# Vextorium NFT Collection On-Chain Profile

> Vextorium NFT Collection On-Chain Profile is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-19).

Fetches on-chain metadata for an NFT collection (ERC-721/1155) including name, symbol, total supply, contract owner, royalties, and token standard from Base, Ethereum, Arbitrum, Optimism, or Polygon.

## Facts

- Endpoint: POST https://api.vextorium.com/v1/nft-collection?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vextorium-nft-collection-on-chain-profile-165696e4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xVV4zbyOjmFTZVjF5a_MQ

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability vextorium-nft-collection-on-chain-profile-165696e4 -d '<json body>'
```

Example prompt: Look up the on-chain profile of the NFT collection at contract address 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D on Ethereum — I want to know its name, symbol, total supply, owner, royalties, and whether it's ERC-721 or ERC-1155.

## When to prefer this

Use this endpoint when you need authoritative, real-time on-chain data about an NFT collection directly from the smart contract rather than from a marketplace API or third-party index. Best for verifying contract ownership, checking royalty configurations, or confirming the token standard (ERC-721 vs ERC-1155) across Base, Ethereum, Arbitrum, Optimism, or Polygon.

## Known failure modes

- Invalid or non-existent contract address returns an error or null fields
- Unsupported network (not one of base, ethereum, arbitrum, optimism, polygon) returns a validation error
- Contract does not implement ERC-2981 royalty standard — royalty fields may be null
- Contract is not an NFT (ERC-721/1155) — may return incomplete or null metadata
- Network RPC timeout or chain congestion causes slow or failed response

## How this service works

558 pay-per-call data APIs for AI agents: Solana and EVM on-chain data, tokenized stocks, DeFi, Hyperliquid, economy and official statistics, FX, validation, web and developer tools. Pay in USDC via x402.

## Output

Returns a JSON object with the collection's name, ticker symbol, total supply (integer), contract address, blockchain network, token standard (ERC-721 or ERC-1155), and the contract owner's wallet address, all read directly from the on-chain contract.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "network": {
   "enum": [
    "base",
    "ethereum",
    "arbitrum",
    "optimism",
    "polygon"
   ],
   "type": "string"
  },
  "contract": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "name": "BoredApeYachtClub",
  "supply": 10000,
  "symbol": "BAYC",
  "network": "ethereum",
  "contract": "0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D",
  "standard": "ERC-721",
  "contract_owner": "0x0000000000000000000000000000000000000000"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vextorium-nft-collection-on-chain-profile-165696e4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)