Premium API subscription access via x402 payment on Base network using USDC.
What it does
This endpoint at lowpaymentfee.com provides a "Premium API Access" subscription tier, accessible via the x402 payment protocol on the Base network. The endpoint is located at `/api/v1/stripe/subscriptions/150` and accepts POST requests with payment settled in USDC (USD Coin) on Base. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request.
The broader lowpaymentfee.com platform offers a suite of pay-per-request APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are advertised at $0.02 per request with no API keys, no rate limits, and instant access via x402 payment headers.
The specific subscription endpoint's behavior beyond payment acceptance is unclear — the crawled documentation pages only show a "Connect wallet" prompt with no further detail on what the subscription grants or how it differs from per-request access. No OpenAPI schema, request/response examples, or detailed documentation were found.
Capabilities
Use cases
- —Purchasing premium subscription access to lowpaymentfee.com APIs via on-chain USDC payment
- —Programmatic subscription management for AI agents that need recurring API access
- —Enabling wallet-based authentication and payment for API services without traditional API keys
Fit
Best for
- —Agents or services that already hold USDC on Base and want frictionless API access
- —Developers seeking pay-as-you-go API access without signup or key management
- —Crypto-native applications needing low-cost per-request API calls
Not for
- —Users who need detailed documentation or guaranteed SLAs before purchasing
- —Applications requiring fiat-only payment rails with no crypto involvement
- —High-volume consumers who need bulk pricing or enterprise contracts
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/150 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_header>"Endpoint
Quality
The endpoint is live (returns 402 challenge) and pricing is clear ($0.02 USDC on Base), but there is no documentation on what the subscription endpoint actually returns, no request/response schema, and the docs pages are empty beyond a wallet connect prompt. Effectively a stub listing.
Warnings
- —No documentation available — all doc pages only show 'Connect wallet' with no content
- —No request or response schema provided for this subscription endpoint
- —Unclear what 'Premium API Access' subscription grants vs. per-request endpoints
- —No OpenAPI spec or AI plugin manifest found
Citations
- —Endpoint returns 402 with x402 challenge requiring USDC payment on Base networkhttps://lowpaymentfee.com/api/v1/stripe/subscriptions/150
- —Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/stripe/subscriptions/150