Pay-per-request premium API access on Base via x402 protocol at $0.02/call in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific path `/api/v1/transactions/365` is one of many endpoints offered by the platform, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints are priced at $0.02 per request, paid in USDC on the Base network with no API keys, rate limits, or commitments required.
The x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base. The maxAmountRequired of 20000 base units (USDC has 6 decimals) equals $0.02 per call. Payment is made via the X-PAYMENT header using the x402 "exact" scheme with a 300-second timeout.
Documentation beyond the landing page is sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt, suggesting a wallet-gated documentation experience. The specific functionality of the `/api/v1/transactions/365` path is not documented on the landing page (it does not appear in the listed endpoints), so its exact behavior is unclear. It may be a transaction-specific resource or a general transactions endpoint.
Capabilities
Use cases
- —Accessing premium data or transaction information without subscription commitments
- —Agent-driven API consumption with per-call crypto payments
- —Programmatic access to services without managing API keys
Fit
Best for
- —Developers wanting zero-friction 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 upfront documentation before purchasing
- —High-volume consumers who would benefit from bulk pricing
- —Users without access to USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transactions/365 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but the specific functionality of /api/v1/transactions/365 is undocumented. No request/response schema, no examples, and docs pages are wallet-gated with no accessible content.
Warnings
- —The specific endpoint /api/v1/transactions/365 is not listed among the advertised APIs on the landing page — its exact functionality is unknown.
- —Documentation pages (docs, API, pricing, README) are all wallet-gated and provide no accessible content.
- —No request body schema or response schema is documented for this endpoint.
Citations
- —All endpoints priced at $0.02 per request with no API keys, rate limits, or minimumshttps://lowpaymentfee.com
- —Payment settles in USDC on Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units (USDC, 6 decimals = $0.02)https://lowpaymentfee.com/api/v1/transactions/365