DeFi liquidity data for DOT via pay-per-call x402 on Base (USDC).
What it does
This endpoint at lowpaymentfee.com provides DeFi liquidity data for the DOT (Polkadot) token. It is part of a broader suite of pay-per-request APIs offered by the same provider, spanning data analytics, AI/ML inference, finance, crypto, and utility services. The endpoint is accessed via HTTP POST and is gated by the x402 payment protocol, settling in USDC on the Base network.
Pricing is $0.02 per request (20,000 base units of USDC with 6 decimals). No API keys or rate limits are advertised; callers pay per request by attaching an X-PAYMENT header with a valid x402 payment proof. The response MIME type is application/json.
Documentation is extremely sparse. The provider's docs, API, pricing, and README pages all resolve to a minimal "Connect wallet" prompt with no further technical detail. There is no OpenAPI schema, no request/response examples, and no description of what fields the liquidity endpoint returns or what parameters it accepts. The endpoint is confirmed live (returns a proper 402 challenge), but the actual data quality and response structure are unknown.
Capabilities
Use cases
- —Querying current DeFi liquidity metrics for DOT/Polkadot
- —Monitoring DOT liquidity pool depth for trading strategies
- —Integrating DOT liquidity data into automated DeFi dashboards
Fit
Best for
- —Agents needing on-demand DOT liquidity data without API key signup
- —Developers building DeFi dashboards that include Polkadot ecosystem data
- —Automated trading bots that need per-call liquidity snapshots
Not for
- —Users who need detailed API documentation or response schema guarantees before integrating
- —High-frequency use cases where $0.02/request cost adds up significantly
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/defi/DOT/liquidity \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>"Endpoint
Quality
The endpoint is confirmed live with a valid x402 402 challenge, but there is zero documentation on request parameters, response schema, or what 'liquidity' data is actually returned. The docs/pricing/README pages are all blank wallet-connect stubs. Without any schema or examples, this is effectively a stub listing.
Warnings
- —No OpenAPI schema or request/response documentation available
- —All documentation pages (docs, API, pricing, README) return only a 'Connect wallet' prompt with no content
- —Response structure and accepted request parameters are completely unknown
- —Data quality and freshness of DOT liquidity information cannot be verified
Citations
- —Endpoint returns a valid x402 402 challenge with USDC on Base network, maxAmountRequired 20000 base unitshttps://lowpaymentfee.com/api/v1/defi/DOT/liquidity
- —Provider advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/defi/DOT/liquidity