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. 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, 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/66` is listed under the title "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 /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no examples of what this particular endpoint returns. The endpoint path suggests it may relate to Stripe charge data or operations, but this is speculative. Prospective callers should be aware that without documentation, the actual functionality and response format are unknown.
Capabilities
Use cases
- —Programmatic access to premium API functionality without traditional API key provisioning
- —Agent-driven workflows that need instant, keyless API access settled in USDC
- —Exploring x402 payment protocol integrations on Base
Fit
Best for
- —Developers experimenting with x402 payment-gated APIs
- —Agents that can attach x402 payment headers automatically
- —Users who want pay-as-you-go access without signup or rate limits
Not for
- —Anyone needing documented request/response schemas before integrating
- —High-volume production workloads where $0.02/request adds up without volume discounts
- —Users without USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/66 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documentation of request parameters or response format, and the /docs page is empty. The actual functionality behind 'Premium API Access' at this specific path is unknown, making this effectively a stub listing.
Warnings
- —No OpenAPI spec or schema documentation available
- —All documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no content
- —The actual functionality of /api/v1/stripe/charges/66 is undocumented — the path suggests Stripe charge operations but this is unconfirmed
- —No example requests or responses are available anywhere in the crawled material
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/charges/66
- —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/66