Pay-per-call token data for ADA via x402 on Base — $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides on-demand data for the ADA (Cardano) token, accessible via the x402 payment protocol. Each call costs $0.02, settled in USDC on the Base network. No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header to a POST request and receive a JSON response.
The endpoint is part of a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 market data, and utility services, all priced uniformly at $0.02 per request. The specific `/api/v1/tokens/ADA` path sits within the Finance & Web3 category, likely returning price or market data for the ADA token, though the exact response schema is not documented.
The x402 challenge is live and well-formed: it advertises USDC (contract 0x8335…2913 on Base) with a maxAmountRequired of 20000 base units, which equals $0.02 (20000 / 10^6). The payment recipient is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3. Timeout is 300 seconds. Documentation on the site is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further detail, so the exact request parameters and response fields are unknown.
Capabilities
Use cases
- —Fetching current ADA/Cardano token data (likely price or quote) without needing an API key or account
- —Integrating low-cost, per-call crypto data into autonomous agents that settle payments on Base
- —Building dashboards or bots that pull ADA market information on demand
Fit
Best for
- —Agents or scripts that need occasional ADA token lookups without subscription overhead
- —Developers wanting frictionless, wallet-authenticated crypto data access
- —x402-native workflows on the Base network
Not for
- —High-frequency trading requiring sub-second latency and guaranteed SLAs
- —Users who need detailed historical OHLCV data or order-book depth (no evidence this is provided)
- —Anyone without a Base-compatible wallet or USDC balance
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/tokens/ADA \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no documentation of request parameters, response schema, or examples. The docs/pricing/API pages are all blank beyond a wallet-connect prompt, making it impossible to verify what data is actually returned.
Warnings
- —No documentation available — docs, pricing, and API pages render only a 'Connect wallet' prompt
- —Response schema for /api/v1/tokens/ADA is completely unknown; the endpoint may return price data, metadata, or something else
- —No OpenAPI spec or example responses provided by the site
- —Platform appears to be a generic template with many uniform $0.02 endpoints; unclear how mature or reliable the underlying data sources are
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base, equaling $0.02 per requesthttps://lowpaymentfee.com/api/v1/tokens/ADA
- —The site advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/tokens/ADA
- —Docs, pricing, and API pages render only a 'Connect wallet' prompt with no further contenthttps://lowpaymentfee.com/docs