# Synapse API — Polygon NFT Floor Price

> Synapse API — Polygon 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 2026-09-13).

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

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/polygon/nft/floor-price
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-polygon-nft-floor-price-e9d107dc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7hP2hvRvYIsdj-_Y5YaT4

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-polygon-nft-floor-price-e9d107dc -d '<json body>'
```

Example prompt: What's the current floor price for the Polygon NFT collection at contract address 0x2953399124F0cBB46d2CbACD8A89cF0599974963?

## When to prefer this

Use this endpoint when you need a quick, pay-per-call floor price lookup for a specific Polygon NFT contract without committing to a subscription-based NFT data provider. Ideal for lightweight agents, one-off queries, or portfolio tools that need Polygon-specific NFT pricing on demand.

## Known failure modes

- Invalid or malformed contract address returns an error or empty result
- Contract address is not an NFT contract on Polygon — may return null or error
- Collection has no active listings, resulting in no floor price available
- Rate limiting or service unavailability returns a 5xx error
- Stale data if the underlying data source has not indexed recent sales

## 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 Polygon NFT collection, typically including the price value in the native token (MATIC/POL) or USD, sourced from on-chain or aggregated marketplace data.

## 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-polygon-nft-floor-price-e9d107dc/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)