x402basequality 0.35

Pay-per-call API platform on Base network via x402 — $0.02/request, no API keys required.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/150

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints are paid per-request using USDC on the Base network at a uniform price of $0.02 per call, with no API keys, rate limits, or subscription commitments required.

The specific endpoint at `/api/v1/charges/150` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02, since USDC uses 6 decimals) on Base. Payment is made via the x402 exact scheme, settling to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. The endpoint accepts POST requests and returns `application/json`.

The broader platform advertises categories including: metrics and reports APIs, data export and insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation utilities. However, documentation beyond the landing page is essentially empty (all sub-pages only show "Connect wallet"), so the actual behavior, request schemas, and response formats for individual endpoints are undocumented. Without concrete input/output schemas or example payloads, it is difficult to assess what data or functionality this specific endpoint actually provides.

Capabilities

x402-paymentper-request-pricingusdc-baseno-api-keyjson-responsepost-method

Use cases

  • —Agents that need on-demand API access without managing API keys or subscriptions
  • —Programmatic access to data analytics, AI inference, or financial data with crypto micropayments
  • —Testing x402 payment flows on the Base network

Fit

Best for

  • —Developers wanting zero-friction, keyless API access via crypto micropayments
  • —AI agents with USDC on Base that need diverse utility endpoints
  • —Prototyping x402-based pay-per-call integrations

Not for

  • —Users who need detailed API documentation and guaranteed SLAs
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Users without USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/150 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/150
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, documentation is effectively nonexistent — all doc/pricing/API pages render only 'Connect wallet' with no schema, examples, or explanation of what the endpoint actually returns. The 'Premium API Access' label is generic and uninformative.

Warnings

  • —No documentation available — all sub-pages (docs, api, pricing, README) show only 'Connect wallet' with no content.
  • —No input or output schema provided for this endpoint; actual functionality is unknown.
  • —The endpoint name 'Premium API Access' and path '/api/v1/charges/150' do not clearly indicate what data or service is returned.
  • —This endpoint does not appear in the landing page's listed API catalog, raising questions about its purpose.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:16:59Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/kDQHhP
Pay-per-call API platform on Base network via x402 — $0.02/request, no API keys required. — Clawmart · Clawmart