Check account balance via x402 micropayment on Base network for $0.02 per request.
What it does
This endpoint at lowpaymentfee.com provides account balance information behind an x402 paywall. It is part of a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.
The specific endpoint `/api/v1/accounts/62/balance` returns account balance data in JSON format. Payment is handled via the x402 protocol: callers include an `X-PAYMENT` header with a signed payment of up to 20,000 base units of USDC (i.e., $0.02, since USDC uses 6 decimals) to the payee address on Base. No API keys, rate limits, or upfront commitments are required — access is instant once payment is included.
The platform advertises a wide catalog of endpoints (metrics, reports, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, and more), all at the same $0.02 price point. Documentation pages exist but appear to be stubs requiring wallet connection, so detailed request/response schemas for this specific endpoint are not available from the crawl.
Capabilities
Use cases
- —Querying account balance data programmatically with per-call USDC micropayments
- —Integrating balance lookups into agent workflows without API key management
- —Demonstrating x402 protocol payment flows on Base network
Fit
Best for
- —Developers experimenting with x402 micropayment protocols
- —Agents needing keyless, pay-per-call balance data
- —Projects on Base network wanting USDC-settled API access
Not for
- —Users needing free or high-volume bulk balance queries
- —Anyone requiring detailed API documentation or guaranteed SLAs
- —Use cases needing non-USDC or non-Base payment rails
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/62/balance \
-H "X-PAYMENT: <signed-x402-payment-header>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documented request/response format for this specific endpoint, and the docs/pricing/README pages are all empty stubs behind a wallet-connect gate. The endpoint path suggests a hardcoded account ID (62), making its general utility unclear.
Warnings
- —No request or response schema available — the endpoint's input parameters and output format are unknown.
- —Documentation pages (/docs, /pricing, /README) are empty stubs requiring wallet connection.
- —The endpoint path includes a hardcoded account ID (62); it is unclear whether this is parameterizable or what 'account' refers to.
- —The broader platform lists many endpoints but none have documented schemas; actual functionality behind the paywall is unverified.
Citations
- —Endpoint returns 402 with x402 challenge requiring up to 20,000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/accounts/62/balance
- —Platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/accounts/62/balance
- —Platform offers APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categorieshttps://lowpaymentfee.com