NFT collection floor-price data 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 9. 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 endpoint path `/api/v1/collections/9/floor` suggests it serves NFT or digital-asset collection floor-price information, though the provider's landing page categorizes its offerings broadly under Data & Analytics, AI & ML, Finance & Web3, and Infrastructure.
Payment is handled inline: callers send an `X-PAYMENT` header containing a signed x402 payment envelope. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. There are no API keys, no rate limits, and no subscription commitments — each call is independently settled on-chain. The payment recipient address is `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, and the USDC contract used is `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base mainnet.
Documentation is extremely sparse. The crawled docs, pricing, and API pages all returned only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no example responses, and no detailed description of the response format beyond the stated MIME type of `application/json`. The endpoint is confirmed live (returns a proper 402 challenge), but the actual data quality and response structure are unknown.
Capabilities
Use cases
- —Querying real-time floor prices for NFT collections programmatically
- —Building trading bots or dashboards that need on-demand NFT pricing
- —Agent-driven portfolio valuation that requires per-call NFT floor data
Fit
Best for
- —Developers needing low-cost, keyless NFT floor-price lookups
- —AI agents that can settle x402 payments autonomously on Base
- —Applications requiring pay-as-you-go pricing with no subscription overhead
Not for
- —Users who need bulk historical NFT floor-price data (no batch endpoint documented)
- —Applications that cannot settle USDC payments on the Base network
- —Users requiring detailed documentation or SLA guarantees before integration
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/collections/9/floor \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <signed-x402-envelope>"Endpoint
Quality
The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no documented response format, no example responses, and the crawled documentation pages are empty. The specific purpose (NFT collection floor price) is inferred from the URL path only.
Warnings
- —No OpenAPI or response schema available — response format is unknown
- —Documentation pages (/docs, /api, /pricing, /README) all returned only 'Connect wallet' with no content
- —The endpoint path suggests NFT collection data but this is inferred from the URL; no provider documentation confirms it
- —No SLA, rate-limit, or uptime guarantees documented
Citations
- —Endpoint returns 402 with x402 challenge requiring USDC payment on Basehttps://lowpaymentfee.com/api/v1/collections/9/floor
- —maxAmountRequired is 20000 base units of USDC (USD Coin, 6 decimals) = $0.02https://lowpaymentfee.com/api/v1/collections/9/floor
- —Provider advertises $0.02/request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/collections/9/floor