x402-gated premium API access on Base, payable in USDC at $0.02 per request.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 paywall on the Base network. The site 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). All endpoints are priced at $0.02 per request, settled in USDC on Base with no API keys, no rate limits, and no commitments required.
The specific endpoint `/api/v1/stripe/charges/86` is labeled "Premium API Access" in the x402 challenge. Its maxAmountRequired is 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, 6 decimals), which equals $0.02. The endpoint accepts POST requests and returns application/json. The x402 challenge uses the "exact" scheme with a 300-second timeout. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3.
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, and no description of what this particular endpoint actually returns. The endpoint name ("stripe/charges/86") suggests it may relate to Stripe charge data or a proxy, but this is speculative. Without documentation or example payloads, the actual functionality of this specific route remains unclear.
Capabilities
Use cases
- —Programmatic access to premium API endpoints without traditional API key management
- —Agent-driven pay-per-call workflows settled in USDC on Base
- —Accessing data, AI, finance, or utility APIs with per-request micropayments
Fit
Best for
- —Developers or agents wanting keyless, pay-per-use API access
- —Crypto-native applications that can settle USDC on Base
- —Low-volume or sporadic API consumers who prefer no subscriptions
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume consumers who need bulk pricing or rate-limit guarantees
- —Non-crypto users without a Base-compatible wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/86 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no clarity on what this specific endpoint actually does. Effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available — actual request parameters and response format are unknown.
- —Docs, API, pricing, and README pages all render only 'Connect wallet' with no substantive content.
- —The endpoint path '/api/v1/stripe/charges/86' is ambiguous — its actual functionality is undocumented.
- —No examples or sample responses are available to verify endpoint behavior.
Citations
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Basehttps://lowpaymentfee.com/api/v1/stripe/charges/86
- —Site offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com