the402 endpoint detail

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ozmium.org uni add

https://ozmium.org/v1/tx/lp/uni/add

answers 402

Uniswap V3 mint calldata for the OZ/WETH 1% pool at FULL RANGE, bundled multicall([mint, refundETH]) with the ETH side as msg.value so the manager wraps it and refunds any excess. POST /v1/tx/lp/uni/add { owner, ozAmount, ethAmount, slippagePct? }. UNITS: HUMAN DECIMAL STRINGS (e.g. "0.0004" ETH), NOT atomic - same exception as the Aerodrome route. Full range never goes out of range, which is the

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.01
Network
base
Pay to
0x53a05c0eed6cbf065f31aedbae7b0d8ce1a0f4db
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
69 ms
Payment options
1 usable of 1
Last checked
2026-08-15T14:24:47.922Z (21h ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fozmium.org%2Fv1%2Ftx%2Flp%2Funi%2Fadd"