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 (account ID 177) via an x402-gated API call. Payment is settled in USDC on the Base network at $0.02 per request (20,000 base units with 6 decimals). No API keys or rate limits are required — access is granted by attaching an x402 payment header to each request.
The provider, lowpaymentfee.com, hosts a broader suite of pay-per-call APIs spanning data & analytics, AI/ML inference (sentiment analysis, 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 and use the same x402 payment scheme on Base.
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 schema, no request/response examples, and no detailed description of what the balance endpoint returns or what input parameters it accepts beyond the POST method. The endpoint is confirmed live (returns a proper 402 challenge), but the actual functionality and response format remain unclear.
Capabilities
Use cases
- —Querying account balance information programmatically with per-request USDC payment
- —Integrating balance checks into agent workflows without managing API keys
- —Demonstrating x402 payment protocol usage on Base network
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents needing key-free, pay-per-call account balance lookups
- —Low-volume balance queries where subscription APIs are overkill
Not for
- —High-volume balance monitoring requiring bulk or subscription pricing
- —Users who need detailed API documentation or guaranteed SLAs
- —Production systems requiring well-documented response schemas
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/177/balance \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming it exists and accepts payment. However, there is no OpenAPI schema, no request/response examples, no documentation beyond a wallet-connect prompt, and the actual functionality of this specific balance endpoint is undocumented. The listing is effectively a stub.
Warnings
- —No API documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'
- —No OpenAPI or output schema provided; response format is unknown
- —No request body schema documented; unclear what parameters the POST endpoint accepts
- —Account ID 177 is hardcoded in the URL — unclear if this is a demo or a real account endpoint
Citations
- —Endpoint returns 402 with x402 challenge requiring USDC payment on Base networkhttps://lowpaymentfee.com/api/v1/accounts/177/balance
- —maxAmountRequired is 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) which equals $0.02https://lowpaymentfee.com/api/v1/accounts/177/balance
- —All APIs priced at $0.02 per request with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Provider offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com