x402basequality 0.40

Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/transactions/115

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. All endpoints are pay-per-request at $0.02 each, settled in USDC on the Base network. No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header to each request.

The specific endpoint at `/api/v1/transactions/115` is listed as "Premium API Access" and its x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment scheme is "exact" with a 300-second timeout. The endpoint accepts POST requests and returns application/json.

The broader platform advertises categories including: 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 (geocoding, validation, conversion, generation). However, documentation pages beyond the landing page returned only a "Connect wallet" stub, so detailed request/response schemas for individual endpoints are not available.

Capabilities

x402-paymentusdc-basepay-per-requestdata-analyticsai-inferencesentiment-analysistext-summarizationclassificationembeddingsfinance-datacrypto-quotesgas-estimatesgeocodingvalidationconversion

Use cases

  • —Agent-driven data retrieval without API key management
  • —On-demand AI inference (sentiment, summarization, classification, embeddings) paid per call
  • —Fetching real-time crypto prices, gas estimates, and exchange rates
  • —Geocoding and data validation as utility microservices
  • —Programmatic data export and analytics reporting

Fit

Best for

  • —AI agents needing keyless, pay-as-you-go API access
  • —Developers who want to avoid subscription commitments for low-volume usage
  • —Web3-native applications that can settle payments in USDC on Base

Not for

  • —High-volume production workloads where per-request pricing becomes expensive
  • —Users without a Base-compatible wallet or USDC holdings
  • —Applications requiring detailed SLAs, guaranteed uptime, or support contracts

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/115 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/115
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.40/ 1.00

The x402 challenge is live and well-formed, confirming the endpoint works and pricing is clear ($0.02 USDC on Base). However, documentation pages are empty stubs ('Connect wallet'), there is no OpenAPI spec, no request/response schema, and no examples. The specific purpose of '/api/v1/transactions/115' beyond 'Premium API Access' is unclear.

Warnings

  • —Documentation pages (/docs, /api, /pricing, /README) all return only 'Connect wallet' with no actual content
  • —No OpenAPI or schema available — request and response formats for this endpoint are unknown
  • —The specific function of /api/v1/transactions/115 is not documented; 'Premium API Access' is a generic label
  • —The broader catalog lists many endpoint categories but none have documented schemas or example payloads

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 12:05:13Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/dMvrUv
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart