x402-gated account balance endpoint on Base, paid per-call in USDC.
What it does
This endpoint at lowpaymentfee.com provides a "Premium API Access" account balance lookup via the x402 payment protocol. The specific resource `/api/v1/accounts/52/balance` is accessed via HTTP POST and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of 0.02 USDC per request (20,000 base units at 6 decimals).
The broader lowpaymentfee.com platform advertises a suite of x402-gated APIs spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.
However, the specific endpoint being listed here (`/api/v1/accounts/52/balance`) does not appear in the platform's public API catalog. It may be an internal or account-specific resource. Documentation pages (docs, pricing, README) returned only a "Connect wallet" prompt with no substantive content, so the exact request/response schema for this endpoint is unknown.
Capabilities
Use cases
- —Querying an account balance via a pay-per-call x402 endpoint
- —Integrating USDC micropayments into automated agent workflows
- —Accessing premium data without API key registration
Fit
Best for
- —Agents that can settle x402 payments in USDC on Base
- —Developers wanting zero-signup, pay-per-call API access
- —Automated workflows needing on-demand account balance lookups
Not for
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —High-volume consumers who need bulk/subscription pricing
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/52/balance \
-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 documentation, no request/response schema, and the specific endpoint path does not appear in the platform's own catalog. Docs pages are empty beyond a wallet-connect prompt.
Warnings
- —The endpoint /api/v1/accounts/52/balance is not listed in the platform's public API catalog — it may be account-specific or internal.
- —All documentation pages (docs, pricing, README) returned only 'Connect wallet' with no substantive content.
- —No request body schema or response schema is available; integration requires trial-and-error or contacting the provider.
- —The platform lists many API categories (AI, finance, analytics, etc.) but provides no evidence of actual functionality behind them.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 in USDC (6 decimals) on Base network, equaling $0.02 per request.https://lowpaymentfee.com/api/v1/accounts/52/balance
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.https://lowpaymentfee.com/api/v1/accounts/52/balance
- —Documentation pages returned only a 'Connect wallet' prompt with no substantive content.https://lowpaymentfee.com/docs