ADA liquidity data via x402 micropayment on Base network, $0.02 per request.
What it does
This endpoint provides DeFi liquidity data for ADA (Cardano) via the x402 payment protocol. It is hosted on lowpaymentfee.com, a platform offering a broad catalog of pay-per-request APIs spanning data analytics, AI/ML, finance/Web3, and infrastructure utilities. Each request costs $0.02 in USDC on the Base network, with no API keys, rate limits, or subscriptions required.
The specific endpoint at `/api/v1/defi/ADA/liquidity` accepts POST requests and returns JSON. Based on the x402 challenge, the payment scheme is "exact" with a maxAmountRequired of 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base), which equals $0.02 given USDC's 6 decimals. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.
Documentation beyond the landing page is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed description of what fields the liquidity endpoint returns. The endpoint is confirmed live (402 challenge captured), but the actual data quality and response structure remain unknown.
Capabilities
Use cases
- —Querying real-time ADA liquidity pool data for DeFi dashboards
- —Monitoring Cardano liquidity across decentralized exchanges
- —Integrating ADA liquidity metrics into trading bots or analytics pipelines
Fit
Best for
- —Agents needing on-demand ADA liquidity data without API key management
- —Developers building DeFi dashboards who want simple per-call pricing
- —Automated systems that need low-friction crypto data access via x402
Not for
- —Users who need detailed API documentation or response schema guarantees before integrating
- —High-volume consumers who would benefit from bulk pricing or subscription plans
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/defi/ADA/liquidity \
-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 ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty beyond a wallet connect prompt. The actual data returned by this endpoint is completely undocumented.
Warnings
- —No API documentation available — docs, pricing, and README pages all show only 'Connect wallet' with no content
- —No request body schema or response schema documented; consumers cannot know what fields to send or expect
- —The endpoint's actual data source and coverage for ADA liquidity is unverified
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/defi/ADA/liquidity
- —All APIs on the platform cost $0.02 per request with no API keys, rate limits, or minimumshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/defi/ADA/liquidity