# Synapse API — WorldChain NFT Floor Price

> Synapse API — WorldChain 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 2026-09-14).

Returns the current floor price for an NFT collection deployed on the WorldChain blockchain given a contract address

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/worldchain/nft/floor-price
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-worldchain-nft-floor-price-6172bc58
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KuozEX-eDvL8PK66bMowG

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-worldchain-nft-floor-price-6172bc58 -d '<json body>'
```

Example prompt: What's the current floor price for the NFT collection at contract address 0xAbC123... on WorldChain?

## When to prefer this

Use this endpoint when you specifically need NFT floor price data on the WorldChain blockchain. It is purpose-built for WorldChain and is well-suited for agents monitoring NFT collection prices, evaluating entry costs, or comparing collections on that specific chain. Prefer this over generic multi-chain NFT APIs when your use case is exclusively WorldChain-based and you want a simple per-call pay-as-you-go model via USDC.

## Known failure modes

- Invalid or malformed contract address returns an error or empty result
- Contract address not found on WorldChain returns a not-found or null response
- Network or upstream data provider outage causes timeout or 5xx error
- Contract exists but has no active listings, resulting in null or zero floor price
- Payment failure via x402 protocol results in 402 response blocking the call

## 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 of the specified NFT collection on WorldChain, typically including the price value and currency denomination, representing the lowest listed price for any NFT in that collection.

## 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-worldchain-nft-floor-price-6172bc58/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)