Real-time ADA (Cardano) token price via x402 micropayment on Base for $0.02 per request.
What it does
This endpoint returns the current price of ADA (Cardano) in a pay-per-call model using the x402 protocol. It is part of a broader suite of APIs offered by lowpaymentfee.com, which spans data analytics, AI/ML inference, finance/Web3 data, and utility services — all priced at $0.02 per request with no API keys, no rate limits, and no commitments.
The specific endpoint `/api/v1/tokens/ADA/price` accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The x402 challenge advertises a maxAmountRequired of 20,000 base units, which at 6 decimals for USDC equals $0.02 — consistent with the site's published pricing. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a timeout of 300 seconds.
Documentation is extremely sparse. The crawled docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema, and no example payloads available. The endpoint is live (returns a proper 402 challenge), but the exact response format for a successful paid request must be inferred.
Capabilities
Use cases
- —Fetching the current ADA/Cardano price for portfolio tracking or trading bots
- —Integrating real-time token pricing into a DeFi dashboard without managing API keys
- —Agent-driven crypto price lookups settled via x402 micropayments on Base
Fit
Best for
- —Developers who want keyless, pay-per-call crypto price data
- —AI agents that need on-demand ADA pricing with x402 settlement
- —Prototyping crypto apps without subscription commitments
Not for
- —High-frequency trading requiring sub-second latency and bulk pricing (no documented rate guarantees)
- —Users who need historical price data or OHLCV candles (only current price is indicated)
- —Non-crypto payment workflows — requires USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/tokens/ADA/price \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing. However, documentation is essentially nonexistent — no OpenAPI spec, no request/response examples, and all doc pages render only a wallet-connect prompt. The exact response schema and any request body parameters are unknown.
Warnings
- —No OpenAPI specification or schema documentation available
- —All documentation pages (docs, API, pricing, README) render only a 'Connect wallet' prompt with no technical content
- —Response format for a successful paid request is completely undocumented
- —Request body schema (if any) is unknown — it may accept an empty POST or require parameters
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/tokens/ADA/price
- —All APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/tokens/ADA/price
- —The site offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com