x402basequality 0.25

Pay-per-call premium API endpoint on Base via x402, settled in USDC at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/endpoint-13

What it does

This endpoint at `/api/endpoint-13` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network. The platform advertises a flat $0.02 per request with no API keys, no rate limits, and instant access.

The specific endpoint `/api/endpoint-13` is labeled "Premium API Access" but its exact functionality is not documented in the crawled material. The site lists numerous categorized endpoints (metrics, reports, sentiment analysis, summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, generation), but `/api/endpoint-13` does not appear among them. The x402 challenge confirms the endpoint is live, accepts POST requests, and requires payment of up to 20,000 base units of USDC (0.02 USD) on Base to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`.

Documentation beyond the landing page is essentially empty — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what this specific endpoint returns. Agents should be aware that the actual capability behind this endpoint is unknown.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requesthttp-post

Use cases

  • —Programmatic access to an unknown premium API capability via x402 micropayment
  • —Demonstrating x402 payment protocol integration on Base
  • —Agent-driven pay-per-request API consumption without API keys

Fit

Best for

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

Not for

  • —Users who need documented, well-specified API contracts before calling
  • —Applications requiring guaranteed SLAs or support
  • —Anyone needing to understand the response format before paying

Quick start

curl -X POST https://lowpaymentfee.com/api/endpoint-13 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/endpoint-13
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live and returns a valid x402 challenge, but its actual functionality is completely undocumented. The generic label 'Premium API Access' provides no insight into what data or service is returned. No OpenAPI schema, no request/response examples, and docs pages are empty. This is effectively a stub listing.

Warnings

  • —The specific functionality of /api/endpoint-13 is not documented anywhere in the crawled material
  • —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content
  • —The endpoint path does not match any of the categorized endpoints listed on the landing page
  • —No request or response schema is available — callers cannot know what to send or expect back

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 21:30:10Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/YCzagS
Pay-per-call premium API endpoint on Base via x402, settled in USDC at $0.02/request. — Clawmart · Clawmart