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/products/11

What it does

lowpaymentfee.com is an x402-enabled API marketplace that offers a variety of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints are pay-per-request using USDC on the Base network, with no API keys, no rate limits, and no subscriptions required. The specific endpoint at `/api/v1/products/11` is listed as "Premium API Access" and accepts POST requests.

The x402 challenge confirms the endpoint is live, accepting payments in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base) with a max amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). Payment is made via the `exact` scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second timeout.

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 are priced at $0.02 per request. However, documentation beyond the landing page is essentially empty (all doc/pricing/API pages just show "Connect wallet"), so the actual functionality, request/response schemas, and data sources behind these endpoints are unknown.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keypost-endpointjson-response

Use cases

  • —Accessing premium API data without subscription or API key management
  • —Making one-off paid API calls settled in USDC on Base
  • —Agent-driven API consumption with per-request crypto payments

Fit

Best for

  • —Developers who want zero-friction API access without sign-up
  • —AI agents that can settle x402 payments autonomously
  • —Users who prefer pay-per-use over monthly subscriptions

Not for

  • —Users who need detailed API documentation or schemas before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Developers who cannot transact in USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/products/11 \
  -H "Content-Type: application/json"
# Returns 402 with x402 payment challenge; attach X-PAYMENT header with signed USDC payment to access.

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/11
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and the x402 challenge is well-formed with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and every documentation page is empty. The actual functionality behind 'Premium API Access' at /api/v1/products/11 is completely opaque.

Warnings

  • —No documentation available — all doc/pricing/API pages return only 'Connect wallet' with no content.
  • —The purpose and functionality of /api/v1/products/11 ('Premium API Access') is not described anywhere; it does not match any of the named endpoints on the landing page.
  • —No request or response schema is provided; callers cannot know what to send or what to expect back.
  • —No robots.txt or agents.txt found.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 23:53:38Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/P3sxTV
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart