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 account ID 84. It is part of a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints on the platform use the x402 payment protocol, settling in USDC on the Base network at $0.02 per request.
The specific endpoint `/api/v1/accounts/84/balance` is labeled "Premium API Access" and accepts POST requests. Payment is handled via the X-PAYMENT header using the x402 exact scheme. The platform advertises no API keys, no rate limits, and instant access — you pay per call with USDC and receive a JSON response. The x402 challenge was successfully captured, confirming the endpoint is live.
Documentation on the site 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 spec, no request/response schema documentation, and no example payloads available. The exact structure of the balance response and what input parameters (if any) the POST body expects are unknown.
Capabilities
Use cases
- —Querying account balance data programmatically with per-call USDC payment
- —Integrating balance checks into agent workflows without API key management
- —Demonstrating x402 protocol micropayments on Base network
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents needing keyless, pay-per-call account balance lookups
- —Projects already using USDC on Base network
Not for
- —Production use requiring documented request/response schemas
- —High-volume balance queries where per-call pricing adds up
- —Users who need fiat payment options or non-crypto settlement
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/84/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 USDC on Base), but there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The docs pages are empty stubs. The purpose of this specific endpoint (account 84 balance) is vague with no context on what 'account' refers to.
Warnings
- —No OpenAPI spec or schema documentation available
- —Docs, API, pricing, and README pages all render only 'Connect wallet' with no content
- —No request body schema or response schema documented — input/output format is unknown
- —The endpoint path includes a hardcoded account ID (84); unclear if this is parameterizable
- —Platform appears to be a demo or early-stage project with many listed endpoints but no substantive documentation
Citations
- —Endpoint returns 402 with x402 challenge, confirming it is livehttps://lowpaymentfee.com/api/v1/accounts/84/balance
- —Price is $0.02 per request, paid in USDC on Base networkhttps://lowpaymentfee.com
- —Platform advertises no API keys, no rate limits, instant accesshttps://lowpaymentfee.com
- —maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02https://lowpaymentfee.com/api/v1/accounts/84/balance
- —Docs, pricing, API, and README pages show only 'Connect wallet'https://lowpaymentfee.com/docs