{
"id": "brRSLvIkYp3mLq0K",
"meta": {
"instanceId": "a5283507e1917a33cc3ae615b2e7d5ad2c1e50955e6f831272ddd5ab816f3fb6"
},
"name": "OpenSea Marketplace Agent Tool",
"tags": [],
"nodes": [
{
"id": "13579b30-83df-4da6-b0de-90eeaf3252e7",
"name": "Marketplace Agent Brain",
"type": "@n8n\/n8n-nodes-langchain.lmChatOpenAi",
"position": [
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],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4o-mini"
},
"options": []
},
"credentials": {
"openAiApi": {
"id": "yUizd8t0sD5wMYVG",
"name": "OpenAi account"
}
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{
"id": "9f979fae-49c6-4a50-b96b-92de5a49ba14",
"name": "Marketplace Agent Memory",
"type": "@n8n\/n8n-nodes-langchain.memoryBufferWindow",
"position": [
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"parameters": [],
"typeVersion": 1.3000000000000000444089209850062616169452667236328125
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{
"id": "202ca463-f038-46df-99ea-84fbda70a933",
"name": "OpenSea Marketplace Agent",
"type": "@n8n\/n8n-nodes-langchain.agent",
"position": [
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],
"parameters": {
"text": "={{ $json.message }}",
"options": {
"systemMessage": "### **\ud83d\uded2 OpenSea Marketplace Agent Overview**\nThis agent interacts with the OpenSea marketplace API to retrieve marketplace data, including NFT listings, offers, orders, and trait-specific data. The system follows strict input requirements to ensure compatibility with OpenSea API rules.\n\n---\n\n## **\u26a1 Available Tools & Usage Guidelines**\nThe OpenSea Marketplace Agent has access to the following marketplace-related tools:\n\n---\n\n### **1\ufe0f\u20e3 Get All Listings (by Collection)**\n\ud83d\udccd **Endpoint**: `\/api\/v2\/listings\/collection\/{collection_slug}\/all` \n\ud83d\udd39 **Description**: Retrieves all active, valid listings for a given collection. \n\ud83d\udd39 **Required Parameter**: \n - `collection_slug` \u2192 The unique collection identifier from OpenSea. \n\ud83d\udd39 **Optional Query Parameters**: \n - `limit` \u2192 Number of listings to return (1-100, default: 100). \n - `next` \u2192 Cursor for pagination. \n\ud83d\udd39 **Example Query**: \n - _\"Retrieve all active listings for the 'boredapeyachtclub' collection.\"_ \n\n---\n\n### **2\ufe0f\u20e3 Get All Offers (by Collection)**\n\ud83d\udccd **Endpoint**: `\/api\/v2\/offers\/collection\/{collection_slug}\/all` \n\ud83d\udd39 **Description**: Retrieves all valid offers for a given NFT collection, including individual and criteria-based offers. \n\ud83d\udd39 **Required Parameter**: \n - `collection_slug` \u2192 The unique collection identifier from OpenSea. \n\ud83d\udd39 **Optional Query Parameters**: \n - `limit` \u2192 Number of offers to return (1-100, default: 100). \n - `next` \u2192 Cursor for pagination. \n\ud83d\udd39 **Example Query**: \n - _\"Fetch all current offers for 'azuki' collection.\"_ \n\n---\n\n### **3\ufe0f\u20e3 Get Best Listing (by NFT)** \n\ud83d\udccd **Endpoint**: `\/api\/v2\/listings\/collection\/{collection_slug}\/nfts\/{identifier}\/best` \n\ud83d\udd39 **Description**: Retrieves the best (cheapest) active listing for a specific NFT. \n\ud83d\udd39 **Required Parameters**: \n - `collection_slug` \u2192 The collection identifier. \n - `identifier` \u2192 The NFT token ID. \n\ud83d\udd39 **Optional Query Parameters**: \n - `include_private_listings` \u2192 Boolean (default: `false`). \n\ud83d\udd39 **Example Query**: \n - _\"Find the lowest-priced listing for NFT #1234 in 'doodles' collection.