# Synapse API — BNB NFT Floor Price

> Synapse API — BNB NFT Floor Price is a paid API for AI agents from synapse-api-brown.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-13).

Returns the current floor price for an NFT collection on the BNB (Binance Smart Chain) network given a contract address.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/bnb/nft/floor-price?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-bnb-nft-floor-price-f93b8d63
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_plinODOFadHGU0a_pzmL8

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 synapse-api-bnb-nft-floor-price-f93b8d63 -d '<json body>'
```

Example prompt: What's the current floor price for the NFT collection at contract address 0xABC123... on BNB Chain?

## When to prefer this

Use this endpoint when you need real-time or near-real-time NFT floor price data specifically on the BNB (Binance Smart Chain) network. Prefer it over general NFT marketplaces when building automated agents or bots that need programmatic, pay-per-call access to floor price data without API key management overhead.

## Known failure modes

- Invalid or malformed contract address returns an error
- Contract address does not correspond to an NFT collection on BNB Chain
- Collection has no active listings, making floor price unavailable
- Network or upstream data provider outage causing timeout or empty response
- Payment failure via x402 protocol blocks the request

## How this service works

High-speed API suite for AI processing, web scraping, and smart data utilities across 57+ blockchain networks. Pay-per-call via x402.

## Output

Returns the current floor price for the specified NFT collection on BNB Chain, typically including the floor price value and denomination (e.g., in BNB or USD).

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synapse-api-bnb-nft-floor-price-f93b8d63/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from synapse-api-brown.vercel.app](https://www.zero.xyz/host/synapse-api-brown.vercel.app/llms.txt)