x402-gated premium API endpoint on Base, pay-per-call with USDC.
What it does
This endpoint at lowpaymentfee.com is an x402-protocol pay-per-request API resource (resource ID 188) labeled "Premium API Access." It is part of a broader platform offering multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities — all gated behind x402 micropayments on the Base network.
The specific endpoint `/api/v1/generate/resource/188` accepts POST requests and returns `application/json` responses. Payment is settled in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base. The x402 challenge advertises a `maxAmountRequired` of 20,000 base units, which at 6 decimals for USDC equals $0.02 per request — consistent with the site's advertised flat pricing of $0.02/request across all endpoints. The payment timeout is 300 seconds.
The platform advertises no API keys, no rate limits, and instant access. However, documentation is extremely thin — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what "Premium API Access" or "resource/188" actually returns. The endpoint is confirmed live (402 challenge captured), but the lack of documentation makes it impossible to determine the actual functionality behind this specific resource ID.
Capabilities
Use cases
- —Agent-driven API consumption with automatic USDC micropayments
- —Accessing pay-per-use utility or generation endpoints without API keys
- —Programmatic resource generation via x402-gated POST requests
Fit
Best for
- —Developers wanting keyless, pay-per-call API access on Base
- —AI agents with x402-compatible wallets needing on-demand API calls
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Users who need detailed API documentation before integrating
- —Applications requiring guaranteed SLAs or support contracts
- —Users without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/188 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC per call). However, there is zero documentation on what this specific resource does, no request/response schema, no examples, and all doc pages render only 'Connect wallet'. The listing is effectively a stub.
Warnings
- —No documentation available — all doc/pricing/API pages show only 'Connect wallet'
- —Unknown functionality: 'Premium API Access' and 'resource/188' are not described anywhere
- —No OpenAPI schema or request/response examples available
- —No information on what input the POST body should contain or what the response looks like
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/generate/resource/188
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/generate/resource/188
- —The site offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com