x402basequality 0.30

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-26

What it does

lowpaymentfee.com hosts a collection of pay-per-request API endpoints settled on the Base network using the x402 protocol and USDC. The specific endpoint `/api/endpoint-26` is labeled "Premium API Access" and charges up to 20,000 base units of USDC (i.e., $0.02) per call. No API keys, subscriptions, or rate limits are advertised — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

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 utilities (geocoding, validation, conversion, generation). All listed endpoints share the same $0.02/request pricing. However, the specific endpoint `/api/endpoint-26` does not map to any of the named endpoints on the landing page, so its exact functionality is unclear.

The endpoint is live and returns a well-formed x402 challenge (HTTP 402) with payment accepted via the "exact" scheme on Base mainnet to USDC contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`. The payment timeout is 300 seconds. Documentation pages (/docs, /pricing, /api, /README) all returned only a "Connect wallet" prompt with no substantive content, so there is no schema documentation, request/response examples, or detailed feature description available.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keyhttp-post

Use cases

  • —Programmatic access to a premium API endpoint without needing API keys or subscriptions
  • —Agent-driven workflows that settle per-call costs in USDC on Base
  • —Testing x402 payment flows against a low-cost live endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —AI agents that need keyless, pay-as-you-go API access
  • —Low-cost per-request usage without commitments

Not for

  • —Users who need detailed API documentation or guaranteed SLAs
  • —Anyone requiring a known, well-documented response schema before integrating

Quick start

curl -X POST https://lowpaymentfee.com/api/endpoint-26 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/endpoint-26
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, but the specific functionality of /api/endpoint-26 is unknown — it doesn't correspond to any named endpoint on the site. All documentation pages are empty (just 'Connect wallet'). No request/response schema, no examples, and no description of what the endpoint actually does.

Warnings

  • —The endpoint path /api/endpoint-26 does not match any of the named endpoints listed on the landing page; its actual functionality is unknown.
  • —All documentation pages (/docs, /pricing, /api, /README) returned no useful content — only a 'Connect wallet' prompt.
  • —No OpenAPI spec, request schema, or response schema is available; callers cannot know what to send or expect back.
  • —The platform appears to be a generic demo or placeholder site; endpoint reliability and data quality are unverified.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 20:36:15Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/EGJ4rt
Pay-per-call premium API on Base via x402 — $0.02/request in USDC, no API keys required. — Clawmart · Clawmart