Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific path `/api/v1/accounts/191` appears to be one of many endpoints offered by the platform, which advertises a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request.
The endpoint is live and returns a valid x402 challenge on POST. Payment is settled in USDC (contract 0x8335…2913) on the Base network using the "exact" scheme. The max amount required is 20,000 base units, which at 6 decimals for USDC equals $0.02. No API keys or rate limits are advertised; access is granted per-call upon payment. The timeout window is 300 seconds.
Documentation is extremely sparse — the docs, pricing, API, 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 explanation of what the `/api/v1/accounts/191` endpoint specifically returns. The landing page lists many sibling endpoints but provides no detail on input parameters or response formats for any of them. The exact purpose of the "accounts/191" resource is unclear from available material.
Capabilities
Use cases
- —Accessing a pay-per-call API endpoint without needing API keys or subscriptions
- —Programmatic account data retrieval settled in USDC on Base
- —Agent-driven API consumption with per-request crypto micropayments
Fit
Best for
- —Developers wanting zero-commitment, pay-as-you-go API access
- —AI agents that can settle x402 payments autonomously
- —Users who prefer crypto-native micropayments over subscription billing
Not for
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone unable to pay in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/191 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no documentation beyond a landing page listing, no request/response schema, and no explanation of what the /api/v1/accounts/191 endpoint actually returns. The docs pages are empty. The specific purpose of this endpoint is unknown.
Warnings
- —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content
- —No OpenAPI or schema describing request parameters or response format
- —The specific purpose of /api/v1/accounts/191 is unclear; the landing page does not list this path among its advertised endpoints
- —Cannot verify what data or service is actually returned upon successful payment
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/accounts/191
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/accounts/191
- —The platform lists endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com