Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.
What it does
lowpaymentfee.com hosts a collection of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. The specific endpoint `/api/endpoint-47` is labeled "Premium API Access" and accepts POST requests, settling payments in USDC (contract 0x8335…2913 on Base). The x402 challenge indicates a maximum amount of 20,000 base units, which at 6 decimals for USDC equals $0.02 per request.
The broader platform advertises 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 listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.
However, this specific endpoint (`/api/endpoint-47`) does not correspond to any of the named endpoints on the landing page, and no documentation, request/response schemas, or examples are available. The docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content. Without knowing what `/api/endpoint-47` actually does or what input it expects, practical usage is speculative.
Capabilities
Use cases
- —Programmatic access to paid API services without traditional API key registration
- —Agent-driven workflows that need instant, keyless API access settled in USDC on Base
- —Exploring x402 payment protocol integrations for micropayment-gated endpoints
Fit
Best for
- —Developers experimenting with x402 payment-gated APIs
- —Agents with USDC on Base that need low-friction API access
- —Projects wanting to avoid API key management and subscriptions
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —Anyone without a Base-compatible USDC wallet
- —Production workloads requiring well-documented, schema-validated endpoints
Quick start
curl -X POST https://lowpaymentfee.com/api/endpoint-47 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and the endpoint path does not match any named service on the site. Docs pages are empty. Effectively a stub listing.
Warnings
- —Endpoint /api/endpoint-47 does not match any named endpoint on the provider's landing page — its actual functionality is unknown.
- —All documentation pages (docs, API, pricing, README) returned only 'Connect wallet' with no substantive content.
- —No request or response schema is available; callers cannot know what input to send or what output to expect.
- —No OpenAPI spec or ai-plugin manifest found.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 in USDC (6 decimals) on Base, equaling $0.02 per request.https://lowpaymentfee.com/api/endpoint-47
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/endpoint-47
- —Docs, API, pricing, and README pages all returned only 'Connect wallet' with no documentation content.https://lowpaymentfee.com/docs