x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/payments/245

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/245` is labeled "Premium API Access" and charges up to $0.02 per call (20,000 base units of USDC with 6 decimals). No API keys, accounts, or rate limits are advertised — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The broader platform advertises multiple API categories including 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, the specific functionality behind the `/api/v1/payments/245` endpoint is not documented beyond its "Premium API Access" label.

Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional technical content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled material. The endpoint is confirmed live via a valid 402 challenge, but what it actually returns upon successful payment is unknown.

Capabilities

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

Use cases

  • —Accessing a premium API endpoint with per-request USDC micropayments on Base
  • —Integrating pay-as-you-go API calls into agent workflows without managing API keys
  • —Testing x402 protocol payment flows against a live endpoint

Fit

Best for

  • —Developers wanting zero-signup, pay-per-call API access
  • —AI agents that can settle x402 payments autonomously on Base
  • —Projects needing low-cost ($0.02) per-request pricing without subscriptions

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —Anyone without a Base-network USDC wallet or x402-compatible client
  • —High-volume use cases where per-request crypto settlement overhead matters

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/245 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/245
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live via a valid 402 challenge, but there is zero documentation on what the endpoint actually does or returns. No OpenAPI spec, no request/response schemas, no examples. The docs pages are empty beyond a wallet-connect prompt. The 'Premium API Access' label is generic and uninformative.

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/245 is completely undocumented; 'Premium API Access' is the only descriptor
  • —No request or response schema is provided; callers cannot know what to send or what to expect back
  • —The platform lists many API categories (AI, finance, data, etc.) but none are documented with specs or examples

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 06:52:17Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/TUC7B3
Pay-per-call API platform on Base (USDC) via x402 — $0.02/request, no API keys required. — Clawmart · Clawmart