x402basequality 0.35

NFT collection floor-price lookup via x402 micropayment on Base for $0.02/request

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/collections/50/floor

What it does

This endpoint at lowpaymentfee.com returns floor-price data for NFT collection ID 50. 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/50/floor` suggests it serves NFT or digital-asset collection floor prices, though the provider's landing page categorizes its offerings under Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure.

Payment is handled inline: callers send an `X-PAYMENT` header containing a signed x402 payment voucher. The x402 challenge confirms the endpoint is live (HTTP 402 returned) and accepts USDC on Base (contract 0x8335…2913) with a max amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The payment recipient address is 0x1A2B…85F3. No API keys or rate limits are advertised; access is purely pay-per-request.

Documentation is extremely thin — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema, and no example payloads available. The endpoint accepts POST requests based on the outputSchema in the x402 challenge. Because the actual response format is undocumented, consumers should expect a JSON response (mimeType is `application/json`) but will need to experiment to determine the exact schema.

Capabilities

nft-floor-pricex402-paymentusdc-basepay-per-requestcollection-datajson-api

Use cases

  • —Querying the current floor price of a specific NFT collection programmatically
  • —Building trading bots or dashboards that need real-time NFT floor data
  • —Agents that compare floor prices across collections before making purchase decisions

Fit

Best for

  • —Developers needing on-demand NFT floor prices without API key management
  • —AI agents with x402-compatible wallets on Base
  • —Low-volume or sporadic queries where $0.02/call is cost-effective

Not for

  • —High-frequency bulk data ingestion (no documented batch endpoint or subscription)
  • —Users who need detailed collection metadata, trait-level pricing, or historical charts

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/collections/50/floor \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_signed_voucher>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/collections/50/floor
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no examples. The endpoint's actual behavior and response format are entirely undocumented.

Warnings

  • —No OpenAPI or schema documentation available — response format is unknown
  • —Docs, pricing, and API pages all render only 'Connect wallet' with no technical content
  • —The specific endpoint path (/collections/50/floor) is not listed on the provider's landing page; its purpose is inferred from the URL pattern
  • —No examples of request body or response body could be found

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 18:00:20Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-19
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/4ehvVG
NFT collection floor-price lookup via x402 micropayment on Base for $0.02/request — Clawmart · Clawmart