x402basequality 0.25

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/145

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/145` 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 uniformly priced at $0.02 per request.

However, the specific functionality behind `/api/v1/transfers/145` is not documented beyond the label "Premium API Access." The crawled docs, pricing, and README pages all returned only a "Connect wallet" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no detailed documentation available for this or any other endpoint on the platform. The endpoint is confirmed live (402 challenge captured), but what it actually returns after payment is unknown.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyno-rate-limithttp-post

Use cases

  • —Accessing a premium API endpoint with per-request USDC micropayments on Base
  • —Integrating x402-compatible agents that pay for API calls without 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-per-call API access on Base
  • —Projects wanting to avoid subscription commitments for API usage

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before paying
  • —Anyone without a Base-network USDC wallet or x402-compatible client
  • —Production workloads requiring well-documented, schema-validated endpoints

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transfers/145 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transfers/145
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is confirmed live via a valid 402 challenge, but there is zero documentation on what the endpoint actually does or returns. No OpenAPI schema, no request/response examples, and the docs pages are empty. The label 'Premium API Access' is generic and uninformative. This is effectively a stub listing.

Warnings

  • —No documentation available — docs, pricing, and README pages all return only 'Connect wallet' with no content.
  • —The specific functionality of /api/v1/transfers/145 ('Premium API Access') is completely undocumented.
  • —No OpenAPI schema or request/response examples are available for any endpoint on the platform.
  • —Cannot verify what data or service is returned after successful payment.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 14:07:53Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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