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/transactions/105

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad collection of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. Every endpoint costs $0.02 per request, paid in USDC on the Base network with no API keys, no rate limits, and no upfront commitments. The specific endpoint at `/api/v1/transactions/105` is listed as "Premium API Access" and returns `application/json` via POST.

The platform advertises four categories of APIs: 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 (geocoding, validation, conversion, generation). All endpoints use the x402 payment protocol, settling in USDC (contract `0x8335…2913`) on Base. The x402 challenge for this particular endpoint shows a `maxAmountRequired` of 20000 base units, which equals $0.02 given USDC's 6 decimals.

Documentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawl. The exact functionality behind the `/api/v1/transactions/105` path is unclear; the name "Premium API Access" is generic and does not describe a specific capability.

Capabilities

x402-paymentusdc-base-networkpay-per-requestjson-responseno-api-keypost-method

Use cases

  • —Accessing on-demand API services without subscription or API key management
  • —Making micropayment-gated API calls settled in USDC on Base
  • —Agent-driven workflows that need pay-as-you-go data or AI endpoints

Fit

Best for

  • —Developers wanting zero-commitment, pay-per-use API access
  • —AI agents that can settle x402 payments autonomously on Base
  • —Projects needing low-cost API calls without rate limits

Not for

  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —Applications requiring guaranteed SLAs or enterprise support
  • —Users without USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/105 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/105
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI spec, no request/response schemas, and no examples. The specific purpose of /api/v1/transactions/105 is unknown beyond the generic label "Premium API Access". All doc pages return only a wallet-connect prompt.

Warnings

  • —No documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet'
  • —No OpenAPI or schema definition found for any endpoint
  • —The specific functionality of /api/v1/transactions/105 ('Premium API Access') is undefined and unclear
  • —No request body schema or response schema documented anywhere
  • —Cannot verify what data or service is actually returned upon successful payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 12:01:34Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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