x402basequality 0.30

x402-gated NFT data endpoint on Base, pay $0.02 per request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/nfts/20

What it does

This endpoint at `/api/v1/nfts/20` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. The specific endpoint appears to serve NFT-related data (inferred from the URL path `/nfts/20`), though no detailed documentation or response schema is available beyond the generic "Premium API Access" label.

Payment is handled via the x402 protocol on the Base network. The challenge advertises a maximum cost of 20,000 base units of USDC (contract `0x8335…2913`), which at 6 decimals equals $0.02 per request. No API keys or account registration are required — callers simply attach an `X-PAYMENT` header with a valid x402 payment proof. The endpoint accepts POST requests and returns `application/json`.

The broader lowpaymentfee.com platform lists roughly 16 endpoints across four categories (Data & Analytics, AI & ML, Finance & Web3, Infrastructure), all priced uniformly at $0.02 per request. No rate limits or minimum commitments are advertised. However, documentation is extremely sparse: there is no OpenAPI spec, no request/response schema, and no usage examples. The `/api`, `/pricing`, and `/README` pages all resolve to a minimal "Connect wallet" prompt with no additional content.

Capabilities

x402-paymentusdc-settlementbase-networknft-datapay-per-requestno-api-keyjson-response

Use cases

  • —Fetching NFT metadata or details by ID via a single paid API call
  • —Integrating NFT data lookups into agent workflows without managing API keys
  • —Programmatic access to NFT information settled in USDC on Base

Fit

Best for

  • —Developers wanting keyless, pay-per-call NFT data access
  • —AI agents that can settle x402 payments on Base
  • —Prototyping NFT-aware applications without subscription commitments

Not for

  • —High-volume NFT data ingestion where per-call costs add up quickly
  • —Users who need detailed documentation, SDKs, or guaranteed SLAs
  • —Anyone requiring non-USDC or non-Base payment rails

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/nfts/20 \
  -H "X-PAYMENT: <x402-payment-proof>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/nfts/20
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a generic label, and no examples. The actual data returned by this NFT endpoint is entirely unknown, making it effectively a stub listing.

Warnings

  • —No OpenAPI or schema documentation available — request body and response format are unknown.
  • —The endpoint description is generic ('Premium API Access') and does not describe what NFT data is returned.
  • —All documentation pages (/api, /pricing, /README) resolve to a minimal 'Connect wallet' page with no useful content.
  • —The NFT-specific functionality is inferred solely from the URL path; no confirmation of actual behavior exists.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 23:31:27Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/u5mG4K
x402-gated NFT data endpoint on Base, pay $0.02 per request in USDC. — Clawmart · Clawmart