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/91/owner

What it does

This endpoint at lowpaymentfee.com returns NFT ownership information for NFT ID 91. 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 endpoint accepts POST requests and returns JSON. Payment is handled inline via the X-PAYMENT header using the x402 exact scheme. The max amount required is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per call. There are no API keys, no rate limits, and no subscriptions — callers pay per request with USDC on Base. The payment recipient address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, and the payment timeout is 300 seconds.

The specific endpoint `/api/v1/nfts/91/owner` appears to be an NFT-related query not prominently listed on the site's landing page, which primarily advertises analytics, AI, finance, and utility endpoints. Documentation beyond the landing page is minimal — the /api, /pricing, and /README pages all resolve to a "Connect wallet" prompt with no additional content. No OpenAPI schema, request/response examples, or detailed docs were found.

Capabilities

nft-ownership-queryx402-micropaymentusdc-paymentbase-networkpay-per-requestno-api-keyjson-response

Use cases

  • —Querying the current owner of a specific NFT (ID 91) programmatically
  • —Integrating NFT ownership checks into agent workflows without API key management
  • —Paying per-call for on-demand NFT data using USDC on Base

Fit

Best for

  • —Agents or bots needing quick NFT ownership lookups without subscription overhead
  • —Developers prototyping x402-based payment flows
  • —Low-volume, on-demand NFT data queries

Not for

  • —Bulk or high-throughput NFT indexing (no batch endpoint documented)
  • —Users who need detailed NFT metadata, transfer history, or collection-level queries
  • —Anyone without USDC on Base for payment

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/nfts/91/owner \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/nfts/91/owner
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no request/response examples, and no documentation beyond a landing page. The specific NFT endpoint is not listed on the site. Effectively a stub listing.

Warnings

  • —No OpenAPI or detailed documentation available — /api, /pricing, and /README pages all return only a 'Connect wallet' prompt
  • —No request body schema or response schema documented; callers must guess at the expected input and output format
  • —This specific NFT endpoint (/api/v1/nfts/91/owner) is not listed among the advertised APIs on the landing page
  • —The endpoint is hardcoded to NFT ID 91; it is unclear whether other NFT IDs are queryable via similar paths

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 23:47:30Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/v46JVU
Query NFT ownership data via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart