x402basequality 0.35

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/124

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/124` 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 listed at $0.02 per request.

This particular endpoint (`/api/v1/transfers/124`) is labeled "Premium API Access" but its actual functionality is unclear — the crawled documentation pages returned only "Connect wallet" placeholders with no further detail on request/response schemas or what data the endpoint returns. The payment challenge confirms the endpoint is live and accepting POST requests, settling in USDC on Base to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keypost-endpointjson-response

Use cases

  • —Programmatic access to premium API data without managing API keys or subscriptions
  • —Agent-driven workflows that need on-demand paid API calls settled in USDC on Base
  • —Testing x402 protocol integrations with a low-cost live endpoint

Fit

Best for

  • —Developers exploring x402 pay-per-call patterns
  • —AI agents that need keyless, instant API access
  • —Users who want to avoid subscription commitments for occasional API calls

Not for

  • —Users who need detailed documentation or well-defined response schemas before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscription plans

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transfers/124 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transfers/124
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming it accepts USDC on Base at $0.02/request. However, there is no documentation on what the endpoint actually does, no request/response schema, and the docs/pricing/README pages all returned only 'Connect wallet' with no content. The endpoint path '/api/v1/transfers/124' with description 'Premium API Access' is too vague to determine functionality.

Warnings

  • —No documentation available — all doc pages returned only 'Connect wallet' placeholder content
  • —The specific functionality of /api/v1/transfers/124 is unknown; 'Premium API Access' is not descriptive
  • —No request or response schema is provided beyond the x402 outputSchema stub
  • —The endpoint path suggests a specific resource ID (124), which may not be generalizable

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 13:51:43Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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