x402-gated premium API access on Base, paid per-call in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 paywall. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints use the x402 protocol on the Base network, accepting USDC payments with no API keys, no rate limits, and no commitments required.
The specific endpoint `/api/v1/stripe/subscriptions/56` is listed as "Premium API Access" and costs up to $0.02 per request (maxAmountRequired of 20,000 base units of USDC, which is 6 decimals = $0.02). It accepts POST requests and returns application/json. The payment is settled on-chain on Base to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using the USDC contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.
Documentation is extremely sparse — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no additional content. The exact functionality behind this particular "Premium API Access" endpoint is unclear from available materials. The endpoint path suggests it may relate to Stripe subscription management, but no schema, request/response examples, or detailed documentation are available to confirm this.
Capabilities
Use cases
- —Accessing a premium API endpoint with per-call USDC micropayments on Base
- —Agent-driven API consumption without pre-registration or API keys
- —Programmatic access to subscription-related functionality via x402 protocol
Fit
Best for
- —Developers wanting keyless, pay-per-use API access
- —AI agents that can settle x402 payments autonomously on Base
- —Users who prefer on-chain micropayments over traditional billing
Not for
- —Users needing detailed API documentation before committing
- —Applications requiring free or fiat-only payment methods
- —High-volume use cases where per-call pricing may add up without volume discounts
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/56 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and the actual functionality of this specific endpoint is unclear. The path suggests Stripe subscription management but this is unconfirmed.
Warnings
- —Documentation pages (docs, pricing, API, README) all render only 'Connect wallet' with no usable content
- —The exact functionality of this 'Premium API Access' endpoint is unknown — the path '/api/v1/stripe/subscriptions/56' hints at Stripe subscription management but no details are available
- —No request or response schema is documented
- —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/subscriptions/56
- —The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC contract address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/subscriptions/56
- —Documentation, pricing, API, and README pages all show only 'Connect wallet'https://lowpaymentfee.com/docs