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 part of a broader platform offering dozens of pay-per-request API endpoints spanning data & analytics, AI/ML (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints on the platform are priced at $0.02 per request and settle on the Base network using USDC.
This specific endpoint (/api/v1/stripe/subscriptions/189) is labeled "Premium API Access" and carries a maximum charge of $0.02 per call (20,000 base units of USDC with 6 decimals). Payment is made via the x402 protocol's "exact" scheme: the caller includes an X-PAYMENT header with a signed payment authorization, and the server verifies and settles on Base before returning the response. No API keys, rate limits, or upfront commitments are required.
However, the actual functionality behind this particular endpoint is unclear. The path suggests it may relate to Stripe subscription management, but the crawled documentation is extremely sparse — most pages only show a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed documentation describing what this endpoint accepts or returns. The platform's landing page lists many other endpoints but does not specifically describe this one. Treat this listing as a stub until more documentation becomes available.
Capabilities
Use cases
- —Accessing premium API functionality with per-call USDC micropayments on Base
- —Agent-driven API consumption without pre-registration or API keys
- —Programmatic subscription or premium resource access 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 crypto micropayments over traditional subscription billing
Not for
- —Users needing detailed API documentation or OpenAPI specs before integrating
- —Applications requiring high-throughput, free-tier access
- —Users without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/189 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-signed-payment-header>"Endpoint
Quality
The endpoint is live (returns a valid x402 402 challenge), but there is no OpenAPI schema, no request/response examples, and no meaningful documentation beyond the landing page. The specific functionality of this endpoint ('/stripe/subscriptions/189') is not described anywhere in the crawled material. This is effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —The endpoint path suggests Stripe subscription management but no details are documented
- —All documentation pages beyond the landing page returned only 'Connect wallet' with no content
- —Actual request body format and response structure are unknown
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/subscriptions/189
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/subscriptions/189