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CardZero creates a USDC wallet on Base for an AI agent, while a human owner claims it and configures per-transaction limits, daily caps, address whitelists, and emergency freezing. Agents can check balances, pay for services, or use job escrow through a REST API, MCP server, and platform-specific integrations. The product is still in beta, its smart-contract audit is in progress, and the repository recommends keeping balances below 100 USDC.

yahoo-finance2 is an unofficial JavaScript API for retrieving quotes, charts, historical data, options, company summaries, screeners, and other Yahoo Finance results. Developers can call it as a library, use its command-line interface, or optionally expose the same tools through MCP and the bundled Agent Skill. It supports Node.js, Bun, Deno, and compatible Cloudflare runtimes, but it cannot run directly in a browser because of CORS and cookie constraints. Yahoo does not guarantee API availability or consistency.

Shadow signs each credit decision with Ed25519 and chains attestations with SHA-256 so a later verifier can detect silent changes to the verdict, reason codes, model manifest, or committed inputs and outputs. The verdict engine uses deterministic rules, while LLM personas provide advisory rationale that cannot alter the decision. The project sends no telemetry and explicitly remains pre-1.0 rather than a compliance product. It is a research layer for lenders building an auditable decision narrative.

PrivateGPT sits between an OpenAI-compatible local inference server and the applications built on top of it. Its API covers messages, file ingestion, citation-backed retrieval, custom tools, database and CSV access, and MCP connectors, following the Claude API as a reference. The included web interface is mainly a demonstrator and debugger; developers are expected to build their own user experience around the API.