x402basequality 0.35

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/payments/64

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a variety of endpoints across data analytics, AI/ML inference, finance/Web3, 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/payments/64` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The 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).

Documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed documentation for any endpoint. The x402 challenge is live and well-formed, confirming the endpoint is operational, but the lack of documentation makes it difficult to know what request body to send or what response to expect from this particular endpoint.

Capabilities

x402-paymentpay-per-requestusdc-settlementbase-networkno-api-keyno-rate-limitsdata-analyticsai-inferencesentiment-analysistext-summarizationclassificationembeddingsfinance-datageocoding

Use cases

  • —Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) without API key signup
  • —Fetching real-time financial data and crypto gas estimates on a per-request basis
  • —Running geocoding, validation, or data conversion utilities with instant pay-per-use pricing
  • —Exporting analytics data or generating insights reports via micropayments

Fit

Best for

  • —Agents or developers who want instant API access without account creation
  • —Low-volume or sporadic API usage where subscriptions are wasteful
  • —Crypto-native workflows that can attach x402 payment headers natively

Not for

  • —High-volume production workloads where per-request pricing adds up quickly
  • —Users who need detailed API documentation, SDKs, or guaranteed SLAs
  • —Non-crypto users who cannot generate x402 payment headers

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/64 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/64
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 documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. No OpenAPI schema, no request/response examples, and the specific purpose of the /api/v1/payments/64 endpoint beyond 'Premium API Access' is unknown.

Warnings

  • —Documentation pages (/docs, /api, /pricing, /README) all render only 'Connect wallet' with no usable content
  • —No OpenAPI or schema available — request and response formats are unknown
  • —The purpose and expected input/output of /api/v1/payments/64 specifically is unclear; it may be a generic or demo endpoint
  • —The platform lists many endpoint categories but none have documented schemas or examples

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 07:18:40Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/f82wrc
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart