Query TRX wallet balances via x402 micropayment — $0.02 per request on Base.
What it does
This endpoint at lowpaymentfee.com returns TRX (Tron) wallet balance data, gated behind the x402 payment protocol. Callers pay $0.02 per request in USDC on the Base network — no API keys, no rate limits, and no sign-up required. The x402 challenge confirms the endpoint is live and accepts exact-scheme payments to a specified address.
The provider operates a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services, all at the same $0.02-per-request price point. However, the specific endpoint cataloged here is `/api/v1/wallet/TRX/balance`, which appears to return balance information for a given TRX wallet address. No OpenAPI schema, request/response examples, or detailed documentation were found in the crawl — the docs, pricing, and API pages all rendered only a "Connect wallet" prompt with no substantive content.
Because the endpoint lacks published input/output schemas and documentation beyond the landing page summary, integrators will need to experiment with the POST body to determine the expected request format (likely a JSON object containing a TRX wallet address). The x402 challenge confirms USDC settlement on Base (contract 0x8335…2913) with a max amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals).
Capabilities
Use cases
- —Checking TRX wallet balances programmatically without API key registration
- —Integrating Tron balance lookups into agent workflows that support x402 payments
- —Building portfolio trackers that query multiple blockchain balances on demand
Fit
Best for
- —Agents or bots that can settle x402 payments in USDC on Base
- —Developers needing quick, keyless access to TRX balance data
- —Low-volume or sporadic queries where per-call pricing is preferable to subscriptions
Not for
- —High-volume balance monitoring where per-call costs add up quickly
- —Users who need detailed TRX transaction history or token-level breakdowns (not evidenced by this endpoint)
- —Callers who cannot settle USDC payments on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wallet/TRX/balance \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{"address": "TXyz..."}'Example
Request
{
"address": "TJCnKsPa7y5okkXvQAidZBzqx3QyQ6sxMW"
}Endpoint
Quality
The x402 challenge is live and confirms pricing and settlement details, but there is no OpenAPI schema, no documented request/response format, and the docs pages are empty. The endpoint's actual behavior must be inferred from the URL path alone.
Warnings
- —No OpenAPI or JSON schema available — request and response formats are unknown
- —Documentation pages (/docs, /api, /pricing, /README) returned no useful content beyond a wallet-connect prompt
- —Example request JSON is speculative based on the URL pattern; actual required fields are undocumented
- —The provider lists many endpoints but none have published schemas
Citations
- —Endpoint returns HTTP 402 with x402 challenge confirming it is livehttps://lowpaymentfee.com/api/v1/wallet/TRX/balance
- —Price is $0.02 per request (maxAmountRequired 20000 base units USDC, 6 decimals)https://lowpaymentfee.com
- —Settlement in USDC on Base network to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3https://lowpaymentfee.com/api/v1/wallet/TRX/balance
- —No API keys, no rate limits, instant access advertisedhttps://lowpaymentfee.com