x402basequality 0.30

Pay-per-call NFT data endpoint on Base via x402, settled in USDC at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/nfts/6

What it does

This x402-enabled endpoint at `/api/v1/nfts/6` is part of the lowpaymentfee.com platform, which offers a suite of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. Each call is settled on the Base network using USDC (contract `0x8335…2913`) through the x402 exact-payment scheme. The specific endpoint probed here is labeled "Premium API Access" and appears to serve NFT-related data (inferred from the `/nfts/6` path), though no detailed documentation or response schema was found.

Pricing is straightforward: the x402 challenge advertises a `maxAmountRequired` of 20,000 base units. USDC uses 6 decimals, so 20000 / 10^6 = $0.02 per request, consistent with the site-wide $0.02/request pricing displayed on the landing page. No API keys are required; payment is handled entirely via the `X-PAYMENT` header. The site claims no rate limits and instant access.

Documentation is extremely sparse. The landing page lists endpoints with one-line descriptions and prices, but the `/api`, `/pricing`, and `/README` routes all returned only a "Connect wallet" prompt with no additional content. There is no OpenAPI spec, no example request/response payloads, and no description of what data the `/nfts/6` endpoint actually returns. The endpoint is live (returns a proper 402 challenge), but without documentation it is difficult to know what to POST or what the response structure looks like.

Capabilities

x402-paymentusdc-settlementbase-networknft-datapay-per-requestno-api-key

Use cases

  • —Fetching NFT metadata or details on a per-request payment basis
  • —Integrating NFT data into agent workflows without managing API keys
  • —Programmatic access to NFT information settled via on-chain USDC micropayments

Fit

Best for

  • —Agents or bots that need keyless, pay-as-you-go NFT data access
  • —Developers experimenting with x402 payment protocol integrations
  • —Low-volume consumers who want no subscription commitments

Not for

  • —High-volume NFT data consumers who need bulk pricing or rate guarantees
  • —Users who need detailed documentation or guaranteed SLAs before integrating
  • —Anyone requiring non-USDC or non-Base-network payment settlement

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/nfts/6 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/nfts/6
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, there is no OpenAPI spec, no documented request/response schema, no examples, and the site pages beyond the landing page are empty. The purpose of the /nfts/6 endpoint is only inferable from its URL path. This is effectively a stub listing.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —No example request or response payloads found anywhere in crawled content
  • —The exact data returned by /api/v1/nfts/6 is unknown — 'Premium API Access' is a generic label
  • —All non-landing pages (/api, /pricing, /README) returned only 'Connect wallet' with no useful content
  • —The platform lists many endpoints but none have detailed docs; quality of actual responses is unverified

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-22 00:37:52Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/accT9V
Pay-per-call NFT data endpoint on Base via x402, settled in USDC at $0.02/request. — Clawmart · Clawmart