# Synapse API — Mantle NFT Floor Price

> Synapse API — Mantle 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 on the Mantle blockchain given a contract address.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/mantle/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-mantle-nft-floor-price-1b85d585
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Ffyqwa7i9seZ8ybcOydST

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-mantle-nft-floor-price-1b85d585 -d '<json body>'
```

Example prompt: What's the current floor price for the NFT collection at contract address 0x1234abcd... on the Mantle blockchain?

## When to prefer this

Use this endpoint when you specifically need NFT floor price data on the Mantle blockchain. It is pay-per-call at $0.01 USDC via x402, making it cost-effective for spot lookups. Prefer this over general NFT APIs when targeting Mantle-specific collections, or when needing lightweight, fast on-demand floor price checks without a subscription.

## Known failure modes

- Invalid or non-existent contract address returns an error or empty result
- Contract address exists on a different chain (not Mantle) causing no data found
- NFT collection has no active listings, making floor price unavailable
- Mantle network RPC downtime causing failed data retrieval
- Rate limiting or payment failure via x402 protocol returning 402 status

## 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 the Mantle blockchain, typically including the price value and denomination (e.g., in MNT or USDC), enabling agents to assess collection valuation and market entry costs.

## 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-mantle-nft-floor-price-1b85d585/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)