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/accounts/18

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 utility services. 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/accounts/18` 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 payment scheme is "exact" with a 300-second timeout. The endpoint accepts POST requests and returns application/json.

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). Documentation pages exist but appear to require wallet connection and contain no visible content. No OpenAPI schema, request/response examples, or detailed endpoint documentation were found in the crawl.

Capabilities

x402-paymentusdc-basepay-per-requestdata-analyticsai-inferencesentiment-analysistext-summarizationclassificationembeddingsfinance-datacrypto-datageocodingutility-services

Use cases

  • —Agents needing on-demand AI inference (sentiment, summarization, classification, embeddings) without API key management
  • —Fetching real-time crypto prices, gas estimates, or exchange rates with per-call payment
  • —Running geocoding or data validation utilities without subscription commitments
  • —Exporting analytics data or generating insights on a pay-as-you-go basis

Fit

Best for

  • —AI agents that need keyless, pay-per-call access to diverse API endpoints
  • —Developers prototyping with multiple API categories without managing subscriptions
  • —Crypto-native applications already operating on Base network with USDC

Not for

  • —High-volume production workloads where per-call pricing at $0.02 adds up quickly
  • —Users who need detailed API documentation, schemas, or SLA guarantees before integrating

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/18 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/18
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no OpenAPI schema, no request/response examples, no visible documentation (all doc pages just show 'Connect wallet'), and the specific purpose of `/api/v1/accounts/18` ('Premium API Access') is entirely unclear. The listing is effectively a stub with confirmed liveness.

Warnings

  • —The specific function of /api/v1/accounts/18 is undocumented — 'Premium API Access' is vague and could mean anything
  • —All documentation pages (docs, api, pricing, README) render only 'Connect wallet' with no visible content
  • —No OpenAPI or JSON schema is available for any endpoint
  • —No request body format or response structure is documented anywhere in the crawl
  • —The broader platform lists many endpoints but none have documented input/output contracts

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 00:20:23Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

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