x402-gated premium API endpoint on Base, paying per-call in USDC.
What it does
This endpoint at lowpaymentfee.com is one of many x402-protocol-gated API endpoints offered by the platform. The specific resource `/api/v1/stripe/charges/136` is labeled "Premium API Access" and accepts POST requests, settling payments in USDC on the Base network. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0.02 USD per request, since USDC uses 6 decimals). No API keys or rate limits are required; callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The broader lowpaymentfee.com platform lists endpoints across four categories: 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 (geocoding, validation, conversion, generation). All endpoints are uniformly priced at $0.02 per request.
However, the specific functionality behind this particular endpoint (`/api/v1/stripe/charges/136`) is unclear. The path suggests it may relate to Stripe charge operations, but no documentation, request schema, or response schema is available. The docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content. Without knowing what this endpoint actually returns or accepts in its POST body, callers should treat this as an exploratory integration.
Capabilities
Use cases
- —Programmatic access to a premium API resource with per-call USDC micropayments
- —Agent-driven workflows that need keyless, pay-as-you-go API access on Base
- —Exploring x402 protocol integrations with low per-request costs
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents that can sign USDC payments on Base
- —Use cases requiring no-signup, no-API-key access
Not for
- —Users who need detailed API documentation before integrating
- —High-volume use cases where $0.02/request adds up without bulk discounts
- —Anyone needing fiat-only payment rails
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/136 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02/request in USDC on Base), but there is no documentation, no request/response schema, and no explanation of what this specific endpoint actually does. The docs pages are empty. This is effectively a stub listing.
Warnings
- —No documentation available — docs, API, pricing, and README pages all return only a 'Connect wallet' prompt with no content.
- —The specific functionality of /api/v1/stripe/charges/136 is unknown; the path suggests Stripe charge operations but nothing is confirmed.
- —No request body schema or response schema is provided anywhere.
- —No OpenAPI spec or AI plugin manifest found.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/stripe/charges/136
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform 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/stripe/charges/136