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/transactions/164

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/transactions/164` is listed as "Premium API Access" and returns a 402 challenge requiring payment of up to 20,000 base units of USDC (i.e., $0.02) per call. No API keys or rate limits 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 priced at $0.02 per request.

However, the specific endpoint being listed here (`/api/v1/transactions/164`) is labeled only as "Premium API Access" with no further documentation about what data or functionality it returns. The docs, pricing, and README pages on the site all render only a "Connect wallet" prompt with no additional content. Without schema details or example responses, the actual behavior of this endpoint is unclear.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyjson-responsepost-method

Use cases

  • —Accessing premium API data with per-request USDC micropayments on Base
  • —Agent-driven workflows that need keyless, pay-as-you-go API access
  • —Programmatic access to transaction or premium data without subscription commitments

Fit

Best for

  • —Developers wanting no-signup, pay-per-call API access
  • —AI agents with x402-compatible wallets on Base
  • —Users who prefer crypto micropayments over traditional API key subscriptions

Not for

  • —Users who need detailed API documentation or response schemas before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Developers without a Base-network USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/164 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/164
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 no explanation of what "Premium API Access" at /api/v1/transactions/164 actually returns. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub listing.

Warnings

  • —No documentation available — docs, pricing, and README pages only show 'Connect wallet' with no content.
  • —The specific endpoint /api/v1/transactions/164 has no description of what data or functionality it provides beyond 'Premium API Access'.
  • —No request or response schema is available; callers cannot know what to send or what to expect back.
  • —This endpoint path (/api/v1/transactions/164) does not appear in the site's own listed API catalog, raising questions about its purpose.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 12:17:22Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/w7yrx3
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart