feat: add OpenSea plugin for swaps, marketplace, and drops#67
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CodySearsOS wants to merge 2 commits into
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feat: add OpenSea plugin for swaps, marketplace, and drops#67CodySearsOS wants to merge 2 commits into
CodySearsOS wants to merge 2 commits into
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Adds OpenSea as a hybrid plugin for Base MCP covering: - Token swaps via cross-chain DEX aggregator - NFT drops/minting with direct calldata mapping - NFT marketplace trading (buy, sell, cross-chain fulfill) Uses CLI-first pattern (like Morpho/Avantis) with OpenSea MCP fallback for read operations on no-shell surfaces. All endpoints require API key - agent self-provisions via POST /api/v2/auth/keys. Also adds OpenSea to the native plugins table in SKILL.md. Co-Authored-By: cody.sears@opensea.io <cody.sears@opensea.io>
Restructures the OpenSea plugin to match the standardized plugin spec: - Full YAML frontmatter (tags, name, version, integration, chains, requires, auth, risk) - Canonical section names and ordering (Overview, Detection, Installation, Auth, Surface Routing, Commands, Orchestration, Submission, Example Prompts, Risks & Warnings, Notes) - Separate Submission section naming send_calls with exact mappings - Risks & Warnings with per-tag hazard/guardrail bullets - Verified CLI commands and MCP tool params against latest opensea-devtools skill Co-Authored-By: cody.sears@opensea.io <cody.sears@opensea.io>
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🟡 Heimdall Review Status
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stephancill
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Jun 4, 2026
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stephancill
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Thanks for the submission. The plugin is well-structured and the Seaport fulfillment path maps into send_calls. A couple of correctness issues need to be addressed before merge:
Required
- Revert the
SKILL.mdplugins-table row. Plugins shouldn't add themselves to the registry — maintainers will register them when the program is ready. Limit the PR toplugins/opensea.mdplus the net-new tag-vocabulary additions noted below. requires.allowlistis[], but the plugin makes direct HTTPS calls toapi.opensea.ioand uses the OpenSea MCP atmcp.opensea.io. Add both hosts so chat-only surfaces can reach them.- The REST fulfillment path returns decoded
input_data(a struct) plus afunctionsignature — not hex calldata. The documentedcurl POST /listings/fulfillment_data -> send_callspath therefore requires ABI-encodingfulfillAdvancedOrderbeforesend_calls. Either document the encoding step explicitly, or restrict fulfillment to the CLI path (which encodes internally).
Minor
- Tags
nft,marketplace,dropsare net-new; add them to the shared vocabulary list inskills/base-mcp/references/plugin-spec.md(thetagsentry under "Choosing each field's value"), as the spec instructs when introducing a new tag. cliPackageshould be the full invocation (npx @opensea/cli@latest).- Free-tier rate limits are stated as 120/60/60; the API returns 60/5/5. Key creation via
POST /api/v2/auth/keysis additionally limited to 1 key/hour, so on-demand minting will fail on repeat — document this. get_collection_statsis stale relative to the live MCP tool catalog; verify tool names against the catalog.
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