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 path `/api/v1/stripe/charges/126` is not individually documented on the provider's site, but the site hosts a broad catalog of pay-per-call APIs spanning data & analytics, AI/ML (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All listed endpoints share the same $0.02-per-request pricing model.
The x402 challenge confirms the endpoint is live, accepting POST requests, and requires payment of up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) to wallet 0x1A2B…85F3. The scheme is "exact" with a 300-second timeout. No API keys or rate limits are advertised — access is purely payment-gated.
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 for any endpoint. The specific purpose of the `/stripe/charges/126` path is unclear — it may relate to Stripe charge data or be an internal route identifier. Without documentation or sample responses, the actual payload returned by this endpoint cannot be confirmed.
Capabilities
Use cases
- —Programmatic access to a pay-per-call API without needing API keys or subscriptions
- —Agent-driven workflows that settle per-request costs in USDC on Base
- —Accessing premium data or services gated behind x402 payment challenges
Fit
Best for
- —Developers or agents wanting key-free, pay-as-you-go API access
- —Crypto-native applications that can settle USDC on Base
- —Low-volume or sporadic usage where $0.02/request is cost-effective
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone unable to transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/126 \
-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 zero documentation on what this specific endpoint does, what inputs it expects, or what it returns. The docs pages are empty beyond a wallet-connect prompt. No OpenAPI spec or examples exist. The endpoint path suggests Stripe charge data but this is speculative.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content
- —The specific endpoint /api/v1/stripe/charges/126 is not listed among the provider's advertised APIs, making its purpose unclear
- —No request or response schema is documented; integration requires trial-and-error
- —No OpenAPI specification or machine-readable schema provided
Citations
- —The site advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The x402 challenge requires up to 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, which equals $0.02https://lowpaymentfee.com/api/v1/stripe/charges/126
- —The site lists API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructurehttps://lowpaymentfee.com