x402-gated premium API endpoint on Base, pay $0.02 per 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 — all gated via the x402 payment protocol on the Base network. The specific endpoint `/api/v1/claims/61` is labeled "Premium API Access" but its exact functionality is not documented beyond that label. The platform advertises uniform $0.02-per-request pricing with no API keys, no rate limits, and instant access.
The x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract 0x8335…2913 on Base). The maxAmountRequired of 20000 base units corresponds to $0.02 (USDC uses 6 decimals), consistent with the site's advertised pricing. Payment is made via the x402 "exact" scheme with a 300-second timeout. No OpenAPI schema, detailed documentation, or example responses were found for this specific endpoint — the docs, pricing, and API pages all render only a wallet-connect prompt with no additional content.
The platform hosts numerous other endpoints covering sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, and more, all at the same $0.02 price point. However, without documentation or response schemas for `/api/v1/claims/61` specifically, it is unclear what data or service this endpoint returns.
Capabilities
Use cases
- —Accessing a premium data or service endpoint with per-request USDC micropayments
- —Integrating x402-compatible agents that pay per API call without pre-registration
- —Testing x402 payment flows on Base network
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents needing keyless, pay-per-request API access on Base
- —Low-volume consumers who prefer no subscription commitments
Not for
- —Users who need detailed API documentation or response schemas before integrating
- —High-volume use cases where per-request pricing may add up without bulk discounts
- —Anyone requiring non-crypto payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/claims/61 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documentation, no OpenAPI schema, no response examples, and the purpose of '/api/v1/claims/61' is entirely opaque beyond the generic label 'Premium API Access'. The docs/pricing/API pages all render only a wallet-connect prompt with no useful content.
Warnings
- —The specific functionality of /api/v1/claims/61 is undocumented — 'Premium API Access' is the only description available.
- —No OpenAPI spec, response schema, or example responses were found for any endpoint on this platform.
- —All documentation pages (docs, pricing, API, README) render only a wallet-connect prompt with no substantive content.
- —The platform lists many endpoint categories (AI, finance, analytics, etc.) but none have visible documentation — actual service quality is unverifiable.
Citations
- —Endpoint returns 402 with x402 challenge, maxAmountRequired 20000 USDC base units on Base networkhttps://lowpaymentfee.com/api/v1/claims/61
- —Platform advertises $0.02 per request pricing with no API keys, no rate limits, instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/claims/61
- —Platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com