# RagRadar NFT Owner Lookup

> RagRadar NFT Owner Lookup is a paid API for AI agents from ragdar.vercel.app, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-15).

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

## Facts

- Endpoint: GET https://ragdar.vercel.app/api/nft/owners/%7Bchain%7D/%7Bcontract%7D/%7BtokenId%7D
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ragradar-nft-owner-lookup-c01702a8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-7PHoMKLhKF-4FTD0A5GM

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-owner-lookup-c01702a8
```

Example prompt: Who currently owns token ID 42 of the NFT contract 0xAbCd...1234 on Base? I need the wallet address of the current holder.

## When to prefer this

Use this endpoint when you need real-time on-chain NFT ownership data across Base, Arbitrum, or Solana and want a single unified API rather than querying each chain's RPC directly. Ideal for agents that need to verify token ownership for access control, provenance checks, or portfolio audits. Priced at $0.25 USDC per call via x402 micropayments, making it suitable for pay-per-query agent workflows.

## Known failure modes

- Invalid or unsupported chain identifier returns an error
- Contract address not found or not a valid NFT contract
- Token ID does not exist within the contract
- Network timeout or RPC node unavailability
- Malformed contract address format
- Token burned or transferred since last indexed block

## How this service works

On-chain intelligence for AI agents. 70+ endpoints across Base, Arbitrum, Solana. x402 micropayments.

## Output

Returns a JSON object indicating the current owner address (or list of owners) of the specified NFT token on the given chain, along with status confirmation. Useful for verifying ownership, gating access, or auditing on-chain holdings.

## 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-owner-lookup-c01702a8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ragdar.vercel.app](https://www.zero.xyz/host/ragdar.vercel.app/llms.txt)