x402-gated account balance endpoint on Base, pay-per-call with USDC.
What it does
This endpoint at lowpaymentfee.com provides a pay-per-request "Premium API Access" resource at the path `/api/v1/accounts/112/balance`. It is part of a broader platform that offers multiple x402-gated API categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.
The specific endpoint probed (`/api/v1/accounts/112/balance`) returns a live 402 challenge with a maximum amount of 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this equates to $0.02 per call, consistent with the platform's advertised flat pricing. Payment is made via the x402 exact scheme — no API keys, subscriptions, or rate limits are required. The endpoint accepts POST requests and returns `application/json`.
Documentation on the site 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 documentation, and no usage examples available. The actual data returned by this balance endpoint is unknown — the name suggests it retrieves an account balance, but without documentation or a successful response sample, the exact payload structure cannot be confirmed.
Capabilities
Use cases
- —Querying account balance data via a single paid API call
- —Integrating pay-per-request balance lookups into agent workflows
- —Testing x402 payment flows on Base with low-cost endpoints
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents needing simple pay-per-call data endpoints on Base
- —Projects that want keyless API access settled in USDC
Not for
- —Production use cases requiring documented request/response schemas
- —High-throughput applications needing guaranteed SLAs or rate limit transparency
- —Users who need fiat-only payment options
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/112/balance \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, but there is zero documentation on request parameters, response schema, or what 'account 112 balance' actually returns. Docs pages are empty stubs. Without any schema or example responses, this is effectively a stub listing.
Warnings
- —No OpenAPI spec or request/response schema available
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content
- —The specific resource '/api/v1/accounts/112/balance' is not listed on the site's landing page — its purpose is unclear
- —No example responses available to confirm what data is returned
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/accounts/112/balance
- —USDC asset address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/accounts/112/balance
- —Platform advertises $0.02 per request, no API keys, no rate limits, Base networkhttps://lowpaymentfee.com
- —Platform offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com