# Optix402 Underpriced Endpoints Finder

> Optix402 Underpriced Endpoints Finder is a paid API for AI agents from optinx402.vercel.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-13).

Identifies underpriced API endpoints in the x402 ecosystem that may represent market arbitrage or value opportunities

## Facts

- Endpoint: GET https://optinx402.vercel.app/api/underpriced
- 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/optix402-underpriced-endpoints-finder-548fa6d6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_L8sfCrk9ZbKUiqbQw7Wk-

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-underpriced-endpoints-finder-548fa6d6
```

Example prompt: Can you pull the current list of underpriced endpoints from the x402 marketplace intelligence feed so I can see which APIs are offering the best value right now?

## When to prefer this

Use this endpoint when you want to discover low-cost or undervalued APIs within the x402 ecosystem specifically — particularly for arbitrage research, cost optimization, or scouting new capabilities at minimal spend. Prefer this over general API directories when your focus is x402 payment-gated services and pricing analytics.

## Known failure modes

- Empty items array returned if no underpriced endpoints are currently detected
- 402 Payment Required if the $0.05 USDC payment is not attached
- Network or Vercel cold-start latency causing timeout
- Stale data if the underlying analytics pipeline has not refreshed recently

## 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

Returns a JSON object with an 'items' array listing x402 endpoints currently identified as underpriced, likely including endpoint names, prices, and relevant market metadata.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/optix402-underpriced-endpoints-finder-548fa6d6/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)