x402basequality 0.30

Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/payments/32

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It is one of many endpoints offered by the provider, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, payable in USDC on the Base network with no API keys, rate limits, or commitments required.

The specific endpoint `/api/v1/payments/32` returns a valid x402 challenge (HTTP 402) advertising an exact-payment scheme. The max amount required is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The endpoint accepts POST requests and returns application/json.

While the provider's landing page lists a broad catalog of APIs (metrics, reports, sentiment analysis, summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and generation), the specific functionality behind the `/api/v1/payments/32` path is not documented beyond the label "Premium API Access." No OpenAPI spec, detailed request/response schemas, or usage documentation were found in the crawl. The docs, API, pricing, and README pages all rendered only a "Connect wallet" prompt with no additional content.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyjson-responsepost-method

Use cases

  • —Programmatic access to premium API services without traditional API key management
  • —Agent-driven workflows that need on-demand, pay-as-you-go API calls settled in USDC
  • —Integrating crypto-native micropayments into data or utility pipelines

Fit

Best for

  • —Developers wanting zero-signup, pay-per-use API access
  • —AI agents with USDC wallets on Base that need low-friction endpoint access
  • —Projects exploring x402 protocol integration at low cost ($0.02/call)

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscription plans

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/32 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/32
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a label, and the specific functionality of /api/v1/payments/32 is entirely undocumented. The crawled docs/pricing/README pages were empty beyond a wallet-connect prompt.

Warnings

  • —The specific functionality of /api/v1/payments/32 ('Premium API Access') is not documented — it is unclear what data or service it returns.
  • —No OpenAPI specification or request/response schema is available.
  • —All documentation pages (docs, API, pricing, README) returned only 'Connect wallet' with no usable content.
  • —The broad catalog of endpoints listed on the homepage could not be verified for functionality.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 07:08:52Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/gxgJ6C
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart