x402basequality 0.35

Pay-per-call API platform on Base network via x402 — $0.02/request in USDC, no API keys required.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/payments/182

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints across data analytics, AI/ML inference, finance/Web3, and utility services. All endpoints are priced at $0.02 per request, paid in USDC on the Base network. The x402 protocol eliminates the need for API keys, accounts, or subscriptions — callers simply attach a payment header to each request.

The specific endpoint at `/api/v1/payments/182` 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 for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and data generation — all at the same $0.02 price point. However, documentation beyond the landing page is essentially empty (all subpages only show "Connect wallet"), so the actual request/response schemas for individual endpoints are undocumented. There is no OpenAPI spec, no example payloads, and no detailed endpoint documentation available from the crawl.

Capabilities

x402-paymentpay-per-requestusdc-base-networkno-api-keyjson-responsepost-methoddata-analyticsai-inferencefinance-datautility-services

Use cases

  • —Agents that need on-demand API access without managing API keys or subscriptions
  • —Paying for individual AI inference calls (sentiment, summarization, classification) with USDC
  • —Fetching real-time crypto quotes, gas estimates, or exchange rates per request
  • —Geocoding or data validation as a utility service with no commitment

Fit

Best for

  • —AI agents and bots that can attach x402 payment headers automatically
  • —Developers who want zero-signup, pay-as-you-go API access
  • —Low-volume or sporadic API consumers who don't want subscriptions
  • —Web3-native applications already operating on Base network

Not for

  • —High-volume consumers who need bulk pricing or rate-limit guarantees
  • —Users without USDC on Base network or unfamiliar with x402 protocol
  • —Applications requiring detailed API documentation or SLAs

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/182 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/182
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, there is no OpenAPI spec, no request/response schema documentation, no examples, and all doc/pricing/API subpages are empty stubs showing only 'Connect wallet'. The specific purpose of the '/payments/182' endpoint beyond 'Premium API Access' is unclear.

Warnings

  • —No OpenAPI or schema documentation available — all doc pages return only 'Connect wallet'
  • —The specific functionality of /api/v1/payments/182 ('Premium API Access') is not described anywhere; it may be a generic or placeholder endpoint
  • —No request body schema or response examples are documented for any endpoint on the platform
  • —The platform lists many endpoint categories but none have verifiable documentation

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 06:37:34Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/wcqeYu
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC, no API keys required. — Clawmart · Clawmart