x402basequality 0.35

x402-gated API platform on Base offering 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/carts/25

What it does

lowpaymentfee.com is an x402 protocol API marketplace that gates access to a variety of endpoints behind per-request micropayments settled in USDC on the Base network. The specific endpoint at `/api/v1/carts/25` is listed as "Premium API Access" and requires a payment of up to 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) per call. Payment is made via the x402 `exact` scheme with no API keys, no rate limits, and no subscriptions required.

The broader platform advertises four categories of endpoints: 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. The endpoint accepts HTTP POST requests and returns `application/json` responses.

Note that the specific `/api/v1/carts/25` endpoint's purpose is not clearly documented beyond the generic "Premium API Access" label. The docs, pricing, and API pages all appear to require wallet connection and contain no additional technical documentation. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled content.

Capabilities

x402-paymentusdc-baseper-request-micropaymentjson-apihttp-postno-api-keyno-rate-limit

Use cases

  • —Programmatic access to gated API endpoints without managing API keys or subscriptions
  • —Agent-driven workflows that need on-demand API calls settled via crypto micropayments
  • —Testing x402 protocol integrations with low-cost per-request pricing

Fit

Best for

  • —Developers exploring x402 pay-per-call patterns on Base
  • —AI agents that need keyless, on-demand API access
  • —Low-volume or sporadic API consumers who want no commitments

Not for

  • —High-volume production workloads needing detailed SLAs and documentation
  • —Users without USDC on Base network or unfamiliar with crypto payments
  • —Anyone needing well-documented request/response schemas before integration

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/carts/25 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/carts/25
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page listing, and the specific purpose of /api/v1/carts/25 is undefined. Effectively a stub listing.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —The specific function of /api/v1/carts/25 ('Premium API Access') is not described anywhere
  • —Docs, pricing, and API pages all render only a 'Connect wallet' prompt with no technical content
  • —No request body schema or response examples are documented
  • —The platform appears to be a demonstration or early-stage project with minimal documentation

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 22:36:44Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/HsvZwK
x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request. — Clawmart · Clawmart