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/payments/215

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 at /api/v1/payments/215 is labeled "Premium API Access" and charges 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 — you 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 the same $0.02/request price point.

However, documentation is extremely thin. The /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no actual technical documentation, request/response schemas, or usage examples. The specific functionality behind the /api/v1/payments/215 endpoint is unclear — the description simply says "Premium API Access" without specifying what data or service it returns. Without schemas or sample responses, it is difficult to determine what this endpoint actually does.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyhttp-post

Use cases

  • —Accessing premium API services with per-request USDC micropayments
  • —Agent-driven API consumption without pre-registration or API keys
  • —Programmatic access to data, AI, finance, or utility endpoints via x402

Fit

Best for

  • —Developers wanting keyless, pay-as-you-go API access
  • —AI agents that can settle x402 payments on Base
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Users needing detailed API documentation or guaranteed SLAs
  • —Applications requiring free or fiat-only payment methods
  • —Production workloads that need well-documented request/response schemas

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/215 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/215
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 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, no request/response schema, no examples, and the actual functionality behind 'Premium API Access' is completely unspecified. The docs pages are empty stubs.

Warnings

  • —No documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content.
  • —The specific functionality of /api/v1/payments/215 ('Premium API Access') is not described anywhere.
  • —No request or response schemas are provided; impossible to know what inputs are expected or what outputs are returned.
  • —The platform lists many endpoint categories (AI, finance, data, etc.) but none have documented schemas or examples.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 06:46:51Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

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