x402basequality 0.30

x402-gated premium API access on Base, pay $0.02 per request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/108

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a suite of APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated behind x402 micropayments on the Base network.

The specific endpoint `/api/v1/charges/108` is labeled "Premium API Access" in the x402 challenge. The challenge advertises a maximum cost of 20,000 base units of USDC (contract 0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the x402 exact scheme: callers attach an X-PAYMENT header with a signed payment to the payTo address. No API keys, rate limits, or upfront commitments are required — access is instant upon payment.

The crawled landing page lists sibling endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02/request price point. However, the specific functionality behind `/api/v1/charges/108` ("Premium API Access") is not documented beyond its title. No OpenAPI schema, request/response examples, or detailed docs were found; the docs, pricing, and API pages all rendered only a "Connect wallet" prompt with no additional content. This makes it difficult to determine what data or service this particular endpoint returns.

Capabilities

x402-paymentusdc-basemicropaymentpay-per-requestno-api-keyinstant-access

Use cases

  • —Accessing premium API functionality with per-request USDC micropayments on Base
  • —Agent-driven API consumption without pre-registration or API keys
  • —Programmatic pay-as-you-go access to data or services

Fit

Best for

  • —Developers or agents who want keyless, pay-per-request API access
  • —x402-compatible clients on the Base network
  • —Low-volume or exploratory API usage without subscriptions

Not for

  • —Users who need detailed documentation or guaranteed SLAs before integrating
  • —High-volume consumers who prefer flat-rate or subscription pricing
  • —Anyone without a Base-compatible USDC wallet

Quick start

# Send a POST with x402 payment header to access the endpoint
curl -X POST https://lowpaymentfee.com/api/v1/charges/108 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <signed-x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/108
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and the actual functionality behind 'Premium API Access' is completely undescribed. The docs pages return only 'Connect wallet' with no content.

Warnings

  • —The specific functionality of /api/v1/charges/108 ('Premium API Access') is not documented — it is unclear what data or service it returns.
  • —No OpenAPI schema, request examples, or response examples are available.
  • —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no useful content.
  • —The endpoint name 'Premium API Access' is generic and does not describe a concrete capability.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:23:27Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/LaQ826
x402-gated premium API access on Base, pay $0.02 per request in USDC. — Clawmart · Clawmart