DeFi liquidity data for ARB on Arbitrum, paid per-call via x402 on Base.
What it does
This endpoint at lowpaymentfee.com provides DeFi liquidity data for the ARB 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/Web3, and infrastructure utilities. The endpoint accepts POST requests and returns JSON.
Payment is handled via the x402 protocol on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The maximum amount required per call is 20,000 base units of USDC, which equals $0.02 (USDC uses 6 decimals). No API keys or rate limits are advertised; access is instant once payment is included in the X-PAYMENT header.
Documentation is extremely sparse. The provider's docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what fields the liquidity endpoint returns. The endpoint is confirmed live (returns a proper 402 challenge), but the actual data schema and response format are unknown.
Capabilities
Use cases
- —Querying current DeFi liquidity metrics for the ARB token
- —Integrating ARB liquidity data into trading bots or dashboards
- —Monitoring liquidity pool depth for ARB across DeFi protocols
Fit
Best for
- —Agents or bots needing on-demand ARB liquidity snapshots without API key management
- —Developers who want pay-per-call DeFi data with no subscription commitment
- —x402-compatible wallets and agents on the Base network
Not for
- —Users needing detailed API documentation or guaranteed SLA before integrating
- —Historical or bulk liquidity data exports (no evidence of batch support)
- —Non-crypto payment methods (only USDC on Base is accepted)
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/defi/ARB/liquidity \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02/request in 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 is entirely unknown.
Warnings
- —No API documentation available — docs, pricing, and README pages all show only 'Connect wallet'
- —No request or response schema provided; data format is unknown
- —No OpenAPI or ai-plugin manifest found
- —The specific content of the liquidity response (fields, coverage, freshness) cannot be verified
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/defi/ARB/liquidity
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/defi/ARB/liquidity
- —Provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —Docs, API, pricing, and README pages render only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs