Pay-per-call premium API endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This x402-enabled endpoint at lowpaymentfee.com provides a "Premium API Access" service accessible via HTTP POST with per-request payment in USDC on the Base network. The endpoint returns a 402 Payment Required challenge advertising a maximum cost of 20,000 base units of USDC (0.02 USD per request, since USDC uses 6 decimals). Payment is made via the x402 exact scheme with no API keys, rate limits, or subscriptions required.
The broader lowpaymentfee.com platform advertises multiple API categories including 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 priced at $0.02 per request. However, this specific endpoint (/api/endpoint-86) does not correspond to any of the named endpoints listed on the site, and no documentation describes what it actually returns. The docs, pricing, and API pages all render only a "Connect wallet" prompt with no further content.
Without an OpenAPI schema, example responses, or documentation for this specific endpoint, it is unclear what data or functionality /api/endpoint-86 provides. The endpoint is confirmed live (402 challenge captured), but the lack of any output schema or documentation beyond the generic title "Premium API Access" makes it difficult to assess its practical utility.
Capabilities
Use cases
- —Programmatic access to a premium API service with per-call USDC micropayments
- —Agent-driven workflows that need keyless, pay-as-you-go API access on Base
- —Testing x402 payment flows against a live endpoint
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents that can settle USDC payments on Base L2
- —Use cases requiring no-signup, no-rate-limit API access
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —Anyone requiring a known, well-documented API output format
Quick start
curl -X POST https://lowpaymentfee.com/api/endpoint-86
# Returns 402 with x402 payment challenge.
# Include X-PAYMENT header with a valid x402 payment proof to access the resource.Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, but there is no documentation, no OpenAPI schema, no example responses, and the endpoint path (/api/endpoint-86) does not match any of the named endpoints on the site. It is essentially a stub listing with confirmed liveness but unknown functionality.
Warnings
- —No documentation exists for /api/endpoint-86 specifically — it does not appear in the site's listed endpoints
- —No OpenAPI or output schema available; response format is unknown
- —Docs, pricing, and API pages render only 'Connect wallet' with no usable content
- —The actual functionality behind this endpoint is unverifiable from available materials
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/endpoint-86
- —The site advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/endpoint-86