Uniswap TVL data via x402 micropayment on Base — $0.02 per request, no API key needed.
What it does
This endpoint provides Uniswap Total Value Locked (TVL) data through the x402 payment protocol. It is hosted at lowpaymentfee.com, a platform offering a broad catalog of pay-per-call APIs spanning DeFi, analytics, AI/ML, finance, and utility services. Each request costs $0.02 in USDC on the Base network, with no API keys, rate limits, or subscriptions required — payment is handled inline via the x402 header.
The specific endpoint `/api/v1/defi/uniswap/tvl` accepts POST requests and returns JSON. Based on the URL path, it likely returns current or historical TVL figures for Uniswap pools or the protocol as a whole. However, no detailed documentation, request schema, or example responses were found in the crawled material; the docs, API, pricing, and README pages all rendered only a "Connect wallet" prompt with no substantive content.
The endpoint is confirmed live: it returns a proper 402 challenge with x402 version 1, advertising a maximum cost of 20,000 base units of USDC (0.02 USD) on the Base network, paid to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3. The asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is Base-native USDC. Timeout is 300 seconds. No OpenAPI spec, AI plugin manifest, or agents.txt was detected.
Capabilities
Use cases
- —Fetching current Uniswap TVL for portfolio dashboards
- —Monitoring DeFi liquidity trends programmatically
- —Feeding TVL data into trading or analytics agents
- —Comparing Uniswap TVL across time periods
Fit
Best for
- —Agents or bots needing on-demand DeFi TVL without API key management
- —Developers who want pay-per-call pricing with no subscription
- —Applications already using x402 payment flows on Base
Not for
- —Users needing detailed Uniswap pool-level analytics (no evidence this endpoint provides that granularity)
- —High-volume consumers who would benefit from bulk/subscription pricing
- —Anyone requiring comprehensive API documentation before integration
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/defi/uniswap/tvl \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond the landing page listing, and no example payloads. The docs/pricing/API pages are empty. This is effectively a stub listing with only the payment challenge as evidence.
Warnings
- —No API documentation available — docs, pricing, and README pages all render only a wallet-connect prompt with no content.
- —No request or response schema found; the exact data returned by this endpoint is unknown.
- —No OpenAPI spec or AI plugin manifest detected.
- —Endpoint is not listed on the provider's own landing page catalog (the landing page lists finance and DeFi endpoints but not this specific /defi/uniswap/tvl path).
Citations
- —Endpoint returns 402 with x402 version 1 challenge, maxAmountRequired 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/defi/uniswap/tvl
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/defi/uniswap/tvl
- —Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Docs, API, pricing, and README pages render only a Connect wallet prompt with no substantive documentationhttps://lowpaymentfee.com/docs