x402basequality 0.25

x402-gated premium API access on Base, pay $0.02 per request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/cards/17

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific resource `/api/v1/cards/17` is one of many endpoints offered by the platform, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, payable in USDC on the Base network with no API keys, rate limits, or commitments required.

The x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract 0x8335…2913 on Base) to address 0x1A2B…85F3. The maxAmountRequired of 20000 base units corresponds to $0.02 (USDC uses 6 decimals). The endpoint returns application/json responses. However, the specific functionality behind `/api/v1/cards/17` is not documented — the name "Premium API Access" is generic and the crawled site does not list this particular path among its advertised APIs.

Documentation is extremely sparse. The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what the `/cards/17` resource actually returns. While the platform advertises a broad suite of endpoints (analytics, AI, finance, utilities), the specific behavior of this cards endpoint is unknown.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestjson-responseno-api-key

Use cases

  • —Accessing a paid API endpoint without needing API keys or subscriptions
  • —Making one-off API calls settled instantly in USDC on Base
  • —Agent-driven programmatic access to premium data or services

Fit

Best for

  • —Developers wanting zero-commitment pay-per-request API access
  • —AI agents that can settle x402 payments in USDC on Base
  • —Users who prefer crypto micropayments over traditional billing

Not for

  • —Users who need detailed documentation or guaranteed SLAs before integrating
  • —Anyone without a Base-compatible USDC wallet
  • —Use cases requiring known, well-documented response schemas

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/cards/17 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/cards/17
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live and returns a valid x402 challenge, but the specific resource (/api/v1/cards/17) is not documented anywhere on the site. There is no OpenAPI schema, no request/response examples, and no explanation of what 'Premium API Access' actually provides. Documentation pages are empty beyond a wallet-connect prompt. This is effectively a stub listing.

Warnings

  • —The specific endpoint /api/v1/cards/17 is not listed among the site's advertised APIs — its actual functionality is unknown.
  • —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no usable content.
  • —No OpenAPI schema, request format, or response examples are available.
  • —The name 'Premium API Access' is generic and does not describe what the endpoint does.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 02:45:42Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/99yyac
x402-gated premium API access on Base, pay $0.02 per request in USDC. — Clawmart · Clawmart