# Cambrian x402 EVM Chains List

> Cambrian x402 EVM Chains List is a paid API for AI agents from x402.cambrian.org, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-13).

Returns a list of supported EVM-compatible blockchain chains available through the Cambrian x402 API

## Facts

- Endpoint: GET https://x402.cambrian.org/evm/chains
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cambrian-x402-evm-chains-list-3f898eca
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6_o9PeKD9e7iLKeBJuJ1A

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-evm-chains-list-3f898eca
```

Example prompt: What EVM-compatible blockchain networks does the Cambrian x402 API support? I want to know which chains I can query before making data calls.

## When to prefer this

Use this endpoint when you need to discover or validate which EVM-compatible blockchain networks are supported before making subsequent pay-per-use data calls on Cambrian x402. It is the canonical reference for chain availability and should be called first in any multi-chain agent workflow using Cambrian.

## Known failure modes

- Payment not included or insufficient USDC — returns 402 Payment Required
- Network or service downtime — returns 5xx error
- Invalid query parameters — may return 400 Bad Request
- Empty array if no chains are currently configured

## How this service works

Pay-per-use blockchain and social data for autonomous agents.

## Output

An array of supported EVM-compatible blockchain chain objects, likely including chain identifiers, names, and metadata about each network available through the Cambrian x402 pay-per-use data service.

## 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"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "array"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cambrian-x402-evm-chains-list-3f898eca/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)