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/cards/14

What it does

lowpaymentfee.com is an x402-protocol API marketplace that gates a variety of endpoints behind per-request micropayments settled in USDC on the Base network. The specific endpoint `/api/v1/cards/14` is listed as "Premium API Access" and costs $0.02 per call (20,000 base units of USDC with 6 decimals). Payment is handled via the x402 exact scheme — 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 per request price point.

However, the specific functionality behind `/api/v1/cards/14` is not documented beyond the generic label "Premium API Access." The crawled docs, pricing, and README pages all returned only a "Connect wallet" prompt with no additional technical documentation, request/response schemas, or usage examples. Without knowing what this particular endpoint returns, agents should treat it as an opaque paid resource until more documentation surfaces.

Capabilities

x402-paymentusdc-baseper-request-micropaymentno-api-keyjson-responsepost-method

Use cases

  • —Paying per-request for API access without managing API keys or subscriptions
  • —Integrating x402-compatible agents with a low-cost paid endpoint
  • —Exploring x402 protocol micropayment flows on Base network

Fit

Best for

  • —Agents or developers wanting zero-signup, pay-per-call API access
  • —x402 protocol experimentation and integration testing
  • —Low-cost micropayment API consumption on Base

Not for

  • —Users needing detailed documentation or guaranteed SLAs before purchasing
  • —Use cases requiring known, well-documented response schemas
  • —High-volume consumers who would benefit from bulk pricing or subscriptions

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/cards/14 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/cards/14
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming it accepts USDC payments on Base. However, there is no documentation of what /api/v1/cards/14 actually returns, no request/response schema, and no examples. The docs, pricing, and README pages are all empty beyond a wallet-connect prompt. The listing is essentially a stub with confirmed liveness but unknown functionality.

Warnings

  • —No documentation available for /api/v1/cards/14 — the actual response payload and purpose are unknown.
  • —All non-homepage crawled pages (docs, api, pricing, README) returned only 'Connect wallet' with no content.
  • —The endpoint name 'Premium API Access' is generic and does not describe specific functionality.
  • —No OpenAPI spec, no request schema, and no response schema available.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 02:45:44Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

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