# TELAGO Korea Execution Intelligence x402 Preflight API

> TELAGO Korea Execution Intelligence x402 Preflight API is a paid API for AI agents from telago-x402-discovery.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-13).

Checks whether a given URL is a valid, payable x402 endpoint before committing a micropayment for Korea execution intelligence services

## Facts

- Endpoint: GET https://telago-x402-discovery.vercel.app/x402/preflight?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/telago-korea-execution-intelligence-x402-preflight-api-cd4a0773
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3asuSqsvlzqm_3s9X6z-_

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 telago-korea-execution-intelligence-x402-preflight-api-cd4a0773
```

Example prompt: Before I pay to call the Korea address geocoding endpoint at https://telago-x402-discovery.vercel.app/x402/geocode, can you do a preflight check to confirm it's reachable, returns a proper 402 challenge, and tell me the exact USDC amount and wallet address I'd be paying?

## When to prefer this

Use this endpoint when your agent needs to confirm that a TELAGO Korea execution intelligence URL is a properly configured, payable x402 endpoint before spending USDC. It is the right choice when you want to inspect EIP-712 payment challenge details, confirm the Base network and payTo wallet, or validate API health as part of an automated agent workflow — particularly for Korea-specific logistics, geocoding, building access, field service, or robotics APIs that use x402 micropayment gating.

## Known failure modes

- Target URL is unreachable — reachable check returns false, verdict is not PAYABLE
- Target URL does not return HTTP 402 — returns402 check fails
- EIP-712 domain missing or malformed — eip712DomainPresent check fails
- payTo address absent from 402 response — payToPresent check false
- Amount invalid or zero — amountValid check false
- Non-public or localhost host provided — publicHost check false
- URL format invalid — input validation error before any network call
- Network identifier missing from challenge — networkPresent check false

## How this service works

Pay-per-call Korea execution intelligence for AI agents: address geocoding, building access, last-meter delivery, field service, robotics and cross-border logistics.

## Output

Returns a JSON object with a PAYABLE/NOT_PAYABLE verdict, a detailed breakdown of individual checks (HTTPS, reachability, public host, 402 response, amount validity, payTo address, accepted network, challenge parsing, EIP-712 domain), the HTTP status, x402 protocol version, and the selected payment parameters including asset contract address, payTo wallet, network identifier, USD amount, and atomic amount.

## 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",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "format": "uri",
       "maxLength": 1200,
       "minLength": 12
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "checks": {
   "https": true,
   "reachable": true,
   "publicHost": true,
   "returns402": true,
   "amountValid": true,
   "payToPresent": true,
   "acceptsPresent": true,
   "networkPresent": true,
   "challengeParsed": true,
   "eip712DomainPresent": true
  },
  "product": "X402_ENDPOINT_PREFLIGHT_API",
  "reasons": [],
  "verdict": "PAYABLE",
  "httpStatus": 402,
  "x402Version": 2,
  "selectedAccept": {
   "asset": "0x...",
   "payTo": "0x...",
   "network": "eip155:8453",
   "amountUsd": 0.001,
   "amountAtomic": "1000"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/telago-korea-execution-intelligence-x402-preflight-api-cd4a0773/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from telago-x402-discovery.vercel.app](https://www.zero.xyz/host/telago-x402-discovery.vercel.app/llms.txt)