x402basequality 0.35

Pay-per-request API suite 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/1

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad collection of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and general utility services. Every endpoint is priced at $0.02 per request, paid in USDC on the Base network with no API keys, rate limits, or upfront commitments required.

The specific endpoint at `/api/v1/carts/1` is listed as "Premium API Access" and accepts POST requests. Its x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the x402 exact scheme, settling to the provider's wallet on Base.

The platform advertises four endpoint 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). Documentation pages exist at /docs, /pricing, and /api but currently render only a "Connect wallet" prompt with no substantive content, so the actual request/response schemas for individual endpoints are unknown.

Capabilities

x402-paymentpay-per-requestusdc-basedata-analyticsai-inferencesentiment-analysistext-summarizationclassificationembeddingsfinance-datacrypto-quotesgas-estimatesgeocodingvalidationconversion

Use cases

  • —Agents that need on-demand AI inference (sentiment, summarization, classification, embeddings) without managing API keys
  • —Fetching real-time crypto token quotes and gas estimates for DeFi workflows
  • —Running geocoding or data validation as part of an automated pipeline with per-call billing
  • —Exporting analytics data or generating reports via a simple pay-per-request model
  • —Prototyping applications that need multiple utility endpoints without subscription overhead

Fit

Best for

  • —AI agents and bots that can settle payments in USDC on Base via x402
  • —Developers who want zero-commitment, pay-as-you-go access to diverse API categories
  • —Web3-native applications that prefer on-chain micropayments over traditional billing

Not for

  • —High-volume production workloads where $0.02/request adds up (no volume discounts documented)
  • —Users who need detailed API documentation, request/response schemas, or SLA guarantees
  • —Teams that cannot transact in USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/carts/1 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/carts/1
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no documented request/response formats, and all docs/pricing/API pages render only a wallet-connect prompt. The specific /api/v1/carts/1 endpoint's purpose beyond 'Premium API Access' is unknown. Effectively a stub listing.

Warnings

  • —No API documentation available — /docs, /pricing, /api, and /README all render only 'Connect wallet' with no content
  • —Request and response schemas for all endpoints are completely undocumented
  • —The specific endpoint /api/v1/carts/1 ('Premium API Access') is not listed among the advertised endpoints on the homepage, making its purpose unclear
  • —No SLA, rate limit, or uptime guarantees documented

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 23:34:33Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/wNdA3S