9 min read·
Ship AI Prompt Files for Cursor, Claude Code, Copilot
Compare CLAUDE.md, Cursor rules, Copilot instructions, and Windsurf rules. What goes in each prompt file for API consumers. By RoxyAPI.
Brett Calloway
Developer Advocate & AI Integration Specialist
United States
Brett Calloway has 12 years of experience building APIs and developer tooling, including three years focused on AI-native infrastructure for spiritual and wellness applications. He writes on building context-rich AI agents using Model Context Protocol, drawing on a developer relations background. His coverage spans API integration patterns, AI agent architecture, and rapid prototyping with astrology, tarot, and numerology data.
12 years in API developmentDeveloper relations backgroundWriting on AI agents and MCP
API integrationAI agentsModel Context ProtocolDeveloper toolsAstrology APIMCP
43 articles published
Articles by Brett Calloway
13 min read·
Add Tarot Readings to a Shopify Store with App Proxy
Add a tarot card of the day, daily horoscope, kundli, and post-checkout numerology to a Shopify store via App Proxy. One pattern for all 10 domains.
12 min read·
Astrology Widget for WordPress: Shortcode and Block Tutorial
Add a daily horoscope, natal chart, kundli, and Life Path widget to WordPress with one shortcode pattern, transient caching, and a custom REST proxy.
11 min read·
AGENTS.md vs llms.txt vs ai-plugin.json vs agent-card.json
Four agent-discovery files, four different consumers. Compare AGENTS.md, llms.txt, ai-plugin.json, and agent-card.json with byte sizes and shipping rules.
12 min read·
Build a Voice Astrology Agent with Vapi and Remote MCP
Wire a Vapi voice assistant to a Remote MCP astrology server in under 30 minutes. Step-by-step setup, web SDK embed, cost breakdown by RoxyAPI.
17 min read·
How to Add Numerology Features to Your Dating App (Complete API Guide)
Add numerology-powered matchmaking to a dating app with three endpoints: chart, compatibility, and personal year. Working code, caching, multi-language, MCP shortcut.
9 min read·
Astrology API Accuracy Benchmark vs NASA JPL Horizons DE441
Open MIT-licensed reproducible benchmark for any astrology API. 210 planet positions across 21 charts vs NASA JPL Horizons DE441 reference.
13 min read·
How to Build an AI Astrology Chatbot in 30 Minutes
Beginner step by step guide to launching a free AI astrology chatbot covering Vedic, tarot, numerology, and dream readings. Clone, add keys, deploy live.
12 min read·
Build an Insight App in Node.js: Astrology, Vedic, Tarot APIs (2026)
Node.js tutorial to build an astrology app covering Western charts, Vedic kundli, panchang, and tarot with the Roxy TypeScript SDK. Typed, Promise-based, by RoxyAPI.
10 min read·
Build an Insight App in Python: Astrology, Vedic, Tarot APIs (2026)
Python tutorial to build an astrology app covering Western charts, Vedic kundli, panchang, and tarot with the Roxy Python SDK. Typed, async-ready, by RoxyAPI.
11 min read·
Connecting Claude Code to 10 Remote MCP Servers (Real Transcript)
How a developer connected Claude Code to 10 remote MCP servers in 30 minutes. Tool discovery trace, config, and latency. By RoxyAPI.
12 min read·
MCP Registries in 2026: Where to List Your Server for AI Tool Discovery
Directory of MCP registries in 2026. mcp.so, smithery.ai, glama.ai, awesome-mcp-servers. Submission guides for each. By RoxyAPI.
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