Query SAND token wallet balance via x402 micropayment on Base network for $0.02 per request.
What it does
This endpoint at lowpaymentfee.com returns the wallet balance for the SAND token. It is part of a broader suite of pay-per-request APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3, and utility services. All endpoints are gated behind the x402 payment protocol, settling in USDC on the Base network.
The specific endpoint `/api/v1/wallet/SAND/balance` accepts POST requests and costs $0.02 per call (20,000 base units of USDC with 6 decimals). No API keys or accounts are required — callers authenticate purely via the x402 payment header. The provider advertises no rate limits and instant access.
Documentation is extremely sparse. The landing page lists available endpoints and pricing, but the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples. The endpoint is confirmed live (returns a proper 402 challenge), but the actual response format for a successful paid request is unknown.
Capabilities
Use cases
- —Checking SAND token balance for a given wallet address
- —Monitoring SAND holdings programmatically
- —Building portfolio dashboards that include SAND balances
- —Automated trading bots needing SAND balance checks
Fit
Best for
- —Agents needing on-demand SAND wallet balance without API key management
- —Developers who want pay-per-call crypto data without subscriptions
- —x402-native workflows on Base network
Not for
- —Bulk or high-frequency balance polling (no documented batch endpoint)
- —Users needing detailed SAND transaction history or analytics
- —Anyone requiring comprehensive documentation or SLA guarantees
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wallet/SAND/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 documentation is essentially nonexistent — no request/response schemas, no examples, and every doc page just shows 'Connect wallet'. The actual behavior of the endpoint after payment is entirely unknown.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README all render only 'Connect wallet'
- —No OpenAPI spec or request/response schema provided
- —Actual response format after successful payment is unknown
- —The provider lists many diverse API categories (AI, analytics, finance, utilities) all at $0.02 — unclear whether all are fully implemented
Citations
- —Endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/wallet/SAND/balance
- —Provider advertises $0.02 per request, no API keys, no rate limits, instant accesshttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/wallet/SAND/balance