Open Source Projects
Open source is a core part of how we work. At Call O Buzz Services, we build and maintain open source projects that reflect our engineering standards and the way we think about architecture.
COB Shopify MCP
MCP Server and CLI for AI-Powered Shopify Store Management
A dual-mode tool that works as both an MCP server for AI agents (Claude, Cursor, Windsurf) and a standalone CLI for Shopify store management. 49 tools across 5 domains connect the Shopify Admin GraphQL API to AI platforms, covering everything from product management to analytics.
Key Features
49 Tools, 5 Domains
Products, Orders, Customers, Inventory, and Analytics: full Shopify store coverage via GraphQL
Dual-Mode: MCP + CLI
Use it as an MCP server for AI agents, or as a standalone CLI with no MCP required for terminal workflows
3-Tier Tool System
Tier 1 safe tools enabled by default, Tier 2 sensitive ops opt-in, Tier 3 custom YAML definitions
Type-Safe & Validated
Full TypeScript with Zod v4 schemas for runtime validation across every tool input and output
Cost Tracking & Rate Limiting
Respects Shopify's 1000-point budget with cost-based throttling, caching, and exponential backoff
3 Auth Methods & Transports
Static token, OAuth client credentials, or OAuth auth code. stdio and Streamable HTTP transports
Architecture Highlights
Technologies Used
Use Cases
How the Architecture Works
The design is layered. Auth Manager, Rate Limiter, Cache Layer, and Retry Engine work together to keep communication with Shopify's API reliable and cost-efficient. Every request is validated, throttled, cached, and audited.
More Open Source Projects
COB Claude Meter
CLI Tool for Claude Code Token Usage Tracking & Cost Estimation
Know exactly what your Claude Code usage costs. Track tokens across Opus, Sonnet, and Haiku, estimate costs with exact cache breakdowns, and watch usage in real-time, all from your terminal. Comes with live watch mode, Claude Code statusline integration, and JSON output. 100% local, zero config, cross-platform.
COB Gifomatic
Automatic Video to GIF Converter with Scene Detection
A web app that splits a video into GIFs on its own. Upload a clip, and it spots the scene changes, cuts the video at each one, and converts every segment to a GIF in real-time.
More Projects Coming Soon
We're actively building new open source tools across AI, developer tooling, and automation. Every project we release reflects our commitment to:
Interested in Collaborating?
We're always open to teaming up on open source projects worth building.