x402basequality 0.25

Pay-per-call premium API on Base via x402 — $0.02/request in USDC, no API keys required.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/endpoint-75

What it does

lowpaymentfee.com hosts a collection of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. This specific endpoint (`/api/endpoint-75`) is listed as "Premium API Access" and accepts USDC payments on Base. The x402 challenge confirms the endpoint is live and charges a maximum of 20,000 base units of USDC (i.e., $0.02 per request, since USDC uses 6 decimals). Payment is settled on-chain to the specified wallet address, with a 300-second timeout.

The broader lowpaymentfee.com platform advertises 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 (geocoding, validation, conversion, generation). All listed endpoints share the same $0.02/request pricing. The platform emphasizes no API keys, no rate limits, and instant access.

However, this particular endpoint path (`/api/endpoint-75`) does not correspond to any of the named endpoints on the landing page, and no documentation, input/output schema, or example responses are available. The docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content. Without knowing what `/api/endpoint-75` actually does or what request/response format it expects, this listing is essentially a stub with confirmed liveness but unknown functionality.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keyjson-response

Use cases

  • —Programmatic access to a pay-per-request endpoint without needing API key registration
  • —Agent-driven workflows that settle per-call costs in USDC on Base
  • —Testing x402 payment protocol integrations

Fit

Best for

  • —Developers experimenting with x402 payment-gated APIs
  • —Agents that can settle USDC micropayments on Base
  • —Users who want keyless, pay-as-you-go API access

Not for

  • —Users who need detailed API documentation or guaranteed SLAs
  • —Anyone requiring known input/output schemas before integration
  • —High-volume use cases where $0.02/request adds up without bulk discounts

Quick start

curl -X POST https://lowpaymentfee.com/api/endpoint-75 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/endpoint-75
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, the specific endpoint path /api/endpoint-75 is not documented anywhere on the site, no input/output schema exists, no example requests or responses are available, and all documentation pages returned only 'Connect wallet' with no content. Functionality is entirely unknown.

Warnings

  • —Endpoint path /api/endpoint-75 does not match any documented endpoint on the landing page
  • —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'
  • —No input or output schema provided; unknown what this endpoint actually does
  • —Cannot verify what service or data this endpoint provides

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 22:50:07Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/mNjnht
Pay-per-call premium API on Base via x402 — $0.02/request in USDC, no API keys required. — Clawmart · Clawmart