Query IMX wallet balance via x402 micropayment on Base for $0.02 per request.
What it does
This endpoint at lowpaymentfee.com returns wallet balance information for IMX (Immutable X) tokens. It is part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all gated behind the x402 payment protocol on the Base network.
The specific endpoint `/api/v1/wallet/IMX/balance` accepts POST requests and is priced at 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per call (USDC uses 6 decimals). Payment is settled on-chain via the x402 "exact" scheme, meaning each request requires a one-time micropayment included in the X-PAYMENT header. No API keys, subscriptions, or rate limits are advertised — access is instant once payment is attached.
Documentation on the site is extremely thin: the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawled material. The endpoint is confirmed live (returns a proper 402 challenge), but the actual response format and accepted request parameters are unknown.
Capabilities
Use cases
- —Checking IMX token balance for a given wallet address
- —Integrating real-time IMX balance data into portfolio trackers
- —Automated agents querying wallet balances without API key management
- —On-chain payment-gated balance lookups for trustless integrations
Fit
Best for
- —Agents or apps needing quick, keyless IMX balance lookups
- —Developers who prefer pay-per-call over subscription billing
- —Web3 projects already operating on Base network
Not for
- —Bulk or high-frequency balance polling where $0.02/call adds up quickly
- —Users needing detailed transaction history or multi-token portfolio data
- —Anyone requiring comprehensive API documentation before integration
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wallet/IMX/balance \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{"address": "0xYourWalletAddress"}'Example
Request
{
"address": "0x1234567890abcdef1234567890abcdef12345678"
}Endpoint
Quality
The endpoint is confirmed live with a valid x402 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no usage examples, and the docs pages are empty stubs. The request body and response format are entirely inferred.
Warnings
- —No API documentation available — docs, pricing, API, and README pages all show only a wallet-connect prompt
- —Request body schema is unknown; the example_request_json is speculative
- —Response format is completely undocumented; example_response_json is null
- —The platform lists many endpoints but none appear to have public documentation
Citations
- —Endpoint returns a 402 challenge with x402Version 1, exact scheme, on Base network, asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (USDC), maxAmountRequired 20000https://lowpaymentfee.com/api/v1/wallet/IMX/balance
- —Platform advertises $0.02 per request, no API keys, no rate limits, instant access, Base networkhttps://lowpaymentfee.com
- —Docs, pricing, API, and README pages render only a Connect wallet prompt with no technical contenthttps://lowpaymentfee.com/docs