x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com is part of a broader suite of x402-protocol APIs that gate access behind per-request USDC micropayments on the Base network. The specific resource `/api/v1/generate/resource/142` is listed as "Premium API Access" and returns `application/json` responses. The x402 challenge confirms it is live, accepting payments via the "exact" scheme to a specified wallet address, with a max amount of 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals).
The provider's landing page advertises a wide catalog of endpoints spanning data & analytics, AI & machine learning (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced uniformly at $0.02 per request with no API keys, no rate limits, and no commitments required. However, the specific functionality behind resource ID 142 is not documented beyond the generic "Premium API Access" label, and the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further technical detail.
Because there is no OpenAPI schema, no request/response examples, and no documentation describing what this particular resource actually does or what inputs it expects, agents should treat this as an opaque endpoint. The x402 payment flow itself is standard and functional, but the lack of documentation makes it difficult to use without experimentation.
Capabilities
Use cases
- —Paying per-request for API access without needing API keys or subscriptions
- —Integrating x402-compatible agents with a low-cost JSON endpoint on Base
- —Exploring x402 protocol payment flows in a live environment
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents that support x402 micropayments on Base
- —Low-cost per-call API consumption without signup
Not for
- —Users who need documented request/response schemas before integration
- —High-throughput production workloads requiring SLA guarantees
- —Anyone needing to understand exactly what the endpoint returns before paying
Quick start
# The endpoint returns 402 with an x402 challenge.
# An x402-compatible client handles payment automatically.
curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/142 \
-H 'Content-Type: application/json'Endpoint
Quality
The x402 challenge is live and well-formed, confirming the endpoint exists and accepts USDC on Base at $0.02/request. However, there is zero documentation on what this specific resource does, no request/response schema, no examples, and the docs pages are empty beyond a wallet-connect prompt. The listing is effectively a stub.
Warnings
- —No documentation exists for resource/142 — its actual functionality is unknown
- —All doc/pricing/API pages render only 'Connect wallet' with no technical content
- —No OpenAPI or output schema provided beyond basic HTTP method info
- —The endpoint's purpose cannot be verified without making a paid request
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/generate/resource/142
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, instant accesshttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/generate/resource/142