Check account balance via x402 micropayment on Base network for $0.02 per request.
What it does
This endpoint at lowpaymentfee.com returns account balance information for a specific account (ID 179) via the x402 payment protocol. It is part of a broader suite of pay-per-call APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities.
The endpoint accepts POST requests and is gated by an x402 payment challenge. Each call costs up to 20,000 base units of USDC on the Base network (0x8335…2913), which equals $0.02 USD (USDC uses 6 decimals). Payment is settled on-chain to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a maximum timeout of 300 seconds. No API keys or rate limits are advertised; access is granted purely through the x402 payment header.
Documentation is extremely sparse. The provider's landing page lists many endpoints at $0.02 each but provides no request/response schemas, parameter descriptions, or usage examples. The /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no substantive content. The specific behavior of the `/api/v1/accounts/179/balance` endpoint — what account system it queries, what fields are returned — is not documented anywhere in the crawled material. This endpoint's title "Premium API Access" is generic and does not clarify its purpose beyond the URL path suggesting an account balance lookup.
Capabilities
Use cases
- —Querying account balance information with per-request USDC micropayments
- —Integrating balance checks into automated agent workflows without API key management
- —Programmatic access to account data settled on Base L2
Fit
Best for
- —Agents or services that need on-demand account balance lookups without subscription commitments
- —Developers experimenting with x402 pay-per-call patterns on Base
- —Low-volume balance queries where $0.02/call is acceptable
Not for
- —High-volume balance polling where per-request fees would accumulate quickly
- —Users who need detailed API documentation or guaranteed SLAs before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/179/balance \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on request parameters, response schema, or what 'accounts/179/balance' actually returns. The docs, pricing, and README pages are all empty beyond a wallet connect prompt. This is effectively a stub listing.
Warnings
- —No request or response schema documented anywhere — the behavior of this endpoint is entirely opaque
- —All documentation pages (/docs, /api, /pricing, /README) return only a 'Connect wallet' prompt with no content
- —The endpoint path references a hardcoded account ID (179); it is unclear whether this is a demo or a fixed resource
- —The generic title 'Premium API Access' does not describe what this endpoint actually does
Citations
- —The endpoint returns a 402 challenge requesting up to 20,000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/accounts/179/balance
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/accounts/179/balance
- —All APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —Documentation pages (/docs, /api, /pricing, /README) contain only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs