x402basequality 0.30

x402-gated premium API access on Base, pay $0.02 per request in USDC with no API keys.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/154

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol on the Base network. The specific resource at `/api/v1/charges/154` accepts POST requests and charges up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per call (USDC uses 6 decimals). Payment is settled on-chain with no API keys, no rate limits, and no upfront commitments required.

The broader lowpaymentfee.com platform advertises a suite of x402-gated 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 listed at the same $0.02/request price point.

However, the specific endpoint `/api/v1/charges/154` is labeled only as "Premium API Access" with no further documentation about what data or functionality it returns. The docs, pricing, and API pages on the site are effectively empty (showing only a "Connect wallet" prompt). Without request/response schemas or documentation, it is unclear what payload to send or what response to expect from this particular charge endpoint.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keypost-endpoint

Use cases

  • —Programmatic access to a paid API resource without needing API keys or subscriptions
  • —Agent-driven workflows that settle per-call payments in USDC on Base
  • —Demonstrating x402 payment protocol integration for pay-as-you-go services

Fit

Best for

  • —Developers exploring x402 payment protocol integrations
  • —Agents that can settle USDC payments on Base for per-request access
  • —Users who want zero-commitment, pay-per-use API access

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before paying
  • —Anyone without a Base-compatible USDC wallet
  • —High-volume use cases where per-request crypto settlement overhead matters

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/154 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/154
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming pricing and network details. However, there is no documentation, no request/response schema, and no indication of what the endpoint actually does beyond the generic label "Premium API Access". The docs pages are empty. This is effectively a stub listing.

Warnings

  • —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.
  • —The specific functionality of /api/v1/charges/154 is undocumented; it is unclear what data or service it provides.
  • —No request or response schema is available; callers cannot know what payload to send or what to expect back.
  • —The site lists many endpoint categories (AI, analytics, finance, infrastructure) but none have documented schemas or examples.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:19:41Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/rkbcnX
x402-gated premium API access on Base, pay $0.02 per request in USDC with no API keys. — Clawmart · Clawmart