# 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 2026-10-16).

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

## Facts

- Endpoint: POST https://api.vextorium.com/nft-coleccion-pago?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vextorium-nft-collection-on-chain-profile-9f1b2db4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_h3kHVzhi_7Cxld1mdDtuK

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-9f1b2db4 -d '<json body>'
```

Example prompt: What are the on-chain details for the Bored Ape Yacht Club NFT collection at contract 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D on Ethereum — I want to know the name, symbol, total supply, owner, and whether it uses ERC-721 or ERC-1155?

## When to prefer this

Use this endpoint when you need authoritative on-chain NFT collection data (name, supply, owner, royalties, standard) read directly from the smart contract rather than from a third-party indexer or marketplace API. Ideal when verifying contract authenticity, auditing royalty settings, or enriching NFT listings across Base, Ethereum, Arbitrum, Optimism, or Polygon.

## Known failure modes

- Invalid or non-existent contract address returns an error or null fields
- Contract on unsupported network returns validation error
- Contract that is not an NFT collection (e.g. ERC-20) may return null or partial data
- Network congestion may cause slow or failed on-chain reads
- Missing 'contrato' field returns a schema validation error

## How this service works

On-chain profile of an NFT collection (ERC-721/1155): name, symbol, total supply, contract owner/admin, royalties (ERC-2981) and standard, read directly from the contract on Base, Ethereum, Arbitrum, Optimism or Polygon.

## Output

Returns a JSON object with the NFT collection's name, token symbol, contract address, blockchain network, NFT standard (ERC-721 or ERC-1155), total token supply, and the contract owner/admin wallet address. Royalty information per ERC-2981 may also be included where available.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "red": "ethereum",
  "nombre": "BoredApeYachtClub",
  "simbolo": "BAYC",
  "contrato": "0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D",
  "estandar": "ERC-721",
  "suministro": 10000,
  "propietario_contrato": "0x0000000000000000000000000000000000000000"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vextorium-nft-collection-on-chain-profile-9f1b2db4/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)