# RagRadar NFT Token Owners Lookup

> RagRadar NFT Token Owners Lookup is a paid API for AI agents from backup.ragradar.space, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-14).

Returns the owner(s) of a specific NFT token by chain, contract address, and token ID

## Facts

- Endpoint: GET https://backup.ragradar.space/api/nft/owners/%7Bchain%7D/%7Bcontract%7D/%7BtokenId%7D
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ragradar-nft-token-owners-lookup-45042589
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5uIGIOmqZ10vVFUbdfToH

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 ragradar-nft-token-owners-lookup-45042589
```

Example prompt: Who currently owns token #42 from the NFT contract 0xAbC123... on Base? Look it up on RagRadar and tell me the wallet address.

## When to prefer this

Use this endpoint when you need to identify the current on-chain owner of a specific NFT token by its contract address and token ID across Base, Arbitrum, or Solana. Prefer this over generic blockchain RPC calls when you want a simple REST API abstraction with x402 micropayment support and no need to manage node infrastructure.

## Known failure modes

- Invalid chain identifier returns error or empty result
- Non-existent contract address returns 404 or empty owners list
- Token ID not yet minted returns empty or error response
- Network connectivity issues to backup domain may cause timeouts
- Unparseable contract address format returns validation error
- Payment failure via x402 micropayment returns 402 status

## How this service works

On-chain intelligence for AI agents. 73+ endpoints across Base, Arbitrum, Solana. x402 micropayments.

## Output

A JSON object containing ownership information for the specified NFT token, including the current owner's wallet address and related on-chain data for the given chain, contract, and token ID.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "status": "ok"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ragradar-nft-token-owners-lookup-45042589/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from backup.ragradar.space](https://www.zero.xyz/host/backup.ragradar.space/llms.txt)