Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories. The specific endpoint `/api/v1/claims/26` is labeled "Premium API Access" and is gated behind the x402 payment protocol on the Base network. Payment is settled in USDC (contract 0x8335…2913) at a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals).
The platform advertises a no-API-key, no-rate-limit model where callers pay per request with no minimums or commitments. The x402 challenge was successfully captured with version 1, confirming the endpoint is live. However, the specific functionality behind `/api/v1/claims/26` is not documented — the description simply says "Premium API Access" without detailing what data or service is returned. The site's docs, pricing, and API pages all render only a "Connect wallet" prompt with no additional technical documentation or schema information.
The broader platform lists endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at $0.02/request. Without documentation on what `/api/v1/claims/26` specifically returns or what input it expects, callers should treat this as an exploratory endpoint. The POST method is indicated in the outputSchema.
Capabilities
Use cases
- —Accessing premium API data without needing API keys or subscriptions
- —Making one-off paid API calls settled in USDC on Base
- —Integrating pay-per-request services into agent workflows
Fit
Best for
- —Developers who want keyless, pay-as-you-go API access
- —AI agents with x402-compatible payment capabilities
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Users needing detailed API documentation before calling
- —High-volume use cases where per-call pricing may add up
- —Users without USDC on the Base network
Quick start
# The endpoint requires an X-PAYMENT header with a valid x402 payment proof.
# Without payment, it returns a 402 challenge.
curl -X POST https://lowpaymentfee.com/api/v1/claims/26 \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, confirming pricing and payment details. However, there is no documentation on what the endpoint actually does, no request/response schema, and no examples. The docs pages are empty (wallet-connect only). The specific purpose of '/api/v1/claims/26' is unknown.
Warnings
- —The specific functionality of /api/v1/claims/26 is undocumented — 'Premium API Access' is the only description available.
- —All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no technical content.
- —No request body schema or response schema is provided; callers cannot know what to send or expect back.
- —No OpenAPI spec or AI plugin manifest is available.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/claims/26
- —Platform pricing is $0.02 per request with no API keys, no rate limits, no minimumshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/claims/26
- —The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com