\"_ \n\n---\n\n### **4\ufe0f\u20e3 Get Best Listings (by Collection)** \n\ud83d\udccd **Endpoint**: `\/api\/v2\/listings\/collection\/{collection_slug}\/best` \n\ud83d\udd39 **Description**: Retrieves the lowest-priced active listings for a specific collection. \n\ud83d\udd39 **Required Parameter**: \n - `collection_slug` \u2192 The collection identifier. \n\ud83d\udd39 **Optional Query Parameters**: \n - `include_private_listings` \u2192 Boolean (default: `false`). \n - `limit` \u2192 Number of listings to return (1-100, default: 100). \n - `next` \u2192 Cursor for pagination. \n\ud83d\udd39 **Example Query**: \n - _\"Get the 10 cheapest listings for 'mutantapeyachtclub'.\"_ \n\n---\n\n### **5\ufe0f\u20e3 Get Best Offer (by NFT)** \n\ud83d\udccd **Endpoint**: `\/api\/v2\/offers\/collection\/{collection_slug}\/nfts\/{identifier}\/best` \n\ud83d\udd39 **Description**: Retrieves the highest offer made for a specific NFT. \n\ud83d\udd39 **Required Parameters**: \n - `collection_slug` \u2192 The collection identifier. \n - `identifier` \u2192 The NFT token ID. \n\ud83d\udd39 **Example Query**: \n - _\"Find the highest offer for NFT #5678 in 'moonbirds' collection.\"_ \n\n---\n\n### **6\ufe0f\u20e3 Get Collection Offers** \n\ud83d\udccd **Endpoint**: `\/api\/v2\/offers\/collection\/{collection_slug}` \n\ud83d\udd39 **Description**: Retrieves all active collection-wide offers for a specific NFT collection. \n\ud83d\udd39 **Required Parameter**: \n - `collection_slug` \u2192 The collection identifier. \n\ud83d\udd39 **Example Query**: \n - _\"List all collection offers for 'clonex'.\"_ \n\n---\n\n### **7\ufe0f\u20e3 Get Item Offers** \n\ud83d\udccd **Endpoint**: `\/api\/v2\/orders\/{chain}\/{protocol}\/offers` \n\ud83d\udd39 **Description**: Retrieves all valid **individual** offers (excluding criteria-based offers). \n\ud83d\udd39 **Required Parameters**: \n - `chain` \u2192 The blockchain network (must use an **allowed chain**, see below). \n - `protocol` \u2192 The token settlement protocol (only `\"seaport\"` is supported). \n\ud83d\udd39 **Optional Query Parameters**: \n - `asset_contract_address`, `cursor`, `limit`, `listed_after`, `listed_before`, `maker`, `order_by`, `order_direction`, `payment_token_address`, `taker`, `token_ids`. \n\ud83d\udd39 **Example Query**: \n - _\"Fetch all active item offers for NFTs on Ethereum using Seaport protocol.\"_ \n\n---\n\n### **8\ufe0f\u20e3 Get Listings (by Chain & Protocol)** \n\ud83d\udccd **Endpoint**: `\/api\/v2\/orders\/{chain}\/{protocol}\/listings` \n\ud83d\udd39 **Description**: Retrieves all active listings filtered by blockchain and protocol. \n\ud83d\udd39 **Required Parameters**: \n - `chain` \u2192 The blockchain network (**must be an allowed chain**). \n - `protocol` \u2192 `\"seaport\"` protocol. \n\ud83d\udd39 **Optional Query Parameters**: \n - `asset_contract_address`, `cursor`, `limit`, `listed_after`, `listed_before`, `maker`, `order_by`, `order_direction`, `payment_token_address`, `taker`, `token_ids`. \n\ud83d\udd39 **Example Query**: \n - _\"Retrieve all active listings for Ethereum Seaport orders.\"_ \n\n---\n\n### **9\ufe0f\u20e3 Get Order (Single Order by Hash)** \n\ud83d\udccd **Endpoint**: `\/api\/v2\/orders\/chain\/{chain}\/protocol\/{protocol_address}\/{order_hash}` \n\ud83d\udd39 **Description**: Retrieves a specific order (offer or listing) based on its hash. \n\ud83d\udd39 **Required Parameters**: \n - `chain` \u2192 The blockchain network (**must be an allowed chain**). \n - `protocol_address` \u2192 **Always set to** `0x0000000000000068f116a894984e2db1123eb395`. \n - `order_hash` \u2192 The hash of the order. \n\ud83d\udd39 **Example Query**: \n - _\"Fetch details for order `0x123abc...` on Ethereum.\"_ \n\n---\n\n### **\ud83d\udd1f Get Trait Offers** \n\ud83d\udccd **Endpoint**: `\/api\/v2\/offers\/collection\/{collection_slug}\/traits` \n\ud83d\udd39 **Description**: Retrieves all active offers made for a specific trait in a collection. \n\ud83d\udd39 **Required Parameter**: \n - `collection_slug` \u2192 The collection identifier. \n\ud83d\udd39 **Optional Query Parameters**: \n - `float_value`, `int_value`, `type`, `value`. \n\ud83d\udd39 **Example Query**: \n - _\"Find all offers for 'Background: Blue' in the 'azuki' collection.