x402-gated premium API access on Base, paid per-call in USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 paywall, settling payments in USDC on the Base network. The specific endpoint `/api/v1/stripe/charges/85` is one of many offered by the provider, which hosts a broad catalog of pay-per-call APIs spanning data & analytics, AI & machine learning (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation).
The x402 challenge confirms the endpoint is live and accepts POST requests. The max amount required is 20,000 base units of USDC (0x8335… on Base), which equals $0.02 per request. The provider advertises a uniform $0.02/request pricing across all endpoints, with no API keys, no rate limits, and no minimum commitments required. Payment is made inline via the X-PAYMENT header using the x402 exact scheme.
However, the specific functionality behind this particular endpoint (`/stripe/charges/85`) is unclear. The path suggests it may relate to Stripe charge operations, but no documentation, request schema, or response schema is available beyond the generic "Premium API Access" description. The docs, pricing, and API pages all returned only a "Connect wallet" prompt with no substantive content. Without knowing what this endpoint actually does or what request body it expects, agents should treat this as an opaque pay-per-call endpoint until more documentation surfaces.
Capabilities
Use cases
- —Paying per-call for API access without needing API keys or subscriptions
- —Programmatic USDC micropayments for on-demand data or services
- —Agent-driven API consumption with inline x402 payment
Fit
Best for
- —Developers wanting zero-signup, pay-as-you-go API access
- —AI agents that can settle x402 payments in USDC on Base
- —Low-volume or sporadic API consumers who don't want subscriptions
Not for
- —Users needing detailed documentation or guaranteed SLAs before calling
- —High-volume consumers who would benefit from bulk pricing or rate agreements
- —Anyone who needs to understand the exact request/response schema before paying
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/85 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, and the actual functionality of /api/v1/stripe/charges/85 is unknown. Docs pages returned only 'Connect wallet' with no content.
Warnings
- —The specific functionality of /api/v1/stripe/charges/85 is undocumented and unclear from available materials.
- —No request body schema or response schema is available; callers cannot know what to send or expect back.
- —All documentation pages (docs, pricing, API, README) returned only a 'Connect wallet' prompt with no substantive content.
- —The endpoint path references 'stripe/charges' which may imply financial operations — exercise caution.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC (6 decimals) = $0.02 on Base networkhttps://lowpaymentfee.com/api/v1/stripe/charges/85
- —The provider advertises $0.02/request uniform pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/stripe/charges/85
- —Documentation pages returned only 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs