x402-gated account balance endpoint on Base, paying $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides a premium account balance API accessible via the x402 payment protocol. The specific route `/api/v1/accounts/92/balance` returns account balance data in JSON format upon receipt of a valid x402 payment header. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum amount of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals). No API keys or rate limits are required; access is gated purely by micropayment.
The provider, lowpaymentfee.com, hosts a broader suite of x402-gated APIs spanning data & analytics (metrics, reports, data export, insights), AI & ML (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with the same pay-per-use model.
Documentation is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI schema, no request/response examples, and no description of what the balance response payload actually contains. The endpoint is confirmed live (returns a proper 402 challenge), but the lack of documentation makes it difficult to know what data to send or expect back.
Capabilities
Use cases
- —Querying account balance data without managing API keys
- —Agent-driven balance lookups settled via on-chain USDC micropayments
- —Integrating pay-per-call financial data into automated workflows
Fit
Best for
- —Developers wanting key-free, pay-per-use API access
- —AI agents that can settle x402 payments on Base
- —Prototyping micropayment-gated data services
Not for
- —Users needing detailed API documentation or SDKs before integrating
- —High-volume batch queries where per-request pricing adds up
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/92/balance
# Returns 402 with x402 challenge; attach X-PAYMENT header with valid USDC payment on Base to access.Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages render only 'Connect wallet' with no technical content. The purpose of the specific /accounts/92/balance route is not explained beyond the generic 'Premium API Access' label.
Warnings
- —No API documentation available — docs, pricing, and API pages all show only 'Connect wallet'
- —No OpenAPI or JSON schema describing request parameters or response format
- —The specific endpoint path includes a hardcoded account ID (92), purpose unclear
- —No request or response examples available anywhere in crawled content
Citations
- —Endpoint returns 402 with x402 v1 challenge requesting 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/accounts/92/balance
- —All APIs priced at $0.02 per request with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/accounts/92/balance
- —Provider offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com