\"_ \n\n---\n\n## **\u26a0\ufe0f Critical Notes & Restrictions**\n1. **Only Allowed Blockchains Can Be Used** \n - \u2705 Supported Chains: \n - `amoy`, `ape_chain`, `ape_curtis`, `arbitrum`, `arbitrum_nova`, `arbitrum_sepolia`, `avalanche`, `avalanche_fuji`, `b3`, `b3_sepolia`, `baobab`, `base`, `base_sepolia`, `bera_chain`, `blast`, `blast_sepolia`, `ethereum`, `flow`, `flow_testnet`, `klaytn`, `matic`, `monad_testnet`, `mumbai`, `optimism`, `optimism_sepolia`, `sei_testnet`, `sepolia`, `shape`, `solana`, `soldev`, `soneium`, `soneium_minato`, `unichain`, `zora`, `zora_sepolia`. \n - \u274c **Incorrect Chain Inputs Will Cause Errors** \n - `\"polygon\"` \u274c **will fail**. Use `\"matic\"` instead.\n\n2. **Protocol Must Be `\"seaport\"` for Item & Listing Queries** \n - The `\"protocol\"` field must always be set to `\"seaport\"`.\n\n3. **Fixed Protocol Address for Get Order** \n - **For retrieving a specific order**, the `protocol_address` **must always be**: \n - `0x0000000000000068f116a894984e2db1123eb395`.\n\n---\n\n## **\u2705 Example Queries**\n- _\"Fetch all best listings for Ethereum NFTs.\"_ \n- _\"Find the highest offer for a Bored Ape #456.\"_ \n- _\"Get details for a specific order hash.\"_ \n\n\ud83d\ude80 **Follow these rules to ensure successful API queries!**"
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{
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"name": "Workflow Input Trigger",
"type": "n8n-nodes-base.executeWorkflowTrigger",
"position": [
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],
"parameters": {
"workflowInputs": {
"values": [
{
"name": "message"
},
{
"name": "sessionId"
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}
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{
"id": "e25c62f0-1047-4fbb-815c-caeaa22d2fe1",
"name": "OpenSea Get All Listings by Collection",
"type": "@n8n\/n8n-nodes-langchain.toolHttpRequest",
"position": [
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],
"parameters": {
"url": "https:\/\/api.opensea.io\/api\/v2\/listings\/collection\/{collection_slug}\/all",
"sendQuery": true,
"sendHeaders": true,
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"parametersQuery": {
"values": [
{
"name": "limit",
"valueProvider": "modelOptional"
},
{
"name": "next",
"valueProvider": "modelOptional"
}
]
},
"toolDescription": "This tool retrieves all active, valid listings for a single NFT collection on OpenSea, allowing pagination and limit options.",
"parametersHeaders": {
"values": [
{
"name": "Accept",
"value": "application\/json",
"valueProvider": "fieldValue"
}
]
}
},
"credentials": {
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"id": "3v99GVMGF4tKP5nM",
"name": "OpenSea"
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{
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"name": "OpenSea Get All Offers by Collection",
"type": "@n8n\/n8n-nodes-langchain.toolHttpRequest",
"position": [
240,
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],
"parameters": {
"url": "https:\/\/api.opensea.io\/api\/v2\/offers\/collection\/{collection_slug}\/all",
"sendQuery": true,
"sendHeaders": true,
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"parametersQuery": {
"values": [
{
"name": "limit",
"valueProvider": "modelOptional"
},
{
"name": "next",
"valueProvider": "modelOptional"
}
]
},
"toolDescription": "This tool retrieves all active, valid offers for a specified NFT collection on OpenSea, including individual and criteria offers.",
"parametersHeaders": {
"values": [
{
"name": "Accept",
"value": "application\/json",
"valueProvider": "fieldValue"
}
]
}
},
"credentials": {
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{
