x402basequality 0.35

Pay-per-request API platform on Base via x402 — data, AI, finance, and utility endpoints at $0.02/call.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/carts/92

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure/Utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request, paid in USDC on the Base network.

The specific endpoint `/api/v1/carts/92` is listed as "Premium API Access" and returns a valid x402 challenge with a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02. Payment is made via the x402 exact scheme — no API keys, subscriptions, or rate limits are required. The platform advertises instant access with no minimums or commitments.

Note that while the landing page lists many endpoints across multiple domains, the docs, pricing, and API pages all appear to be behind a wallet-connect gate and provide no additional technical documentation. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawl. The actual functionality behind each endpoint is unverified beyond the category labels on the homepage.

Capabilities

x402-paymentpay-per-requestusdc-basedata-analyticsai-sentimentai-summarizationai-classificationai-embeddingsfinance-pricesexchange-ratescrypto-gasgeocodingvalidationconversion

Use cases

  • —Agent-driven data retrieval without API key management
  • —On-demand AI inference (sentiment, summarization, classification, embeddings) at micro-payment scale
  • —Fetching real-time crypto gas estimates or token quotes via x402
  • —Geocoding or data conversion as a lightweight utility call
  • —Programmatic access to analytics metrics and reports

Fit

Best for

  • —AI agents needing keyless, pay-per-call API access
  • —Developers prototyping with low-cost, no-commitment endpoints
  • —Web3-native applications that can settle payments in USDC on Base

Not for

  • —High-volume production workloads needing SLAs or guaranteed uptime
  • —Users who need detailed API documentation or response schemas before integrating
  • —Applications requiring non-crypto payment methods

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/carts/92 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/carts/92
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 challenge, and the landing page lists many endpoints with consistent pricing. However, there is no OpenAPI spec, no request/response documentation, no examples, and the docs/pricing/API pages are all gated behind wallet-connect with no visible content. The actual functionality behind '/api/v1/carts/92' (labeled 'Premium API Access') is unclear and not documented.

Warnings

  • —No OpenAPI or schema documentation available — endpoint behavior is unverified
  • —Docs, pricing, and API pages are behind a wallet-connect gate with no public content
  • —The endpoint path '/api/v1/carts/92' does not appear in the homepage catalog, and 'Premium API Access' is a generic label with no description of what it returns
  • —No request body schema or response schema is documented anywhere

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 23:22:52Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/afVGwu
Pay-per-request API platform on Base via x402 — data, AI, finance, and utility endpoints at $0.02/call. — Clawmart · Clawmart