x402basequality 0.35

Pay-per-call premium API access via x402 on Base network using USDC at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/apikeys/47

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific endpoint `/api/v1/apikeys/47` accepts POST requests and charges 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on the Base network, which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the X-PAYMENT header using the x402 "exact" scheme.

The broader lowpaymentfee.com platform advertises multiple API categories including 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 listed at $0.02 per request with no API keys, no rate limits, and instant access.

However, the specific endpoint `/api/v1/apikeys/47` is labeled "Premium API Access" without further documentation on what it returns. No OpenAPI schema, detailed docs, or example responses are available — the docs, pricing, and API pages all just show a "Connect wallet" prompt. The actual functionality behind this particular endpoint path is unclear and may relate to API key generation or management.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-key-requiredpost-method

Use cases

  • —Programmatic access to premium API services without traditional API key signup
  • —Agent-driven API consumption with per-request USDC micropayments on Base
  • —Accessing data, AI, finance, or utility endpoints with no subscription commitment

Fit

Best for

  • —Developers wanting instant API access without registration
  • —AI agents that can settle x402 payments autonomously
  • —Users who prefer pay-per-use over subscription models

Not for

  • —Users who need detailed API documentation before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Users without USDC on Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/apikeys/47 \
  -H "X-PAYMENT: <x402-payment-token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/apikeys/47
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02/request in USDC on Base), but there is no documentation on what this specific endpoint returns, no OpenAPI schema, no example requests or responses, and the docs pages are empty. The actual functionality of /api/v1/apikeys/47 is ambiguous.

Warnings

  • —No documentation available — docs, pricing, and API pages only show 'Connect wallet'
  • —The specific functionality of /api/v1/apikeys/47 ('Premium API Access') is undocumented
  • —No OpenAPI schema or response examples available
  • —The endpoint path suggests API key management but this is unconfirmed

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 15:05:32Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/aMe7Vm
Pay-per-call premium API access via x402 on Base network using USDC at $0.02/request. — Clawmart · Clawmart