x402-gated premium API access on Base, paid per-call in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated behind x402 micropayments settled in USDC on the Base network.
The specific endpoint `/api/v1/stripe/subscriptions/67` is listed as "Premium API Access" and costs up to 0.02 USDC per request (maxAmountRequired of 20,000 base units with USDC's 6 decimals). Payment is made via the x402 exact scheme: callers include an X-PAYMENT header with a signed payment to the provider's address on Base. No API keys, rate limits, or upfront commitments are required — access is instant upon payment.
Documentation is extremely sparse. The crawled docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content. The endpoint's actual functionality behind the "Premium API Access" label is not documented — it is unclear what data or service is returned after payment. The POST method is specified in the outputSchema, and the response MIME type is application/json, but no request body schema or response schema is provided. Prospective users should test the endpoint to determine its actual behavior before relying on it in production.
Capabilities
Use cases
- —Accessing premium API services with per-request USDC micropayments on Base
- —Agent-driven API consumption without pre-registration or API keys
- —Testing x402 payment protocol integrations
Fit
Best for
- —Developers experimenting with x402 payment-gated APIs
- —Agents that can sign USDC payments on Base for per-call access
- —Users who want keyless, commitment-free API access
Not for
- —Users who need detailed API documentation or response schemas before integrating
- —Anyone without a Base-compatible wallet holding USDC
- —High-volume consumers who prefer subscription or bulk pricing
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/67 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <signed-x402-payment-header>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC per call), but there is no documentation of what the endpoint actually does, no request/response schema, and all doc pages return only 'Connect wallet'. The 'Premium API Access' label is opaque. This is effectively a stub listing.
Warnings
- —No documentation available — all doc/pricing/README pages return only 'Connect wallet'
- —The actual functionality behind 'Premium API Access' is completely undocumented
- —No request body schema or response schema provided
- —The endpoint path '/api/v1/stripe/subscriptions/67' suggests a Stripe subscription resource but its purpose is unclear
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/subscriptions/67
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/subscriptions/67