x402basequality 0.30

Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/229

What it does

lowpaymentfee.com offers a suite of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. The specific endpoint at `/api/v1/charges/229` is labeled "Premium API Access" and accepts POST requests. Payment is settled in USDC (contract 0x8335…2913 on Base) with a maximum amount of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals). No API keys, rate limits, or upfront commitments are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The broader 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 the same $0.02/request price point.

However, the specific endpoint `/api/v1/charges/229` does not clearly map to any of the named API categories on the landing page, and no documentation, request/response schemas, or examples are available. The docs, pricing, and API pages all returned only a "Connect wallet" prompt with no substantive content. Without knowing what data or functionality this particular charge endpoint returns, callers should treat this as an opaque premium endpoint until further documentation is published.

Capabilities

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

Use cases

  • —Programmatic access to premium API functionality paid per-call with USDC on Base
  • —Agent-driven workflows that need keyless, on-demand API access without subscriptions
  • —Testing x402 payment protocol integrations against a live endpoint

Fit

Best for

  • —Developers wanting zero-commitment, pay-as-you-go API access
  • —AI agents that can settle x402 payments autonomously
  • —Users already holding USDC on the Base network

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —Anyone looking for free or fiat-only payment options

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/229 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/229
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, and no indication of what this specific endpoint actually returns. The docs/pricing/API pages are all empty beyond a wallet-connect prompt. This is effectively a stub listing.

Warnings

  • —No documentation available — docs, pricing, and API pages all return only 'Connect wallet' with no content
  • —The endpoint path /api/v1/charges/229 does not correspond to any named API on the landing page; its actual functionality is unknown
  • —No request or response schema is provided; callers cannot know what to send or what to expect back
  • —No OpenAPI spec, ai-plugin manifest, or agents.txt discovered

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:33:03Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/J5J6t6
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart