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/46/owner

What it does

This endpoint at lowpaymentfee.com returns NFT ownership information for NFT #46. It is part of a broader suite of x402-protocol pay-per-call APIs hosted on the same domain, spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints on the platform share a uniform $0.02 per-request pricing model settled in USDC on the Base network.

The specific endpoint `/api/v1/nfts/46/owner` accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers must include an X-PAYMENT header with a valid payment proof. The x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimal places. No API keys or rate limits are advertised; access is gated purely by micropayment.

Documentation is minimal — the provider's landing page lists available endpoints and pricing but does not provide request/response schemas, parameter descriptions, or example payloads for this specific NFT endpoint. The endpoint is live and returns a proper 402 challenge, confirming it is operational.

Capabilities

nft-ownership-lookupx402-micropaymentusdc-paymentbase-networkpay-per-requestno-api-key

Use cases

  • —Querying the current owner of a specific NFT programmatically
  • —Building NFT portfolio dashboards that need on-demand ownership checks
  • —Agent workflows that verify NFT ownership before executing downstream logic

Fit

Best for

  • —Developers needing simple pay-per-call NFT ownership data without API key management
  • —AI agents that can settle x402 micropayments on Base
  • —Low-volume or sporadic NFT ownership queries where subscription pricing is wasteful

Not for

  • —Bulk enumeration of all NFT owners across a collection (single-NFT endpoint, no batch support evident)
  • —Users who cannot settle USDC payments on the Base network
  • —Applications requiring detailed NFT metadata beyond ownership

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/nfts/46/owner \
  -H "X-PAYMENT: <x402-payment-proof>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/nfts/46/owner
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, there is no OpenAPI schema, no request/response examples, and no documentation beyond a landing page listing. The specific functionality (NFT #46 owner) is narrow and undocumented, making this effectively a stub listing.

Warnings

  • —No request or response schema available — input parameters and output format are unknown.
  • —Endpoint is hardcoded to NFT #46; unclear if other NFT IDs are supported via similar paths.
  • —No documentation beyond the landing page; /api, /pricing, and /README pages all just show 'Connect wallet'.
  • —The broader platform lists many API categories (AI, finance, infrastructure) but none appear to be documented in detail.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 23:33:33Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/gqRN3r
Query NFT ownership data via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart