x402-gated premium API access on Base, pay $0.02 per request in USDC — no keys, no rate limits.
What it does
This endpoint at lowpaymentfee.com is part of a broader platform offering pay-per-call APIs across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all gated via the x402 payment protocol on the Base network. The specific endpoint `/api/v1/wire/193` is listed as "Premium API Access" but its exact functionality is not documented beyond that label. The platform advertises a flat $0.02 per request pricing model with no API keys, no rate limits, and instant access.
Payment is settled in USDC (contract `0x8335...2913` on Base) using the x402 exact-payment scheme. The probe confirmed a live 402 challenge with `maxAmountRequired` of 20,000 base units, which at 6 decimals equals $0.02 — consistent with the site's advertised pricing. The endpoint accepts HTTP POST requests and returns `application/json` responses. No OpenAPI schema, detailed documentation, or example request/response payloads were found in the crawl; the docs, pricing, API, and README pages all rendered only a "Connect wallet" prompt with no substantive content.
Because the endpoint's actual functionality behind the paywall is undocumented and the label "Premium API Access" is generic, agents should treat this as an opaque paid endpoint until further documentation is available. The platform hosts many other endpoints (sentiment analysis, summarization, geocoding, price feeds, etc.) at the same price point, suggesting a marketplace-style offering.
Capabilities
Use cases
- —Programmatic access to a premium API endpoint with per-call USDC micropayments
- —Agent-driven workflows that need keyless, rate-limit-free API access on Base
- —Testing x402 payment protocol integrations against a live endpoint
Fit
Best for
- —Developers exploring x402 payment-gated APIs
- —Agents that can settle USDC payments on Base L2
- —Use cases requiring no-signup, pay-as-you-go API access
Not for
- —Users who need detailed API documentation or schemas before purchasing
- —Applications requiring free or subscription-based access models
- —Non-crypto workflows that cannot settle on-chain payments
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/193 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge with clear pricing, but the actual functionality behind "Premium API Access" is completely undocumented. No OpenAPI schema, no example requests/responses, and all documentation pages render only a wallet-connect prompt. The listing is effectively a stub.
Warnings
- —Endpoint functionality is undocumented — 'Premium API Access' is a generic label with no specification of what data or service is returned after payment.
- —All documentation pages (/docs, /pricing, /api, /README) returned only a 'Connect wallet' prompt with no substantive content.
- —No OpenAPI schema or request/response examples are available; callers cannot know what to send or expect back without paying first.
Citations
- —The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The x402 challenge returns maxAmountRequired of 20000 base units in USDC (6 decimals) = $0.02, settling on Base.https://lowpaymentfee.com/api/v1/wire/193
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/wire/193
- —The platform lists endpoints across data/analytics, AI/ML, finance/Web3, and infrastructure categories.https://lowpaymentfee.com