Check account balance via x402 micropayment on Base network for $0.02 per request.
What it does
This endpoint at lowpaymentfee.com returns account balance information for account ID 66. It is part of a broader platform offering pay-per-call APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories — all settled via the x402 protocol on the Base network using USDC.
The specific endpoint `/api/v1/accounts/66/balance` accepts POST requests and is gated by an x402 payment challenge. The maximum amount required is 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base), which equals $0.02 USD (USDC uses 6 decimals). Payment is made via the `exact` scheme to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. No API keys or rate limits are advertised; access is instant once payment is included in the X-PAYMENT header.
Documentation on the site is extremely sparse — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the balance response payload looks like. The endpoint is confirmed live (returns 402 with a valid x402 challenge), but the actual utility and response format of this specific account balance endpoint remain unclear.
Capabilities
Use cases
- —Querying account balance information for account 66 on the lowpaymentfee platform
- —Demonstrating x402 micropayment-gated API access on Base
- —Integrating pay-per-call balance checks into agent workflows
Fit
Best for
- —Developers experimenting with x402 protocol payments on Base
- —Agents needing on-demand account balance data without API key management
- —Low-volume, pay-as-you-go API consumption
Not for
- —Production use cases requiring documented response schemas and SLAs
- —High-volume balance queries where per-request fees add up
- —Users who need detailed API documentation before integration
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/66/balance \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live with a valid x402 challenge, but documentation is effectively nonexistent — no OpenAPI spec, no request/response examples, and all doc pages show only 'Connect wallet'. The purpose of this specific account balance endpoint is unclear beyond its URL path. Score reflects a live but poorly documented stub.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no content
- —Response format for the balance endpoint is completely undocumented
- —The specific meaning of 'account 66' is unexplained — unclear if this is a demo or a real resource
- —No examples of successful responses are available anywhere in the crawl
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/accounts/66/balance
- —Platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/accounts/66/balance
- —Documentation pages render only 'Connect wallet' with no technical contenthttps://lowpaymentfee.com/docs