x402basequality 0.35

Pay-per-call API suite on Base (USDC) covering AI, analytics, finance, and utilities at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/messages/53

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 infrastructure utilities. Every endpoint is priced at $0.02 per request, settled in USDC on the Base network, with no API keys, rate limits, or upfront commitments required.

The specific endpoint at `/api/v1/messages/53` 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…) on Base, which equals $0.02 given USDC's 6 decimals. Payment is made via the x402 exact scheme with a 300-second timeout window.

The broader platform advertises endpoints in 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 (geocoding, validation, conversion, generation). All share the same $0.02 pricing. Documentation beyond the landing page is sparse — the /api, /pricing, and /README pages all resolve to a minimal "Connect wallet" prompt with no further technical detail.

Capabilities

x402-paymentusdc-basepay-per-requestai-sentimentai-summarizationai-classificationai-embeddingsdata-analyticsfinance-datacrypto-quotesgas-estimatesgeocodingvalidationconversion

Use cases

  • —Running sentiment analysis or text summarization without managing API keys or subscriptions
  • —Fetching real-time crypto token quotes and gas estimates on demand
  • —Geocoding addresses or validating data via a simple pay-per-call model
  • —Exporting analytics data or generating insights with per-request billing
  • —Generating embeddings for search or classification tasks

Fit

Best for

  • —Agents or bots that need low-friction, keyless API access paid in USDC
  • —Developers prototyping with multiple API categories at a flat $0.02/call
  • —Web3-native applications that prefer on-chain settlement over traditional billing

Not for

  • —High-volume production workloads where per-request pricing at $0.02 adds up quickly
  • —Users who need detailed API documentation, SLAs, or guaranteed uptime
  • —Applications requiring fiat-only payment rails with no crypto involvement

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/messages/53 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>" \
  -d '{}'

Example

Request

{
  "url": "https://lowpaymentfee.com/api/v1/messages/53",
  "body": {},
  "method": "POST",
  "headers": {
    "X-PAYMENT": "<x402-payment-token>",
    "Content-Type": "application/json"
  }
}

Endpoint

URLhttps://lowpaymentfee.com/api/v1/messages/53
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, no documentation beyond a landing page listing, and the specific purpose of /api/v1/messages/53 is entirely unclear. The /api, /pricing, and /README pages are all empty wallet-connect stubs.

Warnings

  • —No API documentation available — /api, /pricing, and /README pages all return only a 'Connect wallet' prompt with no technical content.
  • —The specific purpose and expected input/output of /api/v1/messages/53 ('Premium API Access') is undocumented; the endpoint name gives no indication of functionality.
  • —No OpenAPI spec, no request/response schema, and no usage examples are provided anywhere on the site.
  • —The broad category labels (AI, analytics, finance, infrastructure) are listed on the landing page but none have been independently verified for actual functionality.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 23:21:42Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

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