# Cambrian Network x402 Root Endpoint

> Cambrian Network x402 Root Endpoint is a paid API for AI agents from x402.cambrian.network, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Fetches the root resource of the Cambrian x402 paid API gateway, returning the top-level index or landing content for the service

## Facts

- Endpoint: GET https://x402.cambrian.network/x402/
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cambrian-network-x402-root-endpoint-6d08611e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xsQz0sVAwVrezKkd7gOdL

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-network-x402-root-endpoint-6d08611e
```

Example prompt: Fetch the root resource from the Cambrian x402 gateway using a GET request so I can see what the top-level entry point returns.

## When to prefer this

Choose this endpoint when you need to explore or probe the Cambrian x402 API's top-level entry point, verify the service is live, or retrieve whatever index or catalog the root resource exposes. Prefer sibling endpoints for specific data like token prices, block numbers, or whitelisted tokens. This root endpoint is most useful for discovery, health-checking, or understanding the gateway's structure.

## Known failure modes

- 402 Payment Required if USDC payment is not attached or insufficient
- 400 Bad Request if input type is not 'http' or method is not GET/HEAD/DELETE
- 404 Not Found if the root resource has moved or is unavailable
- 503 Service Unavailable if the Cambrian gateway is down
- Payment settlement failure if the x402 facilitator cannot process the transaction

## How this service works

Access to /

## Output

Returns the root-level HTTP response from the Cambrian x402 gateway, which may include an index of available resources, a landing payload, or navigation links to sibling endpoints such as token prices, block numbers, and whitelisted tokens. The response body format is not fully documented but is served as a paid resource under the x402 micropayment protocol.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cambrian-network-x402-root-endpoint-6d08611e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.cambrian.network](https://www.zero.xyz/host/x402.cambrian.network/llms.txt)