What problem does it solve? Finding and safely purchasing items through decentralized marketplaces requires monitoring listings across relays, filtering out scams, verifying seller claims, and negotiating terms — all without leaking personal data or trusting third-party brokers. This Skill automates that seeking-agent workflow over the chaos Nostr+MCP protocol. ## Core Features & Use Cases - Filtered Listing Discovery: Builds NIP REQ filters from the vertical's tag schema, subscribes via nostr_subscribe, and deduplicates events across relays so each listing is surfaced only once. - Structured Evaluation Rubric: Applies hard red flags (auto-suppress), soft red flags (warn), and green flags (boost) before notifying the user, using local capability MCPs and signed attestations instead of commercial data brokers. - MCP Inquiry & Negotiation: Opens a NIP-17 sealed handshake, connects to the offering agent's MCP server, requests photos/documents, verifies Schnorr-signed attestations, and drafts offers via submit_offer with a 5-round cap. - Use Case: A user wants to buy a used item in a specific vertical. The agent maintains a saved filter, suppresses suspicious listings, fetches photos and documents directly from the seller's agent, computes a defensible offer from market comps, and only commits after explicit user confirmation. ## Quick Start Tell the agent what you are looking for in this vertical so it can build a Nostr subscription filter and start evaluating matching listings for you.
