DeFi liquidity data for SAND token, paid per-request via x402 on Base.
What it does
This endpoint at lowpaymentfee.com provides DeFi liquidity data for the SAND token (The Sandbox). It is part of a broader suite of pay-per-call APIs offered by the same provider, spanning data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints use the x402 payment protocol on the Base network, settling in USDC.
The specific endpoint `/api/v1/defi/SAND/liquidity` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). This is consistent with the provider's stated flat pricing of $0.02 per request across all endpoints. No API keys are required; payment is handled entirely through the x402 payment header.
Documentation is extremely sparse — the docs, pricing, and API pages all render only a wallet-connect prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed description of what fields the liquidity response contains. The endpoint is confirmed live (returns a proper 402 challenge), but the lack of documentation means consumers must discover the response format empirically.
Capabilities
Use cases
- —Querying real-time liquidity depth for SAND across DeFi protocols
- —Building dashboards that track SAND liquidity changes over time
- —Automated trading bots that need liquidity data before executing SAND trades
- —Portfolio analytics tools that assess liquidity risk for SAND holdings
Fit
Best for
- —Agents or bots needing on-demand SAND liquidity data without API key management
- —Developers who want pay-per-call DeFi data with no subscription commitment
- —x402-native applications settling micropayments on Base
Not for
- —Users needing comprehensive DeFi analytics across many tokens in a single call
- —Anyone requiring detailed API documentation or guaranteed SLA before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/defi/SAND/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/request in USDC on Base). However, there is no OpenAPI schema, no request/response examples, and documentation pages are empty beyond a wallet-connect prompt. The actual response format for SAND liquidity data is unknown.
Warnings
- —No documentation available — docs, pricing, and API pages render only a wallet-connect prompt with no content
- —No OpenAPI or JSON schema describing request parameters or response fields
- —Response format for SAND liquidity data must be discovered empirically
- —This endpoint is not listed on the provider's homepage; only generic categories are shown, so its existence is inferred solely from the probe
Citations
- —The provider advertises $0.02 per request flat pricing with no API keys, no rate limits, on Base networkhttps://lowpaymentfee.com
- —USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/defi/SAND/liquidity
- —x402 challenge returns maxAmountRequired of 20000 base units (=$0.02 USDC)https://lowpaymentfee.com/api/v1/defi/SAND/liquidity