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"name": "OpenSea Get Best Listing by NFT",
"type": "@n8n\/n8n-nodes-langchain.toolHttpRequest",
"position": [
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],
"parameters": {
"url": "https:\/\/api.opensea.io\/api\/v2\/listings\/collection\/{collection_slug}\/nfts\/{identifier}\/best",
"sendQuery": true,
"sendHeaders": true,
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"parametersQuery": {
"values": [
{
"name": "include_private_listings",
"valueProvider": "modelOptional"
}
]
},
"toolDescription": "This tool retrieves the best available listing for a specific NFT from OpenSea.",
"parametersHeaders": {
"values": [
{
"name": "Accept",
"value": "application\/json",
"valueProvider": "fieldValue"
}
]
}
},
"credentials": {
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{
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"name": "OpenSea Get Best Listings by Collection",
"type": "@n8n\/n8n-nodes-langchain.toolHttpRequest",
"position": [
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],
"parameters": {
"url": "https:\/\/api.opensea.io\/api\/v2\/listings\/collection\/{collection_slug}\/best",
"sendQuery": true,
"sendHeaders": true,
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"parametersQuery": {
"values": [
{
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"valueProvider": "modelOptional"
},
{
"name": "limit",
"valueProvider": "modelOptional"
},
{
"name": "next",
"valueProvider": "modelOptional"
}
]
},
"toolDescription": "This tool retrieves the cheapest active and valid listings for a specific NFT collection on OpenSea.",
"parametersHeaders": {
"values": [
{
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"value": "application\/json",
"valueProvider": "fieldValue"
}
]
}
},
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{
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"name": "OpenSea Get Best Offer by NFT",
"type": "@n8n\/n8n-nodes-langchain.toolHttpRequest",
"position": [
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],
"parameters": {
"url": "https:\/\/api.opensea.io\/api\/v2\/offers\/collection\/{collection_slug}\/nfts\/{identifier}\/best",
"sendHeaders": true,
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"toolDescription": "This tool retrieves the best offers for a specific NFT on OpenSea.",
"parametersHeaders": {
"values": [
{
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"value": "application\/json",
"valueProvider": "fieldValue"
}
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}
},
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{
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"name": "OpenSea Get Collection Offers",
"type": "@n8n\/n8n-nodes-langchain.toolHttpRequest",
"position": [
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],
"parameters": {
"url": "https:\/\/api.opensea.io\/api\/v2\/offers\/collection\/{collection_slug}",
"sendHeaders": true,
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"toolDescription": "This tool retrieves the active, valid collection offers for a specified NFT collection on OpenSea.",
"parametersHeaders": {
"values": [
{
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"value": "application\/json",
"valueProvider": "fieldValue"
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{
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"name": "OpenSea Get Item Offers",
"type": "@n8n\/n8n-nodes-langchain.toolHttpRequest",
"position": [
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],
"parameters": {
"url": "https:\/\/api.opensea.io\/api\/v2\/orders\/{chain}\/{protocol}\/offers",
"sendQuery": true,
"sendHeaders": true,
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"parametersQuery": {
"values": [
{
"name": "asset_contract_address",
"valueProvider": "modelOptional"
},
{
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"valueProvider": "modelOptional"
