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/transfers/61

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/transfers/61` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02) per call. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The broader platform offers 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 priced at $0.02 per request.

This particular endpoint (`/api/v1/transfers/61`) is labeled "Premium API Access" but its actual functionality is not documented beyond that label. The crawled docs, pricing, API, and README pages all returned only a "Connect wallet" prompt with no further content. Without additional documentation or example responses, the exact data returned by this endpoint remains unclear.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyhttp-post

Use cases

  • —Programmatic access to premium data or services without API key registration
  • —Agent-driven workflows that need instant, keyless API access with crypto micropayments
  • —Testing x402 protocol integrations with a low-cost endpoint

Fit

Best for

  • —Developers or agents wanting keyless, pay-per-use API access
  • —x402-compatible wallets and agent frameworks on Base
  • —Low-cost micropayment experimentation

Not for

  • —Users who need detailed documentation or guaranteed SLAs before integrating
  • —Anyone without a Base-network USDC wallet or x402-compatible client

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transfers/61 \
  -H "X-PAYMENT: <x402-payment-proof>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transfers/61
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming pricing and network. However, there is no OpenAPI schema, no example request/response, and the docs/pricing/README pages are all empty (just 'Connect wallet'). The actual functionality behind 'Premium API Access' at /api/v1/transfers/61 is undocumented, making this effectively a stub listing.

Warnings

  • —Endpoint functionality is undocumented — 'Premium API Access' label gives no detail on what data or service is returned.
  • —All documentation pages (docs, pricing, README, api) returned only 'Connect wallet' with no usable content.
  • —No OpenAPI spec, no example responses, and no input schema beyond 'POST with JSON'.
  • —The specific endpoint path '/api/v1/transfers/61' does not appear in the site's listed API catalog, raising questions about its purpose.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 14:17:26Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

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