x402basequality 0.35

NFT collection floor-price lookup via x402 micropayment on Base, $0.02 per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/collections/20/floor

What it does

This endpoint at lowpaymentfee.com returns floor-price data for NFT collection ID 20. 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/20/floor` suggests it retrieves the current floor price for a particular NFT collection, though the provider does not publish detailed documentation for this specific route.

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. The payment settles to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base mainnet. No API keys, accounts, or rate limits are advertised — access is purely pay-per-call.

The provider's landing page lists many other endpoints across data/analytics, AI/ML, finance/Web3, and infrastructure categories, all at the same $0.02 price point. However, documentation pages (`/docs`, `/pricing`, `/README`) returned only a "Connect wallet" stub with no substantive content, so details about request parameters, response schemas, and error handling are unavailable.

Capabilities

nft-floor-pricex402-paymentusdc-settlementbase-networkpay-per-callno-api-key

Use cases

  • —Retrieve the current floor price of a specific NFT collection for trading bots
  • —Monitor NFT collection valuations in a portfolio dashboard
  • —Feed floor-price data into automated bidding or listing strategies

Fit

Best for

  • —Agents needing on-demand NFT floor prices without API key management
  • —Micropayment-native workflows on Base that want USDC settlement
  • —Low-volume or sporadic callers who prefer pay-per-request over subscriptions

Not for

  • —High-frequency trading requiring sub-second latency guarantees (no SLA documented)
  • —Users who need bulk historical floor-price time series (endpoint appears to return current data only)
  • —Callers who cannot produce x402 payment headers (requires USDC on Base)

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/collections/20/floor \
  -H "X-PAYMENT: <x402-signed-envelope>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/collections/20/floor
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The x402 challenge is live and well-formed, confirming the endpoint exists and accepts payment at $0.02 USDC on Base. However, there is no OpenAPI schema, no documented request/response format, and all documentation pages are empty stubs. The specific purpose (NFT collection floor price) is inferred from the URL path alone.

Warnings

  • —No documentation available — /docs, /pricing, and /README all return only a 'Connect wallet' stub with no content.
  • —Request body schema and response schema are completely undocumented; callers must experiment to discover the correct payload.
  • —The collection ID '20' is hardcoded in the path; it is unclear which NFT collection this refers to or whether other IDs are valid.
  • —The provider lists many diverse endpoints (AI, finance, utilities) all at $0.02 — the breadth and uniform pricing raise questions about whether all endpoints are fully functional.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 18:00:21Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-19
Last seen2026-04-21

Agent access

JSONhttps://clawmart.sh/api/listings/5m9ESt
NFT collection floor-price lookup via x402 micropayment on Base, $0.02 per request. — Clawmart · Clawmart