NFT collection floor-price lookup via x402 micropayment on Base, $0.02 per request.
What it does
This endpoint at lowpaymentfee.com returns floor-price data for NFT collection ID 3. It is part of a broader suite of pay-per-call APIs offered by lowpaymentfee.com, all settled via the x402 protocol on the Base network using USDC. The specific resource path `/api/v1/collections/3/floor` suggests it serves NFT or digital-asset collection floor prices, though the provider's landing page categorizes its finance endpoints under "Finance & Web3" with price feeds, exchange rates, token quotes, and gas estimates.
Payment is handled inline: callers receive a 402 challenge specifying an exact-scheme USDC payment of up to 20,000 base units (i.e., $0.02 given USDC's 6 decimals) to the provider's address on Base. No API keys, subscriptions, or rate limits are advertised — each request is independently paid. The response MIME type is `application/json`.
Documentation is extremely thin. The landing page lists many endpoints at $0.02 each but provides no request/response schemas, parameter descriptions, or example payloads. The `/docs`, `/api`, `/pricing`, and `/README` pages all render only a "Connect wallet" prompt with no further content. Because of this, the exact request body format and response structure for the collections floor endpoint are unknown and must be discovered experimentally.
Capabilities
Use cases
- —Fetching the current floor price of a specific NFT collection for trading bots
- —Displaying real-time NFT collection valuations in dashboards
- —Automated portfolio tracking that needs on-demand floor price lookups
- —Agent-driven NFT arbitrage requiring per-call pricing data
Fit
Best for
- —Agents or bots needing on-demand NFT floor prices without API key management
- —Low-volume or sporadic callers who prefer pay-per-request over subscriptions
- —x402-native workflows on the Base network settling in USDC
Not for
- —High-frequency bulk data consumers who need websocket streams or flat-rate plans
- —Users who need detailed collection metadata, trait analysis, or historical charts
- —Anyone without a Base-network USDC wallet or x402-compatible client
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/collections/3/floor \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, no examples, and the specific collection (ID 3) is unidentified. Effectively a stub listing.
Warnings
- —No request or response schema available — callers must discover the API contract experimentally.
- —All documentation pages (/docs, /api, /pricing, /README) return only a 'Connect wallet' prompt with no useful content.
- —The specific NFT collection referenced by ID 3 is unidentified; it is unclear what collection's floor price is returned.
- —The landing page does not list this specific /collections/3/floor endpoint among its advertised APIs, so it may be undocumented or experimental.
Citations
- —The endpoint returns a 402 challenge requesting up to 20,000 base units of USDC (asset 0x8335…) on Base via x402 exact scheme.https://lowpaymentfee.com/api/v1/collections/3/floor
- —All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —USDC on Base uses 6 decimals, so 20,000 base units equals $0.02.https://lowpaymentfee.com