x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request.
What it does
This endpoint at `/api/v1/claims/19` is part of the lowpaymentfee.com platform, which offers a suite of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. All endpoints are gated via the x402 payment protocol on the Base network, accepting USDC (contract 0x8335…2913) with no API keys, no rate limits, and no commitments required.
The specific `/api/v1/claims/19` endpoint is listed as "Premium API Access" but its exact functionality is not documented beyond that label. The x402 challenge confirms it is live, accepting POST requests, and requires a maximum payment of 20,000 base units of USDC (6 decimals), which equals $0.02 per request. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The response MIME type is application/json.
The broader platform advertises 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 the same $0.02/request price point. However, documentation pages (docs, pricing, README) all resolve to minimal "Connect wallet" content, so detailed request/response schemas and parameter documentation are unavailable.
Capabilities
Use cases
- —Accessing premium data or services without subscription or API key management
- —Agent-driven pay-per-call workflows using x402 protocol on Base
- —Programmatic access to a multi-category API suite (analytics, AI, finance, utilities)
Fit
Best for
- —Developers or agents wanting frictionless pay-per-request access without signup
- —x402-compatible agents that can settle USDC on Base
- —Low-volume or exploratory API usage where $0.02/call is cost-effective
Not for
- —Users needing detailed API documentation or guaranteed SLAs before integrating
- —High-volume production workloads where per-request pricing may add up
- —Users who cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/claims/19 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but the specific functionality of /api/v1/claims/19 is undocumented. No request/response schemas, no parameter docs, and all documentation pages are empty stubs showing only 'Connect wallet'. The listing is effectively a stub with confirmed liveness.
Warnings
- —The exact purpose and functionality of /api/v1/claims/19 ('Premium API Access') is not documented anywhere in the crawled material.
- —All documentation pages (/docs, /pricing, /README, /api) return only 'Connect wallet' with no actual content.
- —No request body schema or response schema is available — callers must guess at the expected input format.
- —The platform lists many endpoint categories but it is unclear whether they are all functional or placeholders.
Citations
- —Endpoint returns 402 with x402 challenge, confirming it is live on Base network accepting USDChttps://lowpaymentfee.com/api/v1/claims/19
- —maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02 per requesthttps://lowpaymentfee.com/api/v1/claims/19
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/claims/19
- —Documentation pages resolve to minimal 'Connect wallet' content with no substantive docshttps://lowpaymentfee.com/docs