# Cambrian x402 API – EVM Alien V3 List Pools

> Cambrian x402 API – EVM Alien V3 List Pools is a paid API for AI agents from x402.cambrian.org, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-23).

Returns a list of Uniswap V3-style liquidity pools on EVM-compatible chains via the Cambrian pay-per-use blockchain data API.

## Facts

- Endpoint: GET https://x402.cambrian.org/x402/api/v1/evm/alien/v3/pools?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cambrian-x402-api-evm-alien-v3-list-pools-33819c9f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IwE6sdR3vuR9svaUI9WKx

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 cambrian-x402-api-evm-alien-v3-list-pools-33819c9f
```

Example prompt: Can you pull the list of Uniswap V3-style liquidity pools available on Cambrian's EVM alien endpoint so I can see what trading pairs and fee tiers are currently active?

## When to prefer this

Prefer this endpoint when you need a pay-per-use, agent-native way to enumerate V3 liquidity pools on EVM chains without managing your own blockchain node or indexer. It is especially useful for autonomous agents that need real-time pool discovery with micropayment billing via x402/USDC.

## Known failure modes

- Payment not processed — returns HTTP 402 if USDC payment is missing or insufficient
- Invalid query parameters — returns 400 if unsupported filter keys are passed
- No pools found — returns empty array if no pools match the given filters
- Network/chain unavailable — returns 503 or error if the underlying EVM node is unreachable
- Rate limiting — returns 429 if too many requests are made in a short period

## How this service works

V3 - List Pools

## Output

An array of V3 liquidity pool objects, each likely containing pool address, token pair (token0/token1), fee tier, and other on-chain pool metadata for EVM-compatible networks.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "queryParams": {
     "type": "object",
     "additionalProperties": true
    }
   }
  },
  "output": {
   "type": "object",
   "properties": {
    "example": {
     "type": "array"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cambrian-x402-api-evm-alien-v3-list-pools-33819c9f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.cambrian.org](https://www.zero.xyz/host/x402.cambrian.org/llms.txt)