Opensea API

What it does

When your agent uses it

• Tasks that involve Crypto and DeFi analysis
• Tasks that involve Shell scripting
• Tasks that involve Trading and backtesting

Example prompts

• “/opensea-api”

Requirements

• Node.js
• A Bash shell
• A credential in OPENSEA_API_KEY

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

1. 1Verify your API key works — run a single test request first
2. 2Check for already-running processes — avoid concurrent API usage on the same key
3. 3Test with limit=1 — confirm the query shape and response format before fetching large datasets
4. 4Run sequentially, not in parallel — execute one request at a time, waiting for each to complete before starting the next

What it can do on your machine

Read from SKILL.md and the folder at commit dc47eed. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Ships 16 files in scripts/ (Shell, from the files we listed), which the agent can run.

  Shell commands in SKILL.md call:

  • npm
  • npx
  • curl
  • jq

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Hosts in commands or code, which the agent is likely to contact:

  • mcp.opensea.io
  • api.opensea.io

  Also links to:

  • github.com
  • opensea.io
  • docs.opensea.io

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names these keys or tokens, usually read from environment variables:

  • OPENSEA_API_KEY

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Opensea API loads about 5.4k tokens when it runs, and up to ~7.1k if it reads all its reference files. Until then it costs about 87 tokens; SKILL.md has 1,984 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~87

When it runs · the whole SKILL.md, loaded when a task matches

~5.4k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~7.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from BankrBot/skills at commit dc47eed, republished under its MIT licence (© BankrBot). 1,984 words, ~5,383 tokens.

name

opensea-api

description

Query OpenSea marketplace data via the official CLI, MCP server, or shell scripts. Get floor prices, collection stats, NFT details, token data, trending collections, drops, events, and search across Ethereum, Base, Arbitrum, Polygon, and more. Read-only operations; for trading use opensea-marketplace, for token swaps use opensea-swaps.

homepage

https://github.com/ProjectOpenSea/opensea-skill

repository

https://github.com/ProjectOpenSea/opensea-skill

license

MIT

dependencies

node >= 18.0.0, curl, jq (recommended)

# Get an instant free-tier API key (no signup needed)
export OPENSEA_API_KEY=$(curl -s -X POST https://api.opensea.io/api/v2/auth/keys | jq -r '.api_key')

# Install the CLI globally (or use npx)
npm install -g @opensea/cli

# Get collection info
opensea collections get boredapeyachtclub

# Get floor price and volume stats
opensea collections stats boredapeyachtclub

# Get NFT details
opensea nfts get ethereum 0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d 1234

# Search across OpenSea
opensea search "cool cats"

# Get trending tokens
opensea tokens trending --limit 5

opensea nfts list-by-collection doodles-official \
  --traits '[{"traitType":"Background","value":"Red"}]'

npm install -g @opensea/cli
# Or use without installing
npx @opensea/cli collections get mfers

export OPENSEA_API_KEY="your-api-key"
opensea collections get mfers

opensea collections list --limit 5
opensea collections list --limit 5 --next "LXBrPTEwMDA..."

import { OpenSeaCLI, OpenSeaAPIError } from "@opensea/cli"

const client = new OpenSeaCLI({ apiKey: process.env.OPENSEA_API_KEY })

const collection = await client.collections.get("mfers")
const { nfts } = await client.nfts.listByCollection("mfers", { limit: 5 })
const { listings } = await client.listings.best("mfers", { limit: 10 })
const results = await client.search.query("mfers", { limit: 5 })

{
  "mcpServers": {
    "opensea": {
      "url": "https://mcp.opensea.io/mcp",
      "headers": {
        "X-API-KEY": "<OPENSEA_API_KEY>"
      }
    }
  }
}

© BankrBot, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 27 other files (scripts, references) in opensea/opensea-api of BankrBot/skills.

• SKILL.md
• references/rest-api.md
• references/stream-api.md
• scripts/opensea-account-nfts.sh
• scripts/opensea-auth-request-key.sh
• scripts/opensea-best-listing.sh
• scripts/opensea-best-offer.sh
• scripts/opensea-collection-nfts.sh
• scripts/opensea-collection-stats.sh
• scripts/opensea-collection.sh
• scripts/opensea-collections-top.sh
• scripts/opensea-collections-trending.sh
• scripts/opensea-drop-mint.sh
• scripts/opensea-drop.sh
• scripts/opensea-drops.sh
• scripts/opensea-events-collection.sh
• scripts/opensea-get.sh
• scripts/opensea-listings-collection.sh
• scripts/opensea-listings-nft.sh
• … and 9 more

Open the folder on GitHubat commit dc47eed