},
{
"name": "limit",
"valueProvider": "modelOptional"
},
{
"name": "listed_after",
"valueProvider": "modelOptional"
},
{
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"valueProvider": "modelOptional"
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{
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{
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"valueProvider": "modelOptional"
},
{
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"valueProvider": "modelOptional"
},
{
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},
{
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"valueProvider": "modelOptional"
},
{
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"valueProvider": "modelOptional"
}
]
},
"toolDescription": "This tool retrieves active, valid individual offers for NFTs on OpenSea. It does not include criteria offers.",
"parametersHeaders": {
"values": [
{
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"value": "application\/json",
"valueProvider": "fieldValue"
}
]
}
},
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{
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"name": "OpenSea Get Listings",
"type": "@n8n\/n8n-nodes-langchain.toolHttpRequest",
"position": [
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],
"parameters": {
"url": "https:\/\/api.opensea.io\/api\/v2\/orders\/{chain}\/{protocol}\/listings",
"sendQuery": true,
"sendHeaders": true,
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"parametersQuery": {
"values": [
{
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"valueProvider": "modelOptional"
},
{
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"valueProvider": "modelOptional"
},
{
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"valueProvider": "modelOptional"
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{
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"valueProvider": "modelOptional"
},
{
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"valueProvider": "modelOptional"
},
{
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{
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},
{
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},
{
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"valueProvider": "modelOptional"
},
{
"name": "taker",
"valueProvider": "modelOptional"
},
{
"name": "token_ids",
"valueProvider": "modelOptional"
}
]
},
"toolDescription": "This tool retrieves the complete set of active, valid listings for NFTs on OpenSea.",
"parametersHeaders": {
"values": [
{
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"value": "application\/json",
"valueProvider": "fieldValue"
}
]
}
},
"credentials": {
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"name": "OpenSea"
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{
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"name": "OpenSea Get Trait Offers",
"type": "@n8n\/n8n-nodes-langchain.toolHttpRequest",
"position": [
1900,
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],
"parameters": {
"url": "https:\/\/api.opensea.io\/api\/v2\/offers\/collection\/{collection_slug}\/traits",
"sendQuery": true,
"sendHeaders": true,
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"parametersQuery": {
"values": [
{
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"valueProvider": "modelOptional"
},
{
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"valueProvider": "modelOptional"
},
{
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"valueProvider": "modelOptional"
},
{
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"valueProvider": "modelOptional"
}
]
},
"toolDescription": "This tool retrieves the active, valid trait offers for a specified collection on OpenSea.",
"parametersHeaders": {
"values": [
{
