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 resource path `/api/v1/stripe/charges/102` suggests a Stripe-related charges endpoint, though the crawled documentation does not describe this particular route in detail — the site's landing page lists various API categories (data & analytics, AI & ML, finance & Web3, infrastructure utilities) all priced at $0.02 per request.
The x402 challenge confirms the endpoint is live, accepting POST requests and requiring an exact-scheme payment of up to 20,000 base units of USDC (0x8335…on Base), which equals $0.02 USD (USDC uses 6 decimals). Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. No API keys or rate limits are advertised; access is granted purely via the x402 payment header.
Documentation beyond the landing page is extremely thin — the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no additional technical content. There is no OpenAPI spec, no request/response schema, and no description of what this specific charges endpoint returns. The output schema in the challenge indicates it is an HTTP POST endpoint marked as discoverable, but provides no field-level detail.
Capabilities
Use cases
- —Making per-call paid API requests without API key management
- —Programmatic Stripe charge lookups or operations via x402 payment
- —Agent-driven payment workflows settled in USDC on Base
Fit
Best for
- —Developers wanting keyless, pay-per-use API access
- —AI agents that can settle x402 payments autonomously
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Users needing detailed API documentation or OpenAPI specs before integrating
- —High-volume use cases where per-call pricing may add up without bulk discounts
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/102 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no OpenAPI spec, no request/response schema, and no meaningful documentation beyond a landing page. The specific purpose of /api/v1/stripe/charges/102 is undocumented, making integration speculative.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —All documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no technical content
- —The specific endpoint path /api/v1/stripe/charges/102 is not listed on the site's landing page among advertised APIs
- —Request and response body formats are completely unknown
Citations
- —The x402 challenge requires up to 20,000 base units of USDC on Base (=$0.02) with a 300-second timeouthttps://lowpaymentfee.com/api/v1/stripe/charges/102
- —The site advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/charges/102