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/79/owner

What it does

This endpoint at lowpaymentfee.com returns NFT ownership information for NFT #79. It is part of a broader platform offering pay-per-call APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories — all settled via the x402 protocol on the Base network using USDC.

The specific endpoint `/api/v1/nfts/79/owner` accepts POST requests and is gated by an x402 payment challenge. The maximum amount required is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request. Payment is made via the `exact` scheme with a 300-second timeout. No API keys or rate limits are advertised; access is granted purely through on-chain micropayment.

The platform advertises a uniform $0.02/request pricing model across all its endpoints. Documentation beyond the landing page is sparse — the /api, /pricing, and /README pages all resolve to a wallet-connect prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled material. The endpoint is confirmed live (402 challenge captured), but the actual response format for a paid request is unknown.

Capabilities

nft-ownership-queryx402-micropaymentusdc-paymentbase-networkpay-per-request

Use cases

  • —Looking up the current owner of a specific NFT programmatically
  • —Integrating NFT ownership checks into agent workflows without API keys
  • —Verifying NFT provenance or holder status in automated pipelines

Fit

Best for

  • —Agents needing quick NFT ownership lookups with no signup
  • —Developers prototyping x402 payment flows on Base
  • —Applications requiring on-demand NFT data without subscription commitments

Not for

  • —Bulk or batch NFT ownership queries across large collections (no documented batch endpoint)
  • —Users who need detailed NFT metadata beyond ownership
  • —Applications requiring free or subscription-based access

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/nfts/79/owner \
  -H "X-PAYMENT: <x402_payment_token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/nfts/79/owner
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is confirmed live with a valid x402 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request body schema, no response examples, and the /api, /pricing, and /README pages are all empty wallet-connect prompts. The actual data returned by a paid call is unknown.

Warnings

  • —No OpenAPI or schema documentation available — request and response formats are unknown
  • —The /api, /pricing, and /README pages contain no useful content beyond a wallet-connect prompt
  • —The endpoint path suggests a hardcoded NFT ID (79); it is unclear whether other NFT IDs are supported or how to discover them
  • —No examples of successful (paid) responses are available

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-22 00:40:02Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/cZQ2Gh
Query NFT ownership data via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart