x402basequality 0.30

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/cards/67

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 `/api/v1/cards/67` is listed as "Premium API Access" and requires a payment of up to 20,000 base units of USDC (i.e., $0.02) per call. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an x402 payment header to each request.

The broader platform organizes its endpoints into 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 per-request pricing.

Note that the `/api/v1/cards/67` endpoint's actual functionality is not documented beyond the generic label "Premium API Access." There is no OpenAPI schema, no request/response examples, and the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further content. The endpoint is confirmed live (returns a valid 402 x402 challenge), but what data or service it returns upon successful payment is unknown.

Capabilities

x402-payment-gatedper-request-micropaymentusdc-base-settlementpost-endpointjson-response

Use cases

  • —Paying per-request for API access without needing API keys or subscriptions
  • —Integrating x402-compatible agents that autonomously pay for endpoint calls
  • —Accessing a variety of data, AI, finance, and utility services via micropayments

Fit

Best for

  • —Developers or agents wanting zero-signup, pay-as-you-go API access
  • —x402-compatible wallets and autonomous agents on Base
  • —Low-volume or sporadic API consumers who prefer per-call billing

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before purchasing
  • —High-volume consumers seeking bulk pricing or subscription discounts
  • —Anyone without a Base-network USDC wallet or x402-compatible client

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/cards/67 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/cards/67
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid x402 402 challenge, but there is no OpenAPI schema, no request/response examples, and no documentation beyond a generic title. The actual functionality of /api/v1/cards/67 is entirely unknown. Docs pages render only 'Connect wallet' with no content.

Warnings

  • —The specific function of /api/v1/cards/67 ('Premium API Access') is undocumented — it is unclear what data or service is returned upon payment.
  • —No OpenAPI schema, request format, or response examples are available.
  • —All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no usable content.
  • —The broader platform lists many endpoints but none have detailed documentation visible in the crawl.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:06:59Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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