# TC AI Premium NFT Balance Checker

> TC AI Premium NFT Balance Checker is a paid API for AI agents from tc-ai-premium.vercel.app, paid per call via x402, $0.5/call, status unknown (last checked 2026-10-18).

Returns the premium NFT balance for a given wallet address on supported blockchain networks (Base, Sei, Avalanche, Polygon)

## Facts

- Endpoint: POST https://tc-ai-premium.vercel.app/api/x402/nft-premium?utm_source=zero.xyz
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tc-ai-premium-nft-balance-checker-c5c828dc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7Dclt3U7nZz1YYwYRvYqS

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 tc-ai-premium-nft-balance-checker-c5c828dc -d '<json body>'
```

Example prompt: Can you check whether my wallet address 0xAbC123...456 has any premium NFTs on the Base chain using the base facilitator?

## When to prefer this

Use this endpoint when an agent needs to verify whether a wallet address holds premium NFT access on a specific supported chain (Base, Sei, Avalanche, Polygon). Prefer this over generic NFT balance APIs when the use case is specifically checking premium access gating via NFT ownership in the TC AI ecosystem, especially when working with x402 payment-gated APIs and needing to confirm user tier/entitlement.

## Known failure modes

- Invalid or unsupported chain returns an error — only base, sei, avalanche, and polygon are supported
- Unsupported facilitator type causes failure — only base, payAI, and daydreams are valid
- Invalid wallet address format results in lookup failure
- Chain-facilitator mismatch (e.g. sei chain with base facilitator) may return an error or empty result
- Payment of $0.50 USDC not completed causes request to be rejected by x402 protocol
- No NFTs found returns a zero balance rather than an error

## How this service works

Get your NFT balance premium on base chain for user premium

## Output

Returns the premium NFT balance associated with the queried wallet address on the specified blockchain, indicating how many premium NFTs the address holds and thus whether it has premium access.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "chain": {
   "type": "string",
   "description": "List chain support: [base, sei, avalanche, polygon]. Default is chain base.\n Facilitator base support chain: base. \n Facilitator payAI support chain: base, sei, avalanche, polygon. \n Facilitator daydreams support chain: base, polygon "
  },
  "address": {
   "type": "string",
   "description": "Your address to search data. \nDefault is the payment address."
  },
  "facilitator": {
   "type": "string",
   "description": "The facilitator type.\n List support [base, payAI, daydreams]"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tc-ai-premium-nft-balance-checker-c5c828dc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tc-ai-premium.vercel.app](https://www.zero.xyz/host/tc-ai-premium.vercel.app/llms.txt)