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. The specific resource `/api/v1/item/23` is one of many endpoints offered by the platform, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints are priced at $0.02 per request, paid in USDC on the Base network with no API keys, rate limits, or commitments required.
The x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract 0x8335…2913 on Base). The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. Payment is made via the `exact` scheme with a 300-second timeout. The response MIME type is `application/json`.
While the platform advertises a broad suite of endpoints (metrics, reports, sentiment analysis, summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, and more), the specific functionality of `/api/v1/item/23` is not documented beyond the generic label "Premium API Access." No OpenAPI schema, request/response examples, or detailed documentation 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 premium data or services without API key registration
- —Making one-off paid API calls settled in USDC on Base
- —Integrating pay-per-request endpoints into agent workflows
Fit
Best for
- —Developers who want instant API access without signup or API keys
- —Agents that can settle x402 payments in USDC on Base
- —Use cases requiring low-cost per-request pricing ($0.02)
Not for
- —Users who need detailed documentation or OpenAPI specs before integrating
- —Anyone without a Base-compatible USDC wallet
- —High-volume use cases where subscription pricing would be cheaper
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/item/23 \
-H "Content-Type: application/json"
# Returns 402 with x402 payment challenge; attach X-PAYMENT header with signed USDC payment to access.Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing. However, the specific functionality of /api/v1/item/23 is completely undocumented — no schema, no examples, no description beyond the generic 'Premium API Access' label. All documentation pages returned only 'Connect wallet' with no content. This is effectively a stub listing.
Warnings
- —The specific functionality of /api/v1/item/23 is unknown — 'Premium API Access' is a generic label with no further documentation.
- —No OpenAPI schema, request body format, or response examples are available.
- —All documentation pages (docs, API, pricing, README) returned only a 'Connect wallet' prompt with no substantive content.
- —The platform lists many endpoints but none have detailed documentation visible in the crawl.
Citations
- —Endpoint returns 402 with x402 challenge, maxAmountRequired 20000 USDC base units on Base networkhttps://lowpaymentfee.com/api/v1/item/23
- —All endpoints priced at $0.02/request with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/item/23