opensea-marketplace

Buy and sell NFTs on OpenSea's Seaport marketplace. Fulfill listings, accept offers, create new orders, cross-chain purchases, and sweep multiple listings. Requires wallet signing; for read-only queries use opensea-api instead.

Quality

—

Does it follow best practices?

Impact

—

No eval scenarios have been run

Securityby

Advisory

Suggest reviewing before use

Quality

Content

100%

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The body is a well-structured, lean operational guide: executable commands, clearly sequenced workflows with explicit validation and error-recovery feedback loops, and proper progressive disclosure to real reference and script files. No notable weaknesses across the content dimensions.

Dimension	Reasoning	Score
Conciseness	Lean and operational — tables and short code blocks carry the content with no concept-overexplaining (no 'what is an NFT/Seaport' padding); every section earns its place for a multi-feature skill.	3 / 3
Actionability	Provides concrete, executable commands with real arguments and addresses (e.g., './scripts/opensea-fulfill-listing.sh ethereum 0x_order_hash 0x_your_wallet') plus a script-signature quick-reference table — copy-paste ready.	3 / 3
Workflow Clarity	Buy/sell/cross-chain flows are clearly numbered, with explicit validation ('Always verify fulfillment data before signing', 'Check order expiry') and feedback loops (404 re-query, 429/500 exponential backoff) for these destructive onchain operations.	3 / 3
Progressive Disclosure	SKILL.md is a concise overview with one-level-deep references to real bundle files (references/marketplace-api.md, references/seaport.md) and scripts — all verified to exist in the bundle — with clearly signaled navigation.	3 / 3
	Total	12 / 12 Passed

Description

82%

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description is specific and distinctive, naming five concrete trading actions and explicitly handing off read-only queries to a sibling skill. Its main gap is the absence of an explicit 'Use when...' trigger clause, which caps completeness at 2.

Suggestions

Add an explicit trigger clause such as 'Use when you need to execute NFT trades on OpenSea (buy, sell, fulfill listings, accept offers, sweep).' to lift completeness to 3.

Pair the jargon 'Seaport marketplace' with the user-facing term 'OpenSea marketplace' so the trigger terms stay natural for non-technical users.

Dimension	Reasoning	Score
Specificity	Lists multiple concrete actions — 'Fulfill listings, accept offers, create new orders, cross-chain purchases, and sweep multiple listings' — going well beyond merely naming the domain.	3 / 3
Completeness	Clearly states what the skill does, but lacks an explicit 'Use when...' trigger clause; the 'when' is only implied by the action list, and the guidelines cap completeness at 2 without explicit trigger guidance.	2 / 3
Trigger Term Quality	Uses natural terms a user would say when needing the skill — 'buy and sell NFTs', 'listings', 'offers', 'OpenSea' — with good coverage, despite the technical term 'Seaport'.	3 / 3
Distinctiveness Conflict Risk	Occupies a clear niche (OpenSea Seaport trade execution) and explicitly distinguishes itself with 'for read-only queries use opensea-api instead', lowering conflict risk.	3 / 3
	Total	11 / 12 Passed

Validation

87%

Warnings & errors only

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 14 / 16 Passed

Validation for skill structure

Criteria	Description	Result
frontmatter_unknown_keys	Unknown frontmatter key(s) found; consider removing or moving to metadata	Warning
relative_links	Relative link issues: 2 suspicious	Warning

	Total	14 / 16 Passed

Repository: ProjectOpenSea/opensea-skill
Commit: 142f269

Reviewed: 2 days ago

Table of Contents

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