x402basequality 0.35

Pay-per-call API platform on Base network via x402 — $0.02/request in USDC, no API keys required.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/products/68

What it does

lowpaymentfee.com is an x402-enabled API marketplace that offers a variety of endpoints across data & analytics, AI & machine learning, finance & Web3, and infrastructure/utility categories. All endpoints are priced at $0.02 per request, paid in USDC on the Base network. The platform requires no API keys, no rate limits, and no upfront commitments — callers simply attach an x402 payment header to each request.

The specific endpoint at `/api/v1/products/68` is listed as "Premium API Access" and returns `application/json`. The x402 challenge confirms it is live, accepting POST requests with an exact-scheme payment of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.

The broader platform advertises additional endpoints including sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation utilities — all at the same $0.02 price point. However, documentation pages (docs, pricing, README) returned only a "Connect wallet" prompt with no substantive content, so the actual input/output schemas and detailed behavior of each endpoint remain undocumented.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyjson-responsepost-method

Use cases

  • —Agents needing on-demand API access without pre-registration or API key management
  • —Programmatic access to utility endpoints (geocoding, validation, conversion) with per-call billing
  • —Testing x402 payment flows on Base network at low cost

Fit

Best for

  • —Developers or agents wanting zero-setup, pay-as-you-go API access
  • —x402-compatible wallets and agent frameworks on Base
  • —Low-volume or sporadic API consumers who don't want subscriptions

Not for

  • —High-volume production workloads where $0.02/request adds up significantly
  • —Users who need detailed API documentation and guaranteed SLAs
  • —Consumers without a Base-network USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/products/68 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/68
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing. However, there is no OpenAPI schema, no documentation of request/response formats, and the docs/pricing/README pages are all empty ('Connect wallet' only). The purpose of '/api/v1/products/68' specifically is unclear beyond the generic 'Premium API Access' label. Effectively a stub listing.

Warnings

  • —No documentation available — docs, pricing, and README pages all return only 'Connect wallet' with no content
  • —The specific purpose and input/output schema of /api/v1/products/68 is unknown; 'Premium API Access' is a generic label
  • —No OpenAPI spec or example responses are provided by the platform
  • —Cannot verify what data or functionality any of the advertised endpoints actually return

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 20:05:52Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/tZEwLB
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC, no API keys required. — Clawmart · Clawmart