# Beggar Bot NFT Owner Lookup (Base mainnet)

> Beggar Bot NFT Owner Lookup (Base mainnet) is a paid API for AI agents from beggar-bot-demand.beggarbot.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-11-04).

Looks up NFT ownership data for a given collection contract and optional token IDs or holder wallet address across multiple EVM chains

## Facts

- Endpoint: GET https://beggar-bot-demand.beggarbot.workers.dev/v1/nftowner?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-04
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/beggar-bot-nft-owner-lookup-base-mainnet-3979273d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tTedoUzzURpk4sSFTrX0H

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 beggar-bot-nft-owner-lookup-base-mainnet-3979273d
```

Example prompt: Can you check who owns token IDs 1, 5, and 12 from NFT collection 0x1234567890abcdef1234567890abcdef12345678 on Base, and tell me if wallet 0xABCDEF1234567890abcdef1234567890abcdef12 holds any of them?

## When to prefer this

Use this endpoint when you need on-chain NFT ownership data across Base, Ethereum, Optimism, Arbitrum, or Polygon — especially for token-gated access control, holder verification, or airdrop targeting. Prefer this over manual RPC calls when you need a simple REST API without managing blockchain node connections. Cost is $0.02 USDC per call via x402.

## Known failure modes

- Invalid or missing contract address returns error
- Unsupported chain name returns error
- Payment not received (x402 flow not completed) returns 402
- Token IDs not found in collection returns empty or not-found response
- Malformed CSV token IDs may cause parsing error

## How this service works

Paid: /v1/verify, /v1/risk, /v1/receipt cost $0.01 USDC per call on Base mainnet via x402 (payTo 0x719227f384b66BFEF00093D6d8d32fA9dC2B40e7); utilities analyze Base mainnet (USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) by default, network=base-sepolia optional; /v1/receipt/verify and discovery files are free. Operator: Beggar Bot.

## Output

Returns JSON with NFT ownership details for the requested contract, including owner wallet addresses for specified token IDs, and optionally confirms whether a given holder wallet owns tokens in the collection.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "ids": {
       "type": "string",
       "description": "csv token ids"
      },
      "chain": {
       "type": "string",
       "description": "base|ethereum|optimism|arbitrum|polygon"
      },
      "holder": {
       "type": "string",
       "description": "0x wallet (optional)"
      },
      "contract": {
       "type": "string",
       "description": "0x collection"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/beggar-bot-nft-owner-lookup-base-mainnet-3979273d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from beggar-bot-demand.beggarbot.workers.dev](https://www.zero.xyz/host/beggar-bot-demand.beggarbot.workers.dev/llms.txt)