x402basequality 0.30

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/53

What it does

lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/products/53` is listed as "Premium API Access" and returns an x402 challenge requiring a maximum of 20,000 base units of USDC (i.e., $0.02) per call. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The broader platform offers endpoints across 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 utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request.

This particular endpoint (`/api/v1/products/53`) is labeled "Premium API Access" but its actual functionality is unclear — the description is generic and no schema or documentation describes what data it returns. The docs, pricing, and API pages on the site all render only a "Connect wallet" prompt with no additional content. Callers should be aware that the endpoint's concrete behavior is undocumented beyond its name.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyjson-responsehttp-post

Use cases

  • —Programmatic access to a premium API endpoint with per-request USDC micropayments
  • —Agent-driven workflows that need keyless, pay-as-you-go API access on Base
  • —Testing x402 protocol integrations with a low-cost endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —AI agents that can settle USDC payments on Base
  • —Users who want no-signup, no-API-key access to paid endpoints

Not for

  • —Users who need detailed API documentation or schemas before calling
  • —Anyone without a Base-network USDC wallet
  • —High-volume use cases where $0.02/request adds up without bulk discounts

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/products/53 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

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

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, confirming pricing and payment details. However, there is no documentation, no OpenAPI schema, no example request/response, and the actual functionality of /api/v1/products/53 is completely undocumented. The docs pages render only 'Connect wallet' with no content.

Warnings

  • —The actual functionality of /api/v1/products/53 ('Premium API Access') is undocumented — it is unclear what data or service it provides.
  • —All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no usable content.
  • —No OpenAPI schema, no request/response examples, and no input parameters are documented anywhere.
  • —The endpoint name 'Premium API Access' is generic and does not describe a specific capability.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 22:07:47Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

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