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"value": "application\/json",
"valueProvider": "fieldValue"
}
]
}
},
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"name": "OpenSea"
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{
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"name": "OpenSea Get Order",
"type": "@n8n\/n8n-nodes-langchain.toolHttpRequest",
"position": [
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],
"parameters": {
"url": "https:\/\/api.opensea.io\/api\/v2\/orders\/chain\/{chain}\/protocol\/0x0000000000000068f116a894984e2db1123eb395\/{order_hash}",
"sendQuery": true,
"sendHeaders": true,
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"parametersQuery": {
"values": [
{
"name": "chain"
},
{
"name": "order_hash"
}
]
},
"toolDescription": "This tool retrieves a single order (offer or listing) from OpenSea using its order hash. Protocol and Chain are required to prevent hash collisions. The protocol address is always set to 0x0000000000000068f116a894984e2db1123eb395.",
"parametersHeaders": {
"values": [
{
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"value": "application\/json",
"valueProvider": "fieldValue"
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]
}
},
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{
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"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
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],
"parameters": {
"color": 2,
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"content": "# OpenSea Marketplace Agent Tool (n8n Workflow) Guide\n\n## \ud83d\ude80 Workflow Overview\nThe **OpenSea Marketplace Agent Tool** is an **AI-driven marketplace analytics system** for **NFT trading insights**. This tool integrates with **OpenSea's API** to fetch and analyze **NFT listings, offers, orders, and trait-specific data**, helping traders and collectors make informed decisions.\n\n### \ud83c\udfaf **Key Features**:\n- Retrieve **active NFT listings** for a collection.\n- Fetch **valid offers** for individual NFTs or entire collections.\n- Find the **cheapest available NFT listings** by collection or NFT.\n- Track **the highest offer** made for an NFT or collection-wide offers.\n- Access **detailed order data** based on order hash.\n- Ensure **API query compliance** to prevent errors.\n\n---\n\n## \ud83d\udd17 **Nodes & Functions**\n### **1\ufe0f\u20e3 Marketplace Agent Brain**\n- **Type**: AI Language Model (GPT-4o Mini)\n- **Purpose**: Processes marketplace-related API requests and user queries.\n\n### **2\ufe0f\u20e3 Marketplace Agent Memory**\n- **Type**: AI Memory Buffer\n- **Purpose**: Stores session data to maintain context across multiple queries.\n\n### **3\ufe0f\u20e3 OpenSea Get All Listings by Collection**\n- **Type**: API Request\n- **Endpoint**: `\/api\/v2\/listings\/collection\/{collection_slug}\/all`\n- **Function**: Retrieves all active listings for a given collection.\n\n### **4\ufe0f\u20e3 OpenSea Get All Offers by Collection**\n- **Type**: API Request\n- **Endpoint**: `\/api\/v2\/offers\/collection\/{collection_slug}\/all`\n- **Function**: Fetches all active offers made for NFTs in a collection.\n\n### **5\ufe0f\u20e3 OpenSea Get Best Listing by NFT**\n- **Type**: API Request\n- **Endpoint**: `\/api\/v2\/listings\/collection\/{collection_slug}\/nfts\/{identifier}\/best`\n- **Function**: Retrieves the **lowest-priced** active listing for a specific NFT.\n\n### **6\ufe0f\u20e3 OpenSea Get Best Listings by Collection**\n- **Type**: API Request\n- **Endpoint**: `\/api\/v2\/listings\/collection\/{collection_slug}\/best`\n- **Function**: Fetches the **cheapest listings** for a given NFT collection.\n\n### **7\ufe0f\u20e3 OpenSea Get Best Offer by NFT**\n- **Type**: API Request\n- **Endpoint**: `\/api\/v2\/offers\/collection\/{collection_slug}\/nfts\/{identifier}\/best`\n- **Function**: Retrieves the **highest offer** made for a specific NFT.\n\n### **8\ufe0f\u20e3 OpenSea Get Collection Offers**\n- **Type**: API Request\n- **Endpoint**: `\/api\/v2\/offers\/collection\/{collection_slug}`\n- **Function**: Retrieves all **active collection-wide offers**.\n\n### **9\ufe0f\u20e3 OpenSea Get Item Offers**\n- **Type**: API Request\n- **Endpoint**: `\/api\/v2\/orders\/{chain}\/{protocol}\/offers`\n- **Function**: Fetches **individual active offers** (excluding criteria-based offers).\n\n### **\ud83d\udd1f OpenSea Get Listings by Chain & Protocol**\n- **Type**: API Request\n- **Endpoint**: `\/api\/v2\/orders\/{chain}\/{protocol}\/listings`\n- **Function**: Retrieves all active **listings filtered by blockchain and protocol**.\n\n### **11\ufe0f\u20e3 OpenSea Get Order by Hash**\n- **Type**: API Request\n- **Endpoint**: `\/api\/v2\/orders\/chain\/{chain}\/protocol\/0x0000000000000068f116a894984e2db1123eb395\/{order_hash}`\n- **Function**: Fetches **a specific order (listing or offer)** based on its order hash.\n\n### **12\ufe0f\u20e3 OpenSea Get Trait Offers**\n- **Type**: API Request\n- **Endpoint**: `\/api\/v2\/offers\/collection\/{collection_slug}\/traits`\n- **Function**: Retrieves **active offers** for specific traits in a collection.\n\n---\n\n"
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"content": "\n## \ud83d\udccc **How to Use the Workflow**\n\n### \u2705 **Step 1: Input Data**\n- Provide required parameters such as `collection_slug`, `identifier`, `chain`, `protocol`, or `order_hash`.\n\n### \u2705 **Step 2: Execute API Calls**\n- The system processes requests and fetches NFT marketplace data.\n\n### \u2705 **Step 3: Analyze & Output Results**\n- Results can be integrated into dashboards, alerts, or Telegram notifications.\n\n---\n\n## \u26a0\ufe0f **Common API Queries & Examples**\n\n### **1\ufe0f\u20e3 Get All Listings for a Collection**\n```plaintext\nGET https:\/\/api.opensea.io\/api\/v2\/listings\/collection\/boredapeyachtclub\/all\n```\n\n### **2\ufe0f\u20e3 Get All Offers for a Collection**\n```plaintext\nGET https:\/\/api.opensea.io\/api\/v2\/offers\/collection\/azuki\/all\n```\n\n### **3\ufe0f\u20e3 Get Best Listing for an NFT**\n```plaintext\nGET https:\/\/api.opensea.io\/api\/v2\/listings\/collection\/doodles\/nfts\/1234\/best\n```\n\n### **4\ufe0f\u20e3 Get Best Offer for an NFT**\n```plaintext\nGET https:\/\/api.opensea.io\/api\/v2\/offers\/collection\/moonbirds\/nfts\/5678\/best\n```\n\n### **5\ufe0f\u20e3 Get Order Details by Order Hash**\n```plaintext\nGET https:\/\/api.opensea.io\/api\/v2\/orders\/chain\/ethereum\/protocol\/0x0000000000000068f116a894984e2db1123eb395\/0x123abc...\n```\n\n---\n\n"
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"content": "## \u26a1 **Error Handling & Troubleshooting**\n| **Error Code** | **Description** |\n|--------------|----------------|\n| `200` | Success |\n| `400` | Bad Request (Invalid input) |\n| `404` | Not Found (Incorrect slug, address, or identifier) |\n| `500` | Server Error (OpenSea API issue) |\n\n### \ud83d\udd39 **Fixing Common Errors**\n- Ensure correct **collection slug** and **NFT identifier**.\n- Always use `\"matic\"` instead of `\"polygon\"` for chain input.\n- Verify that the **protocol is set to `\"seaport\"`** where required.\n- **Order hash queries require the fixed protocol address:** `0x0000000000000068f116a894984e2db1123eb395`.\n- Retry after some time if the OpenSea API is experiencing downtime.\n\n---\n\n## \ud83d\ude80 **Connect with Me for Support**\nIf you need assistance, custom OpenSea marketplace insights, or automation support, feel free to connect with me on LinkedIn:\n\n\ud83c\udf10 **Don Jayamaha \u2013 LinkedIn** \n\ud83d\udd17 [http:\/\/linkedin.com\/in\/donjayamahajr](http:\/\/linkedin.com\/in\/donjayamahajr)\n"
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