# Synapse API — NFT Floor Price on Ink Chain

> Synapse API — NFT Floor Price on Ink Chain 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 2026-09-15).

Returns the current floor price for an NFT collection on the Ink blockchain network given a contract address.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/ink/nft/floor-price
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-nft-floor-price-on-ink-chain-80017a3e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xKwLoWyo-EFdcqgtOd5LL

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-nft-floor-price-on-ink-chain-80017a3e -d '<json body>'
```

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

## When to prefer this

Use this endpoint when you specifically need NFT floor price data on the Ink blockchain network. It is pay-per-call at $0.01 USDC via x402, making it cost-effective for one-off lookups. Prefer this over generic NFT marketplaces when you need programmatic, agent-accessible floor price data on Ink-native collections.

## Known failure modes

- Invalid or malformed contract address returns an error
- Contract address not found on Ink network returns no data or 404
- Collection has no active listings, resulting in null or zero floor price
- Network or RPC issues causing timeout or 503 response
- Payment failure via x402 protocol causing 402 response

## 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 contract on the Ink blockchain, likely including the price value and denomination/currency used for listings.

## 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-nft-floor-price-on-ink-chain-80017a3e/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)