x402-payable account balance endpoint on Base, $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides an account balance lookup via the x402 payment protocol. The specific resource `/api/v1/accounts/127/balance` returns balance information for account 127 in JSON format. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of 20,000 base units (i.e., $0.02 per request, since USDC uses 6 decimals).
The provider lowpaymentfee.com hosts a broader catalog of x402-payable APIs spanning data & analytics, AI/ML inference (sentiment analysis, 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 no API keys, no rate limits, and no minimum commitments required.
Documentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available. The endpoint is confirmed live via a valid x402 402 challenge, but the actual behavior and response format of the balance endpoint can only be inferred from the endpoint path and MIME type (application/json).
Capabilities
Use cases
- —Querying account balance information via a pay-per-request model
- —Integrating x402-compatible agents with on-chain USDC micropayments on Base
- —Accessing financial data without API key registration or subscription
Fit
Best for
- —Agents or bots that need frictionless pay-per-call access without signup
- —Developers experimenting with x402 protocol integrations
- —Use cases requiring low-cost, no-commitment API access on Base
Not for
- —High-volume production workloads where $0.02/request adds up significantly
- —Users who need detailed API documentation or guaranteed SLAs
- —Applications requiring non-crypto payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/127/balance \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The endpoint is confirmed live via a valid x402 402 challenge, but there is zero documentation on request parameters, response schema, or actual functionality. The docs, pricing, API, and README pages are all blank beyond a wallet connect prompt. The listing title 'Premium API Access' is generic and uninformative. Without any schema or examples, this is effectively a stub.
Warnings
- —No OpenAPI spec or request/response schema available
- —All documentation pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no content
- —Actual response format and fields for the balance endpoint are unknown
- —The endpoint path references a hardcoded account ID (127); unclear if this is parameterizable
- —Provider catalog lists many endpoints but none have documented behavior
Citations
- —Endpoint returns 402 with x402 challenge requiring USDC payment on Base networkhttps://lowpaymentfee.com/api/v1/accounts/127/balance
- —maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02https://lowpaymentfee.com/api/v1/accounts/127/balance
- —Provider lists all endpoints at $0.02/request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —Documentation pages render only a Connect wallet prompt with no technical contenthttps://lowpaymentfee.com/docs