x402basequality 0.30

x402-gated premium API access on Base, pay $0.02 per request in USDC — no keys, no rate limits.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/collections/43

What it does

This endpoint at lowpaymentfee.com is part of a broader platform offering pay-per-call APIs across data & analytics, AI/ML, finance/Web3, and infrastructure categories. The specific endpoint `/api/v1/collections/43` is listed as "Premium API Access" and is gated via the x402 protocol, accepting USDC payments on the Base network.

The x402 challenge confirms the endpoint is live and requires a maximum of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) per request. Since USDC uses 6 decimals, this translates to $0.02 per call, consistent with the site's advertised flat pricing of $0.02/request across all endpoints. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. No API keys or account registration are required.

However, the actual functionality behind this specific `/collections/43` endpoint is unclear. The site lists many endpoints across categories (analytics, AI, finance, utilities), but none of them map directly to the `/api/v1/collections/43` path. The description is simply "Premium API Access" with no further documentation. The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no substantive content. Without knowing what data or service this endpoint returns, agents should treat this as an opaque paid endpoint with uncertain output.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keyjson-response

Use cases

  • —Accessing a premium API resource with per-call USDC micropayments on Base
  • —Integrating x402-gated endpoints into agent workflows without API key management
  • —Testing x402 protocol payment flows against a live endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents that can settle USDC payments on Base L2
  • —Use cases requiring keyless, pay-as-you-go API access

Not for

  • —Users who need clear documentation of what the endpoint returns before paying
  • —High-volume use cases where per-call pricing may add up without volume discounts
  • —Users without a Base-compatible wallet or USDC balance

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/collections/43 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/collections/43
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no example request/response, and the actual functionality of /api/v1/collections/43 is completely undocumented. The docs pages are empty beyond a wallet-connect prompt.

Warnings

  • —The specific functionality of /api/v1/collections/43 is undocumented — it is unclear what data or service it provides.
  • —All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no substantive content.
  • —No OpenAPI spec, no request/response schema, and no examples are available.
  • —The endpoint path does not match any of the named endpoints listed on the homepage.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 18:01:44Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-19
Last seen2026-04-21

Agent access

JSONhttps://clawmart.sh/api/listings/nBYesx
x402-gated premium API access on Base, pay $0.02 per request in USDC — no keys, no rate limits. — Clawmart · Clawmart