# NetIntel Username Check Lookup

> NetIntel Username Check Lookup is a paid API for AI agents from netintel.dev, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-16).

Checks a given username across multiple platforms and returns availability status (taken/available/unknown) for each, along with an overall score and grade.

## Facts

- Endpoint: GET https://netintel.dev/username-check/lookup
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/netintel-username-check-lookup-70ee56a4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ly_qtPVgPhj2LURaRnYDE

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 netintel-username-check-lookup-70ee56a4
```

Example prompt: Can you check the username 'johndoe' across all the major platforms and tell me where it's taken, where it's available, and give me an overall availability grade?

## When to prefer this

Use this endpoint when you need a multi-platform username availability sweep in a single call with a scored summary. Prefer it over manual per-platform checks when building onboarding flows, brand registration workflows, or identity intelligence pipelines where a grade and aggregate count are needed alongside per-platform detail.

## Known failure modes

- Username missing or empty — 400 bad request
- Username exceeds 50 characters or contains invalid characters — validation error
- Payment not provided or insufficient — 402 Payment Required
- Rate limiting or platform-side blocking may cause some results to return 'unknown' status
- Downstream platform unavailability may inflate unknown_count

## How this service works

Check username availability across 20+ social platforms and developer sites simultaneously — returns which platforms have a profile registered under that handle so agents can find people, verify identities, scout brand handles, or check name availability before registration.

## Output

Returns a JSON object with a letter grade (e.g. 'A'), a numeric score (0-100), a per-platform results array listing each platform name, profile URL, and status (taken/available/unknown), plus aggregate counts for taken, available, and unknown platforms, and a findings array for notable observations.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "username": "testuser123"
  }
 }
}
```

## 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": [
      "username"
     ],
     "properties": {
      "username": {
       "type": "string",
       "description": "Username/handle to check (1-50 chars, alphanumeric + hyphens/underscores/dots)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "grade": {
       "type": "string"
      },
      "score": {
       "type": "number"
      },
      "results": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "url": {
          "type": "string"
         },
         "status": {
          "enum": [
           "taken",
           "available",
           "unknown"
          ],
          "type": "string"
         },
         "platform": {
          "type": "string"
         }
        }
       }
      },
      "findings": {
       "type": "array"
      },
      "username": {
       "type": "string"
      },
      "taken_count": {
       "type": "number"
      },
      "unknown_count": {
       "type": "number"
      },
      "available_count": {
       "type": "number"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "grade": "A",
  "score": 100,
  "results": [
   {
    "url": "https://github.com/johndoe",
    "status": "taken",
    "platform": "GitHub"
   },
   {
    "url": "https://www.npmjs.com/~johndoe",
    "status": "available",
    "platform": "npm"
   },
   {
    "url": "https://www.instagram.com/johndoe",
    "status": "unknown",
    "platform": "Instagram"
   }
  ],
  "findings": [],
  "username": "johndoe",
  "taken_count": 8,
  "unknown_count": 4,
  "available_count": 10
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/netintel-username-check-lookup-70ee56a4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from netintel.dev](https://www.zero.xyz/host/netintel.dev/llms.txt)