# Optix402 x402 Chains Endpoint

> Optix402 x402 Chains Endpoint is a paid API for AI agents from optinx402.vercel.app, paid per call via x402, $0.08/call, status unknown (last checked 2026-09-15).

Returns a list of blockchain chains supported within the x402 payment ecosystem

## Facts

- Endpoint: GET https://optinx402.vercel.app/api/chains
- Price: $0.08/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/optix402-x402-chains-endpoint-64a06e6f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gNA2bXhZryQs7cXsGVuTM

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 optix402-x402-chains-endpoint-64a06e6f
```

Example prompt: What blockchain chains are currently supported in the x402 ecosystem? Pull up the full list from Optix402 so I can see which networks are available.

## When to prefer this

Use this endpoint when you need to discover which blockchain networks are supported or active within the x402 payment protocol ecosystem, particularly when building tooling or dashboards that need to enumerate available chains for routing or analytics purposes.

## Known failure modes

- Empty chains array returned if no chains are currently indexed
- Payment required error (402) if USDC payment of $0.08 is not included
- Malformed or missing response if the Vercel deployment is unavailable
- Invalid properties filter parameter causing unexpected results

## How this service works

Real-time analytics for the x402 ecosystem. 30 endpoints covering market intelligence, buyer analytics, competitive analysis, revenue tracking, and ecosystem health.

## Output

A JSON object containing an array of blockchain chain records supported in the x402 ecosystem, including chain identifiers and related metadata (currently may return an empty array if no chains are indexed).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "chains": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/optix402-x402-chains-endpoint-64a06e6f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from optinx402.vercel.app](https://www.zero.xyz/host/optinx402.vercel.app/llms.txt)