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 specified account (account ID 145 in this case). It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories, all settled via the x402 protocol on the Base network using USDC.
The endpoint accepts POST requests and returns JSON. Payment is handled inline via the x402 protocol: callers include an X-PAYMENT header with a signed USDC payment on Base. The maximum amount required per call is 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals). The platform advertises no API keys, no rate limits, and instant access — you pay per request with no subscriptions or commitments.
Note that while the platform lists many endpoint categories (analytics, AI, finance, utilities), the specific endpoint being listed here is `/api/v1/accounts/145/balance`, which appears to be an account balance lookup. Documentation beyond the landing page is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI schema, no request/response examples, and no description of what fields the balance response contains.
Capabilities
Use cases
- —Querying account balance information programmatically with per-request USDC micropayments
- —Integrating balance checks into agent workflows that settle payments on Base L2
- —Accessing financial account data without API keys or subscriptions
Fit
Best for
- —Agents or bots that need on-demand account balance lookups with crypto micropayments
- —Developers experimenting with x402 protocol integrations on Base
- —Use cases requiring keyless, pay-as-you-go API access
Not for
- —Users who need detailed API documentation or response schema guarantees before integrating
- —High-volume balance queries where per-request pricing may add up compared to subscription APIs
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/145/balance \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-signed-payment-header>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02/request in USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages beyond the landing page are empty ('Connect wallet' only). The purpose of this specific endpoint (account 145 balance) is vague with no field-level documentation.
Warnings
- —No OpenAPI or schema documentation available — request and response formats are unknown
- —All doc/pricing/README pages return only a 'Connect wallet' prompt with no content
- —The endpoint path includes a hardcoded account ID (145); it is unclear whether other account IDs are supported or what 'accounts' refers to
- —No examples of successful responses are available anywhere in the crawled material
Citations
- —The endpoint returns HTTP 402 with x402 challenge requiring USDC payment on Base networkhttps://lowpaymentfee.com/api/v1/accounts/145/balance
- —Maximum amount required is 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913)https://lowpaymentfee.com/api/v1/accounts/145/balance
- —Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Documentation pages (docs, api, pricing, README) render only 'Connect wallet' with no additional contenthttps://lowpaymentfee.com/docs