x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 paywall on the Base network. The specific resource `/api/v1/claims/71` is one of many endpoints offered by the provider, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, settled in USDC on Base with no API keys, rate limits, or commitments required.
The x402 challenge confirms the endpoint is live and accepts POST requests. Payment is made via the x402 "exact" scheme to wallet `0x1A2B...85F3`, with a max amount of 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals). The response MIME type is `application/json`. The provider's 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 the same $0.02 price point.
Note that the specific functionality behind `/api/v1/claims/71` is not documented beyond the generic label "Premium API Access." The provider's docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further technical documentation. Without an OpenAPI spec, request/response schemas, or usage examples, the exact input parameters and output format for this particular endpoint remain unknown.
Capabilities
Use cases
- —Agents needing on-demand API access without pre-registration or API keys
- —Micropayment-gated data retrieval settled in USDC on Base
- —Programmatic access to premium content behind x402 paywalls
Fit
Best for
- —AI agents with x402-compatible wallets on Base
- —Developers testing x402 payment flows at low cost
- —Use cases requiring keyless, per-request API billing
Not for
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —High-volume consumers who prefer subscription or bulk pricing
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/claims/71 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the specific purpose of /api/v1/claims/71 is entirely opaque. This is effectively a stub listing.
Warnings
- —The specific functionality of /api/v1/claims/71 is undocumented — 'Premium API Access' is a generic label with no further detail.
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no technical content.
- —No OpenAPI spec, request schema, or response schema is available.
- —The provider lists many endpoints but none have publicly visible documentation explaining inputs or outputs.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/claims/71
- —All endpoints are priced at $0.02 per request with no API keys, rate limits, or commitmentshttps://lowpaymentfee.com
- —The provider offers endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/claims/71