Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints on the platform are priced at $0.02 per request, payable in USDC on the Base network with no API keys, rate limits, or commitments required.
The specific endpoint `/api/v1/payments/184` is labeled "Premium API Access" in the x402 challenge. The challenge confirms it accepts exact-scheme payments on Base, with a maxAmountRequired of 20,000 base units of USDC (0x8335…), which equals $0.02 (USDC uses 6 decimals). Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, with a 300-second timeout. The endpoint accepts POST requests and returns application/json.
However, the exact functionality behind this particular endpoint path (`/payments/184`) is unclear. The platform's landing page lists many specific API endpoints (analytics, AI, finance, utilities), but `/api/v1/payments/184` is not among them. It may be a generic or dynamically generated payment resource. No OpenAPI schema, detailed documentation, or example request/response bodies were found in the crawl. The docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content.
Capabilities
Use cases
- —Accessing paid API endpoints without API key registration
- —Making micropayment-gated API calls using USDC on Base
- —Agent-driven programmatic access to premium data or services
Fit
Best for
- —Developers wanting zero-signup API access with crypto micropayments
- —AI agents that can settle x402 payments autonomously
- —Users who prefer pay-per-use over subscription models
Not for
- —Users who need detailed API documentation or schemas before integrating
- —Anyone without a Base-compatible USDC wallet
- —Use cases requiring free or fiat-only payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/payments/184 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no documentation, no OpenAPI schema, no example requests or responses, and the specific functionality of /api/v1/payments/184 is not described anywhere in the crawled material. The docs pages are empty beyond a wallet-connect prompt.
Warnings
- —The exact functionality of /api/v1/payments/184 is not documented — it does not appear in the platform's listed API catalog.
- —No OpenAPI spec, request schema, or response schema is available.
- —All documentation pages (docs, API, pricing, README) returned only a 'Connect wallet' prompt with no substantive content.
- —The purpose of this specific endpoint versus the platform's other listed endpoints is unclear.
Citations
- —The platform lists APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure, all priced at $0.02/request.https://lowpaymentfee.com
- —Pricing is $0.02 per request with no API keys, no rate limits, instant access on Base network.https://lowpaymentfee.com
- —x402 challenge confirms maxAmountRequired of 20000 base units of USDC on Base with 300-second timeout.https://lowpaymentfee.com/api/v1/payments/184