OpenSea Tool SDK

Build, register, and gate AI-callable tool endpoints using the OpenSea Tool Registry (ERC-8257) on Base.

When to use this skill (scope_in)

Use opensea-tool-sdk when you need to:

• Scaffold an AI-callable tool endpoint (HTTPS, JSON Schema, .well-known manifest) for Vercel, Cloudflare, or Express
• Register a tool onchain on the Base ToolRegistry so other agents can discover it
• Gate access via x402 pay-per-call (USDC) or predicates (ERC-721/ERC-1155 ownership, subscriptions, trait gating, ERC-20 balance, composites)
• Call a gated or paid tool: 402 payments (paidFetch), predicate-gated auth (eip3009AuthenticatedFetch), or both (paidAuthenticatedFetch)
• Search and discover registered tools via the OpenSea REST API

When NOT to use this skill (scope_out, handoff)