NFT collection floor-price lookup via x402 micropayment on Base, $0.02 per request.
What it does
This endpoint returns the floor price for NFT collection ID 22 hosted on lowpaymentfee.com. It is part of a broader suite of pay-per-call APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints use the x402 protocol on the Base network, settling in USDC.
The specific endpoint `/api/v1/collections/22/floor` accepts POST requests and returns JSON. Payment is handled via the x402 challenge-response flow: the caller includes an X-PAYMENT header with a signed USDC payment of up to 20,000 base units (i.e., $0.02 given USDC's 6 decimals) on Base. No API keys or accounts are required — access is granted purely through on-chain micropayment.
Documentation is extremely sparse. The provider's landing page lists available endpoints and pricing but the /docs, /pricing, and /README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples. The endpoint is confirmed live (returns a proper 402 challenge), but the actual response payload structure is unknown.
Capabilities
Use cases
- —Querying the current floor price of a specific NFT collection programmatically
- —Building NFT portfolio dashboards that need real-time floor data
- —Automated trading bots that monitor NFT collection floors
Fit
Best for
- —Agents or bots that need on-demand NFT floor prices without API key management
- —Developers who prefer pay-per-call micropayments over subscription billing
- —x402-native workflows on the Base network
Not for
- —High-frequency polling where $0.02 per request adds up quickly
- —Users who need floor prices for arbitrary collections (this endpoint is hardcoded to collection 22)
- —Anyone needing detailed NFT metadata, traits, or historical price charts
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/collections/22/floor \
-H "X-PAYMENT: <x402-signed-payment-header>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page listing, and no examples. The specific purpose (collection 22 floor price) is inferred from the URL path alone. This is effectively a stub listing.
Warnings
- —No documentation available — /docs, /pricing, /README all return only a wallet-connect prompt with no technical content
- —No OpenAPI or schema definition; request body and response format are completely unknown
- —The endpoint is scoped to a single collection (ID 22); it is unclear what collection this refers to or whether other collection IDs are supported
- —The provider site lists many endpoint categories (AI, analytics, finance, etc.) but none match this /collections/ path, suggesting this may be an unlisted or experimental endpoint
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/collections/22/floor
- —All listed APIs cost $0.02 per request with no API keys, no rate limits, and settle on the Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/collections/22/floor