# Ozmium Agent API – Aerodrome vAMM OZ/USDC Add Liquidity

> Ozmium Agent API – Aerodrome vAMM OZ/USDC Add Liquidity is a paid API for AI agents from ozmium.org, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Generates Aerodrome vAMM OZ/USDC addLiquidity calldata, prepending ERC-20 approve steps for both tokens when live allowances are insufficient

## Facts

- Endpoint: POST https://ozmium.org/v1/tx/lp/aero/add
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ozmium-agent-api-aerodrome-vamm-oz-usdc-add-liquidity-6e09e92f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MVG3Va7QdvuzacduXlmEY

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability ozmium-agent-api-aerodrome-vamm-oz-usdc-add-liquidity-6e09e92f -d '<json body>'
```

Example prompt: Build me the full transaction steps to add 1133780 OZ and 0.75 USDC as liquidity to the Aerodrome vAMM OZ/USDC pool from my wallet 0xYourAddress, with 0.5% slippage — include any approve steps needed if my allowances are short.

## When to prefer this

Use this endpoint when an agent needs ready-to-sign Aerodrome vAMM OZ/USDC liquidity-add calldata on Base, especially when ERC-20 allowances may be missing — it handles both approve steps and the LP deposit in a single call. Prefer it over generic Aerodrome SDKs when working within the Ozmium ecosystem and using human-readable decimal amounts rather than atomic units.

## Known failure modes

- Invalid or missing owner address returns a 4xx error
- ozAmount or usdcAmount provided as atomic integers instead of human decimal strings causes incorrect encoding
- Slippage too tight against live pool price results in likely on-chain revert
- Aerodrome pool contract unavailable or paused on Base causes calldata generation failure
- Allowance check fails if the RPC node is degraded, potentially returning incomplete steps

## How this service works

Aerodrome vAMM OZ/USDC addLiquidity calldata, with the ERC-20 approve steps for BOTH sides prepended when the live allowance is short. POST /v1/tx/lp/aero/add { owner, ozAmount, usdcAmount, slippagePct? }. UNITS: ozAmount and usdcAmount are HUMAN DECIMAL STRINGS (e.g. "1133780" OZ, "0.75" USDC), NOT atomic - the LP routes are the exception on this API, every other builder takes atomic. Full details: GET /v1.

## Output

An ordered array of transaction steps (to, data, value) ready to sign and submit on Base — typically one or two ERC-20 approve calls (OZ and USDC) when allowances are insufficient, followed by the Aerodrome addLiquidity calldata — plus the network identifier confirming Base chain.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "steps": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "to": {
          "type": "string"
         },
         "data": {
          "type": "string"
         },
         "value": {
          "type": "string"
         }
        }
       }
      },
      "network": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ozmium-agent-api-aerodrome-vamm-oz-usdc-add-liquidity-6e09e92f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ozmium.org](https://www.zero.xyz/host/ozmium.org/llms.txt)