x402-gated account balance endpoint on Base, paying $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides an account balance lookup via the x402 payment protocol. The specific resource `/api/v1/accounts/97/balance` is one of many endpoints offered by the lowpaymentfee.com platform, which advertises a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated behind x402 micropayments on the Base network.
The endpoint accepts POST requests and returns JSON. Payment is settled in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base) using the x402 "exact" scheme. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 USD. No API keys are needed; access is granted per-request upon valid x402 payment. The platform advertises no rate limits and instant access.
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 usage examples available from the crawl. The exact semantics of "account 97 balance" (whether it refers to a crypto wallet balance, a platform account, or something else) are not documented. The endpoint is confirmed live via a valid 402 challenge response.
Capabilities
Use cases
- —Querying account balance information via a single paid API call
- —Integrating x402 micropayment-gated balance lookups into agent workflows
- —Programmatic balance checks without API key registration
Fit
Best for
- —Developers experimenting with x402 payment protocol integrations
- —Agents needing on-demand balance data without subscription commitments
- —Low-volume, pay-per-use balance queries on Base
Not for
- —High-volume balance monitoring requiring bulk or streaming access
- —Users who need detailed API documentation or guaranteed SLAs
- —Use cases requiring non-USDC or non-Base payment rails
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/97/balance \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live with a valid x402 402 challenge, but documentation is essentially nonexistent — all doc pages render only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, no examples, and the purpose of this specific endpoint (account 97 balance) is unclear. The listing is effectively a stub.
Warnings
- —No API documentation available; all doc pages show only 'Connect wallet'
- —No request or response schema provided — input/output format is unknown
- —The meaning of 'accounts/97/balance' is undocumented; unclear what data is returned
- —The broader platform lists many endpoints but none have documented schemas or examples
Citations
- —The endpoint returns a 402 challenge with x402Version 1, exact scheme, on Base network, requiring 20000 base units of USDChttps://lowpaymentfee.com/api/v1/accounts/97/balance
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/accounts/97/balance
- —Platform advertises $0.02/request pricing, no API keys, no rate limits, instant access, Base networkhttps://lowpaymentfee.com
- —Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com