Check DAI wallet balances on Base via x402 micropayment — $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com returns DAI wallet balance information, accessible through the x402 payment protocol. It is part of a broader suite of pay-per-call APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints on the platform share a uniform $0.02-per-request pricing model settled in USDC on the Base network.
The specific endpoint `/api/v1/wallet/DAI/balance` accepts POST requests and returns JSON. Payment is handled via the x402 exact-payment scheme: callers attach an X-PAYMENT header with a USDC payment of up to 20,000 base units (i.e., $0.02, since USDC uses 6 decimals) to the payTo address on Base. No API keys or account registration are required — access is granted purely through on-chain micropayment. The x402 challenge confirms the endpoint is live and responding with a version-1 402 challenge.
Documentation beyond the landing page is extremely sparse. The /docs, /pricing, /api, and /README pages all resolve to a minimal "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema, and no usage examples. The exact request body format and response structure for the wallet balance endpoint are unknown and must be discovered experimentally.
Capabilities
Use cases
- —Querying DAI token balances for a given wallet address on-chain
- —Integrating wallet balance checks into automated trading or portfolio dashboards
- —Agent-driven balance verification before executing DeFi transactions
Fit
Best for
- —Developers needing quick, keyless DAI balance lookups
- —AI agents that can settle USDC micropayments on Base
- —Applications requiring pay-per-call crypto data without subscriptions
Not for
- —High-volume balance polling where $0.02/request adds up quickly
- —Users who need detailed transaction history or multi-token queries in a single call
- —Anyone without a Base-network USDC wallet for payment
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wallet/DAI/balance \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{"address": "0xYourWalletAddress"}'Example
Request
{
"address": "0x1234567890abcdef1234567890abcdef12345678"
}Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no examples, and all documentation pages return only a wallet-connect prompt. The request body and response format are entirely inferred.
Warnings
- —No OpenAPI or schema documentation available — request/response formats are unknown and must be guessed
- —All doc pages (/docs, /pricing, /api, /README) return only 'Connect wallet' with no content
- —The example_request_json is speculative; actual required fields are undocumented
- —Provider offers many endpoints but none have published technical documentation
Citations
- —Endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/wallet/DAI/balance
- —All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/wallet/DAI/balance