Policy](https://devtoken.codeap.com/privacy): Zero server upload guarantee and local storage controls.
- [XML Sitemap](https://devtoken.codeap.com/sitemap.xml): Complete crawlable URL index.