# Overwing Beacon: Agent Reachability Check

> Overwing Beacon: Agent Reachability Check is a paid API for AI agents from overwing.ai, paid per call via x402, $1/call, status unknown (last checked 2026-10-12).

Checks whether a product or service is reachable and accessible by AI agents

## Facts

- Endpoint: GET https://overwing.ai/api/x402/beacon?utm_source=zero.xyz
- Price: $1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/overwing-beacon-agent-reachability-check-19b5a881
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1MbxJoCE8k26HSAJ3xIhN

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 overwing-beacon-agent-reachability-check-19b5a881
```

Example prompt: Can you use Overwing Beacon to check whether my product is currently reachable by AI agents?

## When to prefer this

Use Overwing Beacon when you need to programmatically verify whether a product or service endpoint is accessible and discoverable by AI agents or crawlers — particularly as part of deployment checks, monitoring pipelines, or debugging agent connectivity issues. Prefer this over generic uptime monitors when the specific concern is AI agent reachability rather than general availability.

## Known failure modes

- Service unavailable or unreachable at time of check
- Invalid or malformed request body
- Payment not processed (x402 payment required but not provided)
- Target product URL not recognized or misconfigured
- Network timeout or downstream connectivity issue

## How this service works

Overwing makes four products for AI agents. Guardrails checks text before an agent sends it: pass, fail or review, and one recommended action. Atlas identifies AI crawlers and agents. Beacon says whether your product is reachable by agents. Tower clears agent actions on legacy systems. REST, MCP and A2A.

## Output

Returns a result indicating whether the queried product or service is reachable and accessible by AI agents, typically as a structured JSON response with a reachability status.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/overwing-beacon-agent-reachability-check-19b5a881/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from overwing.ai](https://www.zero.xyz/host/overwing.ai/llms.txt)