x402basequality 0.30

Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/9

What it does

lowpaymentfee.com hosts a collection of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. The specific endpoint at `/api/v1/charges/9` is labeled "Premium API Access" and accepts POST requests. Payment is settled in USDC (contract 0x8335…2913 on Base) with a maximum charge of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals). No API keys, rate limits, or upfront commitments are required — callers simply attach an X-PAYMENT header to each request.

The broader lowpaymentfee.com platform advertises endpoints across 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 endpoints are listed at the same $0.02/request price point. However, the specific endpoint probed here (`/api/v1/charges/9`) is simply described as "Premium API Access" without further detail on what data or functionality it returns.

Documentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/charges/9` endpoint actually returns. The endpoint is confirmed live (returns a valid 402 x402 challenge), but the lack of documentation makes it difficult to determine its actual utility.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keypost-endpoint

Use cases

  • —Accessing premium API data without signing up for an account or obtaining API keys
  • —Making one-off paid API calls settled instantly in USDC on Base
  • —Integrating pay-per-request endpoints into agent workflows via x402 protocol

Fit

Best for

  • —Developers wanting zero-signup, pay-as-you-go API access
  • —AI agents that can settle x402 payments autonomously on Base
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —Anyone without a Base-compatible wallet or USDC balance
  • —High-volume use cases where per-request pricing may add up compared to flat-rate plans

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/9 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/9
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 documentation, no OpenAPI schema, no request/response examples, and no clear description of what this specific endpoint returns. The site's docs pages are empty beyond a wallet-connect prompt. Effectively a stub listing.

Warnings

  • —No documentation available — /docs, /api, /pricing, and /README pages are empty
  • —No OpenAPI or schema describing request parameters or response format
  • —The specific functionality of /api/v1/charges/9 ('Premium API Access') is undefined — it is unclear what data or service it provides
  • —Cannot verify actual response content without making a paid request

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 04:09:17Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/7qy5NH
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart