Pay-per-call premium API access on Base via x402, settled in USDC at $0.02/request.
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 collection of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints on the platform share a uniform $0.02-per-request pricing model, payable in USDC on the Base network with no API keys, rate limits, or commitments required.
The specific endpoint `/api/v1/payments/118` is labeled "Premium API Access" in the x402 challenge. The challenge confirms it accepts POST requests, settles in USDC (contract 0x8335…2913 on Base), and requires a maximum of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The payment timeout is 300 seconds. However, the exact functionality behind this particular endpoint path is not documented beyond its title — the platform's landing page lists other specific APIs (metrics, reports, sentiment analysis, summarization, etc.) but does not describe `/api/v1/payments/118` in detail.
No OpenAPI schema, detailed documentation, or example request/response payloads were found in the crawl. The docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content. Because of this, the actual input parameters and response format for this endpoint remain unknown. Agents should treat this as a live x402 endpoint with confirmed pricing but uncertain functionality.
Capabilities
Use cases
- —Programmatic access to a premium API resource with per-call USDC micropayments
- —Agent-driven workflows that need keyless, pay-as-you-go API access on Base
- —Testing x402 payment protocol integrations against a live endpoint
Fit
Best for
- —Developers experimenting with x402 payment flows
- —Agents that can settle USDC payments on Base L2
- —Use cases requiring no-signup, no-API-key access
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —Applications requiring known, well-documented input/output schemas
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/payments/118
# Returns 402 with x402 payment challenge.
# Attach X-PAYMENT header with a valid USDC payment proof on Base to access the resource.Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, the actual functionality behind '/api/v1/payments/118' is undocumented — no OpenAPI spec, no request/response examples, and all documentation pages are empty beyond a wallet-connect prompt. This is effectively a stub listing.
Warnings
- —The exact functionality of /api/v1/payments/118 is not described anywhere in the crawled content — 'Premium API Access' is the only label.
- —All documentation pages (docs, API, pricing, README) returned no substantive content, only a 'Connect wallet' prompt.
- —No OpenAPI schema or example payloads are available; input/output format is unknown.
- —The platform lists many other endpoints but this specific path does not appear among them.
Citations
- —The endpoint returns a 402 challenge requiring USDC payment on Base with maxAmountRequired of 20000 base units ($0.02).https://lowpaymentfee.com/api/v1/payments/118
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/payments/118
- —The platform offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categories.https://lowpaymentfee.com