Query Algorand wallet balances via x402 micropayment on Base for $0.02 per request.
What it does
This endpoint at lowpaymentfee.com returns Algorand (ALGO) wallet balance data, gated behind an x402 payment challenge. It is part of a broader suite of pay-per-call APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3, and utility services. All endpoints on the platform share a uniform $0.02 per request pricing model settled in USDC on the Base network.
The x402 challenge confirms the endpoint is live and accepts payment via the "exact" scheme. The required payment is up to 20,000 base units of USDC (contract 0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimal places. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The endpoint accepts POST requests and returns application/json.
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 schema, no request/response examples, and no description of required parameters (e.g., whether the ALGO address is passed in the body, query string, or path). The endpoint path suggests the wallet address may already be embedded in the URL pattern (`/wallet/ALGO/balance`), but this is unconfirmed. Use with caution until better documentation is available.
Capabilities
Use cases
- —Checking the balance of an Algorand wallet address programmatically
- —Integrating ALGO balance data into portfolio tracking dashboards
- —Agent-driven crypto portfolio monitoring with per-call micropayments
Fit
Best for
- —Developers needing on-demand Algorand balance lookups without API key management
- —AI agents that need pay-per-call crypto data without subscriptions
- —Low-volume or sporadic ALGO balance queries where $0.02/call is cost-effective
Not for
- —High-frequency trading or bulk balance polling (no documented rate limits but per-call cost adds up)
- —Users who need detailed Algorand transaction history or account metadata beyond balance
- —Anyone requiring comprehensive multi-chain wallet analytics in a single call
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wallet/ALGO/balance \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, documentation is essentially nonexistent — no OpenAPI spec, no request/response schema, no parameter descriptions. The actual behavior of the endpoint (what input it expects, what it returns) is entirely unverified.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet' with no technical content.
- —No OpenAPI or request/response schema provided; request parameters and response format are unknown.
- —It is unclear whether this endpoint actually queries the Algorand blockchain or is a placeholder/demo.
- —The provider site lists many diverse API categories (AI, analytics, finance, utilities) all at $0.02 — the breadth and uniform pricing raise questions about whether all endpoints are fully functional.
Citations
- —The x402 challenge requires up to 20,000 base units of USDC on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.02.https://lowpaymentfee.com/api/v1/wallet/ALGO/balance
- —All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —The endpoint accepts POST requests and returns application/json.https://lowpaymentfee.com/api/v1/wallet/ALGO/balance