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/90

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad set of endpoints across data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints are pay-per-request at $0.02 each, settled in USDC on the Base network. No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header to each request.

The specific endpoint at `/api/v1/transfers/90` is listed as "Premium API Access" and carries a max amount of 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) on Base. The x402 challenge was successfully captured, confirming the endpoint is live and accepting POST requests. The payment is settled to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using the USDC contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base.

The platform advertises categories including analytics/metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation. However, documentation pages (docs, pricing, README) returned only a "Connect wallet" prompt with no substantive content, so the actual behavior, input/output schemas, and data sources behind each endpoint remain undocumented and unverifiable.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keypost-methodjson-response

Use cases

  • —Agents that need on-demand API access without pre-registration or API keys
  • —Micropayment-gated data retrieval or utility calls
  • —Testing x402 payment flows on Base network

Fit

Best for

  • —Developers exploring x402 payment protocol integrations
  • —Agents needing keyless, pay-as-you-go API access on Base
  • —Low-friction one-off API calls without account setup

Not for

  • —Production workloads requiring documented input/output schemas and SLAs
  • —Users who need free or subscription-based API access
  • —Applications requiring high-throughput with predictable billing

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transfers/90 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transfers/90
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no documentation, no input/output schema, no examples, and the docs/pricing/README pages are all empty stubs. The actual functionality behind '/api/v1/transfers/90' is completely opaque — the name 'Premium API Access' is generic and uninformative.

Warnings

  • —Documentation pages (/docs, /pricing, /README) contain no content — only a 'Connect wallet' prompt.
  • —No input or output schema is available for this endpoint; actual behavior is unknown.
  • —The endpoint path '/api/v1/transfers/90' and description 'Premium API Access' are generic and do not clarify what data or service is provided.
  • —The platform lists many endpoint categories (AI, finance, analytics, etc.) but none are documented or verifiable.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 14:19:20Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/K5b8Ek
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart