UNI liquidity data via x402 micropayment on Base for $0.02 per request
What it does
This endpoint at lowpaymentfee.com provides DeFi liquidity data for the UNI (Uniswap) token, accessible via the x402 payment protocol. Each request costs $0.02 (20,000 base units of USDC on the Base network, where USDC has 6 decimals). The endpoint accepts POST requests and returns JSON. No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof to access the data.
The provider operates a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities, all priced at $0.02 per request and settled in USDC on Base. This specific endpoint falls under the Finance & Web3 category and is focused on DeFi liquidity information for the UNI token. However, documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "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.
Because of the lack of documentation, the exact request body format and response structure are unknown. The endpoint is confirmed live (returns a proper 402 x402 challenge), but prospective users will need to experiment or contact the provider to understand the expected input and output.
Capabilities
Use cases
- —Querying current UNI token liquidity metrics for trading bots or dashboards
- —Integrating real-time DeFi liquidity data into portfolio management tools
- —Automated monitoring of Uniswap liquidity conditions
Fit
Best for
- —Developers building DeFi dashboards needing UNI liquidity data
- —AI agents that can pay per-call via x402 on Base
- —Projects wanting keyless, rate-limit-free access to DeFi data
Not for
- —Users needing comprehensive API documentation before integrating
- —Applications requiring historical or batch liquidity data (no evidence of support)
- —Non-crypto-native callers who cannot settle payments in USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/defi/UNI/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, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages return only a wallet-connect prompt. The exact request parameters and response fields are entirely unknown.
Warnings
- —No API documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
- —No OpenAPI or schema describing request parameters or response format
- —Request body structure and response fields must be discovered experimentally
- —The endpoint description is generic ('Premium API Access') and does not describe the actual data returned
Citations
- —Endpoint returns 402 with x402 challenge requiring 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/defi/UNI/liquidity
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/defi/UNI/liquidity
- —All APIs priced at $0.02 per request with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Docs, API, pricing, and README pages render only 'Connect wallet' with no further contenthttps://lowpaymentfee.com/docs