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/transfers/131

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/transfers/131` is listed as "Premium API Access" and costs $0.02 per call (20,000 base units of USDC with 6 decimals). No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header to each request.

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 priced at $0.02 per request. Payments settle in USDC on the Base L2 network.

However, the specific functionality behind the `/api/v1/transfers/131` endpoint is unclear. The name "Premium API Access" and the path segment "transfers/131" do not map obviously to any of the documented API categories. No OpenAPI schema, request/response examples, or detailed documentation were found during the crawl — the docs, pricing, and API pages all returned only a "Connect wallet" prompt with no substantive content. The endpoint is confirmed live (returns a valid 402 challenge), but what it actually returns after payment is unknown.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyno-rate-limits

Use cases

  • —Paying per-call for API access without needing an account or API key
  • —Programmatic agent access to paid endpoints using x402 protocol
  • —Integrating USDC-settled API calls into crypto-native workflows

Fit

Best for

  • —Developers wanting zero-signup API access via crypto payments
  • —AI agents that can settle x402 payments autonomously
  • —Users who prefer pay-as-you-go with no subscriptions

Not for

  • —Users who need detailed documentation or guaranteed SLAs before purchasing
  • —Anyone without a Base-network USDC wallet
  • —Use cases requiring free or fiat-only payment methods

Quick start

# The endpoint requires an x402 payment header with USDC on Base.
# Cost: $0.02 per request (20000 base units USDC)
curl -X POST https://lowpaymentfee.com/api/v1/transfers/131 \
  -H "X-PAYMENT: <x402-payment-token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transfers/131
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 payment details. However, there is no documentation, no OpenAPI schema, no request/response examples, and the actual functionality of this specific endpoint ('Premium API Access' at /api/v1/transfers/131) is entirely unclear. The crawled docs/pricing/API pages were all empty beyond a wallet-connect prompt.

Warnings

  • —No documentation available — docs, pricing, and API pages all show only 'Connect wallet' with no content.
  • —The specific functionality of /api/v1/transfers/131 ('Premium API Access') is unknown and does not match any documented API category.
  • —No OpenAPI schema or request/response examples are available.
  • —No way to verify what data or service is returned after payment without actually paying.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 14:01:53Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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