x402basequality 0.35

Pay-per-call API platform on Base (USDC) covering data, AI, finance, and utility endpoints at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/keys/77

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints settled in USDC on the Base network. The specific endpoint `/api/v1/keys/77` is listed as "Premium API Access" and costs up to $0.02 per call (maxAmountRequired of 20,000 base units of USDC, which is 6-decimal, equaling $0.02). No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each request.

The platform advertises four endpoint 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.

The `/api/v1/keys/77` endpoint specifically is labeled "Premium API Access" but its actual functionality is unclear from the available documentation — no OpenAPI schema, request/response examples, or detailed docs were found. The site's non-root pages (pricing, README, API docs) all resolve to a minimal "Connect wallet" prompt, providing no additional technical detail. Callers should be aware that the concrete behavior of this endpoint is undocumented beyond its title.

Capabilities

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

Use cases

  • —Programmatic access to a pay-per-call API without needing to register or manage API keys
  • —Agent-driven workflows that need on-demand API access settled via crypto micropayments
  • —Testing x402 payment flows against a live endpoint on Base

Fit

Best for

  • —Developers wanting zero-friction, keyless API access via x402
  • —AI agents that can autonomously pay for API calls using USDC on Base
  • —Prototyping x402 payment integrations at low cost ($0.02/call)

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —Applications requiring non-crypto payment methods (no fiat/card option available)

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/keys/77 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/keys/77
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no request/response examples, and no documentation beyond the endpoint title. The actual functionality of /api/v1/keys/77 is unknown, making this effectively a stub listing.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —The actual functionality behind 'Premium API Access' at /api/v1/keys/77 is undocumented
  • —All documentation pages (pricing, README, API) resolve to a minimal 'Connect wallet' page with no content
  • —Request and response formats are entirely unknown

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 22:18:30Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-21

Agent access

JSONhttps://clawmart.sh/api/listings/WhDMMR
Pay-per-call API platform on Base (USDC) covering data, AI, finance, and utility endpoints at $0.02/request. — Clawmart · Clawmart