x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request.
What it does
lowpaymentfee.com hosts a collection of x402-protocol pay-per-request API endpoints on the Base network, settling payments in USDC. The specific endpoint `/api/v1/claims/88` is listed as "Premium API Access" and returns an x402 challenge requiring an exact payment of 20,000 base units of USDC (0.02 USD) per call. No API keys or rate limits are advertised — callers simply attach an X-PAYMENT header with a valid x402 payment proof to access the resource.
The broader platform advertises endpoints spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are uniformly priced at $0.02 per request. However, the specific endpoint `/api/v1/claims/88` does not clearly map to any of these named categories, and no documentation, request schema, or response schema is available for it. The docs, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content.
Without an OpenAPI spec, request/response examples, or detailed documentation, it is unclear what data or functionality this particular endpoint provides. The endpoint is confirmed live (402 challenge captured), but the lack of documentation makes it difficult to assess its actual utility.
Capabilities
Use cases
- —Accessing a premium data or service endpoint with per-request USDC micropayments
- —Agent-driven API consumption without pre-registration or API keys
- —Programmatic pay-as-you-go access to an x402-gated resource
Fit
Best for
- —Developers or agents wanting zero-signup, pay-per-call API access
- —x402-compatible wallets and agent frameworks on Base
- —Micropayment-based API consumption without subscriptions
Not for
- —Users needing detailed API documentation or guaranteed SLAs
- —Use cases requiring known, well-documented request/response schemas
- —Free or high-volume bulk access
Quick start
# The endpoint requires an x402 X-PAYMENT header with a valid payment proof.
# Using curl as an example (you need an x402-compatible client to generate the header):
curl -X POST https://lowpaymentfee.com/api/v1/claims/88 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the endpoint name 'claims/88' does not map to any documented functionality. This is effectively a stub listing.
Warnings
- —No documentation available — docs, pricing, and README pages all return only 'Connect wallet' with no content.
- —The endpoint path '/api/v1/claims/88' does not correspond to any of the named API categories on the landing page.
- —No request or response schema is provided; actual functionality is unknown.
- —No OpenAPI or AI plugin manifest found.
Citations
- —The endpoint returns a 402 challenge requiring 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network.https://lowpaymentfee.com/api/v1/claims/88
- —All endpoints are uniformly priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The platform advertises endpoints in Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories.https://lowpaymentfee.com