x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/payments/101

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 `/api/v1/payments/101` is labeled "Premium API Access" and charges up to 20,000 base units of USDC (i.e., $0.02) per call. No API keys, rate limits, or upfront commitments are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

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 functionality behind the `/api/v1/payments/101` endpoint is not documented beyond its title "Premium API Access." The docs, pricing, and README pages all returned only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed documentation available from the crawl. The endpoint is confirmed live (returns a valid 402 x402 challenge), but what data or service it actually returns upon successful payment is unknown.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keyno-rate-limit

Use cases

  • —Accessing a premium API endpoint with per-request USDC micropayments on Base
  • —Agent-driven API consumption without pre-registration or API keys
  • —Testing x402 protocol payment flows against a live endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents that need keyless, pay-as-you-go API access
  • —Low-volume consumers who want no subscription commitments

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before paying
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Anyone without a Base-network USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/101 \
  -H "X-PAYMENT: <x402-payment-proof>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/101
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 the actual functionality behind 'Premium API Access' is completely undocumented. The docs pages returned only 'Connect wallet' with no content. This is effectively a stub listing.

Warnings

  • —No documentation available — docs, pricing, and README pages all return only a 'Connect wallet' prompt with no content.
  • —The specific functionality of /api/v1/payments/101 ('Premium API Access') is unknown; no request or response schema is provided.
  • —No OpenAPI specification or ai-plugin manifest found.
  • —The platform lists many endpoint categories (AI, analytics, finance, etc.) but none have documented schemas or examples.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 06:32:29Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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