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/17/owner

What it does

This endpoint at lowpaymentfee.com returns NFT ownership information for NFT ID 17. It is part of a broader suite of x402-protocol APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints on the platform share a uniform pricing model of $0.02 per request, settled in USDC on the Base network.

The endpoint is live and responds with a standard x402 payment challenge (HTTP 402) requiring an X-PAYMENT header. Payment is made in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base) using the "exact" scheme. The maxAmountRequired is 20,000 base units, which at 6 decimals equals $0.02. No API keys or rate limits are advertised; access is gated purely by per-request micropayment.

The specific functionality of this endpoint — NFT owner lookup — is not documented in detail on the provider's landing page, which focuses on broader API categories. The endpoint path suggests it returns the current owner of a specific NFT (ID 17). No request body schema or response schema is documented, so the exact fields returned are unknown. The provider's site lists many endpoint categories but the NFT endpoints are not prominently featured among them, making this a less-documented offering.

Capabilities

nft-ownership-lookupx402-micropaymentusdc-paymentbase-networkper-request-billingno-api-key

Use cases

  • —Querying the current owner of a specific NFT programmatically
  • —Integrating NFT ownership checks into agent workflows without API key management
  • —Verifying NFT holder status before granting access or privileges

Fit

Best for

  • —Agents needing on-demand NFT ownership data with no subscription
  • —Developers prototyping NFT-aware applications with pay-per-call pricing
  • —Workflows requiring permissionless, key-free API access on Base

Not for

  • —Bulk querying ownership across many NFTs (no batch endpoint documented)
  • —Looking up arbitrary NFT IDs (this endpoint is hardcoded to NFT 17)
  • —Users who need detailed NFT metadata beyond ownership

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/nfts/17/owner \
  -H "X-PAYMENT: <x402-payment-token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/nfts/17/owner
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documented request/response schema, no OpenAPI spec, and the NFT endpoint is not mentioned on the provider's landing page. The actual data returned is entirely unknown, making this effectively a stub listing.

Warnings

  • —No request or response schema documented for this endpoint
  • —NFT endpoint not listed among the provider's advertised API categories — may be experimental or undocumented
  • —Endpoint is specific to NFT ID 17; unclear if other NFT IDs are supported via different paths
  • —No examples of successful responses available

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 23:24:48Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

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