Check account balance via x402 micropayment on Base network for $0.02 per request.
What it does
This endpoint at lowpaymentfee.com provides account balance information behind an x402 paywall. The specific resource `/api/v1/accounts/78/balance` accepts POST requests and returns JSON. Payment is settled in USDC on the Base network at $0.02 per call (20,000 base units with 6 decimals). No API keys or rate limits are required — access is granted per-request via the x402 payment protocol.
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 with the same x402 payment model on Base.
Documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI schema, no request/response examples, and no description of what fields the balance endpoint accepts or returns. The endpoint is confirmed live (returns a proper 402 challenge), but the actual functionality behind the paywall is opaque from available materials.
Capabilities
Use cases
- —Querying account balance information programmatically with per-request USDC payment
- —Integrating balance checks into agent workflows without managing API keys
- —Paying for individual API calls on Base L2 without subscriptions
Fit
Best for
- —Agents or apps that need on-demand account balance data with no subscription commitment
- —Developers experimenting with x402 micropayment protocols
- —Use cases requiring keyless, pay-as-you-go API access on Base
Not for
- —Users needing detailed API documentation or schema guarantees before paying
- —High-volume balance queries where per-request pricing may add up
- —Anyone without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/78/balance \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no OpenAPI schema, no request/response examples, and no meaningful documentation beyond a landing page listing. The actual functionality behind the paywall cannot be verified from available materials, making this effectively a stub listing.
Warnings
- —No OpenAPI schema or request/response documentation available
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no technical content
- —The specific purpose and data returned by /api/v1/accounts/78/balance is unclear — 'Premium API Access' is a generic label
- —Cannot verify what data is actually returned without making a paid request
Citations
- —Endpoint returns 402 with x402 challenge advertising USDC on Base at maxAmountRequired 20000https://lowpaymentfee.com/api/v1/accounts/78/balance
- —All APIs listed at $0.02 per request with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/accounts/78/balance