x402basequality 0.35

Query NFT ownership data via x402 micropayment on Base for $0.02 per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/nfts/11/owner

What it does

This endpoint at lowpaymentfee.com returns NFT ownership information for a specific NFT (ID 11) via a POST request. It is part of a broader platform offering pay-per-call APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories — all settled on the Base network using USDC through the x402 protocol.

The x402 challenge confirms the endpoint is live and accepts exact-scheme payments on Base. The maximum amount required is 20,000 base units of USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), which equals $0.02 per request (USDC uses 6 decimals). No API keys or rate limits are advertised; callers simply attach an X-PAYMENT header with a valid x402 payment proof. The response MIME type is application/json.

Documentation is minimal — the site's landing page lists available endpoints and pricing but provides no request/response schema details, parameter descriptions, or example payloads for this specific NFT owner endpoint. The endpoint path suggests it returns the owner address or identity for NFT token ID 11, but the exact response shape is not documented. The platform advertises a uniform $0.02 price across all endpoints, instant access, and no commitments.

Capabilities

nft-ownership-queryx402-micropaymentusdc-paymentbase-networkpay-per-requestno-api-key

Use cases

  • —Querying the current owner of a specific NFT programmatically
  • —Verifying NFT ownership as part of a gating or access-control workflow
  • —Building dashboards that display NFT holder information

Fit

Best for

  • —Agents or apps needing on-demand NFT ownership data without managing API keys
  • —Developers who want to pay per call with USDC on Base
  • —Lightweight integrations where subscription-free access is preferred

Not for

  • —Bulk or batch NFT ownership queries across many token IDs (only token 11 is addressed by this endpoint)
  • —Users who need detailed NFT metadata beyond ownership
  • —Applications requiring free or fiat-settled API access

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/nfts/11/owner \
  -H "X-PAYMENT: <x402_payment_proof>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/nfts/11/owner
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 schema, no documented request parameters, no example responses, and no description of what the NFT owner endpoint actually returns. The listing is effectively a stub with confirmed liveness.

Warnings

  • —No request or response schema documented for this endpoint
  • —No example payloads available — response structure is unknown
  • —Only NFT ID 11 is addressed; unclear if other IDs are supported via different paths
  • —Landing page shows many endpoints but none have detailed docs beyond a title and price

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 23:21:10Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/gxwb77
Query NFT ownership data via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart