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 170) when called with a valid x402 payment. It is part of a broader platform that offers a variety of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all priced at $0.02 per request and settled in USDC on the Base network.
The x402 challenge confirms the endpoint is live and accepts POST requests. Payment is made via the x402 "exact" scheme, requiring up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. No API keys or rate limits are advertised; access is gated purely by the per-request micropayment. The platform emphasizes simplicity: no subscriptions, no minimums, and instant access.
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 beyond the x402 outputSchema stub, and no examples of what the balance response actually contains. The endpoint path suggests it returns a balance for account 170, but the exact response format is unknown.
Capabilities
Use cases
- —Querying account balance data with per-request USDC micropayments
- —Integrating pay-per-call balance lookups into agent workflows
- —Testing x402 payment protocol integrations on Base network
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents needing simple pay-per-call balance queries without API keys
- —Low-volume, on-demand account balance checks
Not for
- —High-volume balance monitoring requiring bulk or subscription pricing
- —Users who need detailed API documentation or response schema guarantees
- —Anyone without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/170/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/request in USDC on Base). However, documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, and no examples. The purpose of this specific endpoint (account 170 balance) is vague and unexplained.
Warnings
- —Documentation pages (/docs, /api, /pricing, /README) contain no usable content — only a 'Connect wallet' prompt.
- —No OpenAPI or JSON schema available for request or response payloads.
- —The specific meaning of 'account 170 balance' is undocumented; unclear what data is returned.
- —No robots.txt or agents.txt found on the origin.
Citations
- —The endpoint returns HTTP 402 with an x402 challenge requiring up to 20,000 base units of USDC on Base network.https://lowpaymentfee.com/api/v1/accounts/170/balance
- —All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and no minimums.https://lowpaymentfee.com
- —The USDC asset address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/accounts/170/balance