LINK liquidity data via x402 micropayment on Base for $0.02/request
What it does
This endpoint at lowpaymentfee.com provides DeFi liquidity data for the LINK (Chainlink) token. It is part of a broader suite of pay-per-call APIs offered by lowpaymentfee.com, all settled via the x402 protocol on the Base network using USDC. The specific resource path `/api/v1/defi/LINK/liquidity` suggests it returns liquidity pool or market depth information for LINK, though the exact response schema is not documented.
The endpoint accepts POST requests and charges a maximum of 20,000 base units of USDC (0.02 USD) per call, consistent with the provider's flat $0.02/request pricing across all endpoints. Payment is made via the x402 exact-payment scheme to a specified wallet address on Base. No API keys or account registration are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
Documentation is extremely sparse. The provider's landing page lists many API categories (data/analytics, AI/ML, finance/web3, infrastructure) but the `/api/v1/defi/LINK/liquidity` endpoint is not explicitly listed among them, and no detailed docs, request parameters, or response examples are available. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content.
Capabilities
Use cases
- —Querying current liquidity depth for LINK across DeFi protocols
- —Monitoring LINK liquidity conditions for trading bots
- —Integrating LINK liquidity data into portfolio dashboards
Fit
Best for
- —Agents needing on-demand LINK liquidity snapshots without API key signup
- —Micropayment-based DeFi data consumption on Base
- —Automated trading systems that need per-call billing with no commitments
Not for
- —Users needing comprehensive multi-token liquidity analytics with documented schemas
- —High-frequency use cases where $0.02/request adds up significantly
- —Anyone requiring detailed API documentation or guaranteed SLAs
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/defi/LINK/liquidity \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>"Endpoint
Quality
The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base). However, there is no documentation for this specific endpoint, no request/response schema, no examples, and the endpoint isn't even listed on the provider's landing page. Docs pages are empty beyond a wallet connect prompt.
Warnings
- —This specific endpoint (/api/v1/defi/LINK/liquidity) is not listed among the provider's advertised APIs on the landing page
- —No request parameters or response schema documented anywhere
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content
- —Response format and fields are entirely unknown — callers must discover behavior empirically
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/defi/LINK/liquidity
- —The provider advertises $0.02/request flat pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is used for payment on Basehttps://lowpaymentfee.com/api/v1/defi/LINK/liquidity