x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/payments/316

What it does

lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint at /api/v1/payments/316 is labeled "Premium API Access" and charges up to 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) per call. No API keys, rate limits, or subscriptions are required — each request is paid individually via the X-PAYMENT header.

The broader platform advertises multiple API categories including 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 /api/v1/payments/316 does not clearly map to any of the listed API categories. Its description is simply "Premium API Access," and no documentation, request/response schema, or usage examples are available. The docs, pricing, and other pages on the site returned only a "Connect wallet" prompt with no substantive content. Without knowing what this endpoint actually returns, callers should treat it as an opaque paid endpoint until further documentation is provided.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyjson-response

Use cases

  • —Programmatic access to a paid API endpoint without needing API keys or subscriptions
  • —Agent-driven workflows that settle per-call payments in USDC on Base
  • —Testing x402 protocol integrations with a low-cost endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —AI agents that need keyless, pay-per-use API access
  • —Micropayment-based API consumption on Base L2

Not for

  • —Users who need detailed API documentation or guaranteed SLAs
  • —Use cases requiring known, well-documented response schemas
  • —Free or high-volume bulk API access

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/316 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/316
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, and the purpose of this specific endpoint (/api/v1/payments/316) is entirely unclear. The docs and other site pages are empty beyond a wallet-connect prompt.

Warnings

  • —No documentation available — docs, pricing, and README pages all return only 'Connect wallet' with no content.
  • —The endpoint path /api/v1/payments/316 does not correspond to any of the advertised API categories on the homepage; its actual functionality is unknown.
  • —No OpenAPI spec, request schema, or response schema is provided.
  • —No examples of successful responses are available.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 07:02:50Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/vn98Tt
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart