# HarperZ9

> Open-source publisher. Listings imported from github.com/HarperZ9 — credited to the original author with their license.

- **Listings:** 3
- **Total installs:** 0
- **Profile:** https://agentstack.voostack.com/s/harperz9
- **Website:** https://github.com/HarperZ9

## Published listings

- [Accountable Surface](https://agentstack.voostack.com/l/mcp-harperz9-accountable-surface) — MCP server · Free · security-reviewed — `agentstack add mcp-harperz9-accountable-surface`
  Gate AI-agent actions with explicit grants, durable journals, MCP server support, and verification.
- [Relay](https://agentstack.voostack.com/l/mcp-harperz9-relay) — MCP server · Free · security-reviewed — `agentstack add mcp-harperz9-relay`
  A zero-dep, accountable coding agent for any model endpoint: local + subscription + API/provider/cloud, automatic failover, a permission-checked tool loop, and a hash-chained re-verifiable run ledger.
- [Coherence Membrane](https://agentstack.voostack.com/l/mcp-harperz9-coherence-membrane) — MCP server · Free · security-reviewed — `agentstack add mcp-harperz9-coherence-membrane`
  Give AI agents inspectable observations of files, images, screens, and context with receipt-backed perception.

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Seller on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Install any with `agentstack add <slug>`.