x402-gated premium API endpoint on Base, pay $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 payment wall. The provider operates a suite of pay-per-call APIs spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network. No API keys, rate limits, or upfront commitments are required; callers simply attach an x402 payment header to each request.
The specific endpoint `/api/v1/stripe/charges/132` is listed under the provider's umbrella as "Premium API Access." The x402 challenge confirms it is live, accepting POST requests, and requires up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using the "exact" scheme with a 300-second timeout.
Documentation is extremely sparse. The crawled /docs, /api, /pricing, and /README pages all returned only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema documentation, and no description of what this particular endpoint actually returns. The endpoint path suggests it may relate to Stripe charge data, but this is speculative. Without documentation or example responses, the actual functionality of this specific endpoint remains unclear.
Capabilities
Use cases
- —Programmatic access to a premium API endpoint without needing API keys or subscriptions
- —Agent-driven workflows that need to pay per call using USDC on Base
- —Testing x402 payment protocol integrations with a low-cost endpoint
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents that settle API calls in USDC on Base
- —Users who want pay-per-use access without account signup
Not for
- —Users who need detailed API documentation or guaranteed SLAs
- —Anyone requiring non-crypto payment methods
- —Use cases requiring known, well-documented response schemas
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/132 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI spec, no request/response schema, and no explanation of what the endpoint actually does beyond the generic label 'Premium API Access'. The docs pages are all empty wallet-connect prompts. This is effectively a stub listing.
Warnings
- —No documentation available — /docs, /api, /pricing, and /README all return only a wallet-connect prompt
- —No OpenAPI or request/response schema provided; actual endpoint functionality is unknown
- —The endpoint path '/api/v1/stripe/charges/132' suggests Stripe charge data but this is unconfirmed
- —The provider lists many API categories but none have documented behavior
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/charges/132
- —All APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/charges/132