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 a specific account (account ID 167) behind an x402 paywall. The endpoint accepts POST requests and is settled in USDC on the Base network. Each call costs a maximum of $0.02 (20,000 base units of USDC with 6 decimals).
The provider lowpaymentfee.com hosts a broader suite of pay-per-call 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 priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments — payment is handled entirely via the x402 protocol on the Base L2 network.
The specific endpoint being listed (`/api/v1/accounts/167/balance`) appears to be an account balance lookup. Documentation beyond the landing page is extremely sparse — the docs, API, pricing, and README 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 fields the balance response contains. Prospective callers should be aware that the actual behavior and response format of this endpoint are not documented.
Capabilities
Use cases
- —Querying account balance information programmatically with per-call USDC micropayments
- —Integrating balance lookups into agent workflows without pre-registration or API keys
- —Demonstrating x402 protocol payment flows on Base network
Fit
Best for
- —Developers experimenting with x402 pay-per-call patterns
- —Agents needing keyless, on-demand account balance queries
- —Low-volume balance checks where $0.02/call is acceptable
Not for
- —High-frequency balance polling where per-call costs would accumulate quickly
- —Users who need detailed documentation or guaranteed SLAs before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/167/balance
# Returns 402 with x402 payment challenge.
# Include X-PAYMENT header with valid USDC payment on Base to receive the balance response.Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no OpenAPI schema, no request/response examples, and all documentation pages are empty beyond a wallet-connect prompt. The purpose of this specific endpoint (account 167 balance) is unclear and undocumented.
Warnings
- —No OpenAPI or schema documentation available — request and response formats are unknown.
- —All doc/pricing/API/README pages render only 'Connect wallet' with no technical content.
- —The endpoint path references a hardcoded account ID (167); it is unclear whether this is a demo or a production resource.
- —The broader API suite advertised on the landing page has not been independently verified beyond this single endpoint.
Citations
- —Endpoint returns HTTP 402 with x402 challenge requiring USDC payment on Base networkhttps://lowpaymentfee.com/api/v1/accounts/167/balance
- —Maximum amount required is 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.02https://lowpaymentfee.com/api/v1/accounts/167/balance
- —All APIs priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —Docs, API, pricing, and README pages show only 'Connect wallet' with no additional contenthttps://lowpaymentfee.com/docs