# Synapse API — Unichain NFT Floor Price

> Synapse API — Unichain 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 2026-10-12).

Returns the current floor price for an NFT collection on the Unichain network given a contract address

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/unichain/nft/floor-price?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-unichain-nft-floor-price-864ff8cc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3EAoy_2oaDQHbsrptmPgj

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-unichain-nft-floor-price-864ff8cc -d '<json body>'
```

Example prompt: What's the current floor price for the NFT collection at contract address 0x1234...abcd on Unichain?

## When to prefer this

Use this endpoint when you specifically need NFT floor price data on the Unichain network. Prefer this over general NFT APIs when Unichain-specific data is required and you want pay-per-call pricing with no subscription overhead.

## Known failure modes

- Invalid or malformed contract address returns an error or empty result
- Contract address not found on Unichain returns not found or null floor price
- No active listings may result in a null or zero floor price
- Network or API timeout causes request failure
- Incorrect network — contract exists on a different chain but not Unichain

## 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 the Unichain network, typically including the price value and possibly the denomination or currency unit used.

## 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-unichain-nft-floor-price-864ff8cc/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)