# Synapse API — SEI NFT Floor Price

> Synapse API — SEI 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 2026-10-16).

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

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/sei/nft/floor-price?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-sei-nft-floor-price-f631bc0b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yLqQnUHPyk50mShALKUYl

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-sei-nft-floor-price-f631bc0b -d '<json body>'
```

Example prompt: What's the current floor price for the SEI NFT collection at contract address sei1abc123xyz456 on the SEI blockchain?

## When to prefer this

Use this endpoint when you specifically need floor price data for NFT collections on the SEI blockchain. It is purpose-built for SEI network NFT lookups and supports pay-per-call via x402 micropayments, making it suitable for agent workflows that need on-demand, low-cost NFT market data without a subscription. Prefer this over general NFT APIs when your target collection is on SEI and you want minimal overhead per query.

## Known failure modes

- Invalid or malformed contract address returns an error or empty result
- Contract address not found on SEI blockchain returns 404 or null floor price
- Collection has no active listings — floor price may be null or zero
- Network or upstream data provider outage causes timeout or 500 error
- Payment of $0.01 USDC not completed results in 402 Payment Required
- Rate limiting may occur under high request volume

## 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 SEI blockchain, typically including the price amount and denomination (e.g. native SEI token or USD equivalent). May also include marketplace source or last-updated timestamp depending on the implementation.

## 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-sei-nft-floor-price-f631bc0b/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)