Query GMX wallet balance on-chain via x402 micropayment — $0.02 per request on Base.
What it does
This endpoint at lowpaymentfee.com returns the wallet balance for the GMX token. It is part of a broader suite of pay-per-call APIs offered by lowpaymentfee.com, all settled via the x402 protocol on the Base network using USDC. The specific endpoint path `/api/v1/wallet/GMX/balance` suggests it retrieves the current balance of a GMX token wallet, though the exact request and response schemas are not documented.
The x402 challenge confirms the endpoint is live and accepts POST requests. Payment is settled on-chain on Base using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maximum amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a timeout of 300 seconds. No API keys or rate limits are required — access is gated purely by the x402 payment header.
The provider's landing page lists many other endpoints across data/analytics, AI/ML, finance/Web3, and infrastructure categories, all priced at $0.02 per request. However, documentation pages (docs, pricing, README) all render only a "Connect wallet" prompt with no further technical detail, so the exact request body format and response schema for this endpoint remain unknown.
Capabilities
Use cases
- —Checking GMX token balance for a wallet address programmatically
- —Integrating GMX balance data into portfolio tracking dashboards
- —Automated monitoring of GMX holdings for trading bots
Fit
Best for
- —Agents needing on-demand GMX wallet balance without API key management
- —Micropayment-gated crypto data queries on Base
- —Quick one-off balance lookups without subscription commitments
Not for
- —High-frequency polling where per-request costs accumulate quickly
- —Users who need detailed transaction history or multi-token balance in a single call
- —Anyone without a Base-network USDC wallet for x402 payments
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wallet/GMX/balance \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{"address": "0xYourWalletAddress"}'Example
Request
{
"address": "0x1234567890abcdef1234567890abcdef12345678"
}Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no example responses, and the docs/pricing/README pages are all empty. Request and response formats are entirely inferred.
Warnings
- —No documentation available — docs, pricing, and README pages all show only 'Connect wallet' with no content.
- —Request body schema is unknown; the example request is speculative.
- —Response schema is completely undocumented.
- —The provider lists many endpoints across diverse categories (AI, analytics, finance, utilities) all at the same price, which may indicate a generic or placeholder service.
Citations
- —Endpoint returns 402 with x402 challenge confirming it is live on Base network using USDChttps://lowpaymentfee.com/api/v1/wallet/GMX/balance
- —maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02 per requesthttps://lowpaymentfee.com/api/v1/wallet/GMX/balance
- —All APIs priced at $0.02/request with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Documentation pages render only 'Connect wallet' with no technical contenthttps://lowpaymentfee.com/docs