# Username Availability Checker Across Developer Platforms

> Username Availability Checker Across Developer Platforms is a paid API for AI agents from api.x402node.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Checks if a given username is available or taken across 10 major developer and social platforms including GitHub, GitLab, npm, PyPI, Reddit, HackerNews, dev.to, Medium, StackOverflow, and ProductHunt.

## Facts

- Endpoint: GET https://api.x402node.dev/identity/username-check
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-x402node-dev-eb404d77
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7WmNgYCxZTnV__Pq05Wlx

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 api-x402node-dev-eb404d77
```

Example prompt: Can you check if the username 'pixelforge' is taken on GitHub, npm, Reddit, and ProductHunt so I can decide if it's safe to use as my new project's handle?

## When to prefer this

Use this endpoint when you need to quickly audit a username or brand handle across multiple developer-centric platforms in a single call. Ideal for pre-launch brand checks, open source project naming, developer identity verification, or helping users pick a consistent handle. Prefer this over manual lookups or general social-media checkers when the focus is on developer and tech communities (GitHub, npm, PyPI, StackOverflow, etc.).

## Known failure modes

- Platform rate-limiting or downtime causes per-platform errors rather than overall failure
- Invalid or empty username returns an error response
- Unknown platform name in 'platforms' filter is silently ignored or returns an error
- Network timeouts on slow platforms may result in partial results
- Username with special characters may be rejected by some platforms

## How this service works

Check if a username is taken across 10 developer platforms (GitHub, GitLab, Reddit, HackerNews, dev.to, Medium, npm, PyPI, StackOverflow, ProductHunt). Returns per-platform {taken, status, url}. Use ?username=alice or ?username=alice and platforms=github,reddit. Built for AI agents helping pick handles, brand audits. Accepts payment on Base or Solana — either network works.

## Output

Returns a JSON object with per-platform results, each containing a 'taken' boolean, a 'status' field (e.g. available/taken/error), and a direct URL to the profile or page on that platform. Covers up to 10 platforms: GitHub, GitLab, Reddit, HackerNews, dev.to, Medium, npm, PyPI, StackOverflow, and ProductHunt.

## Example request

```json
{
 "username": "testdevuser123"
}
```

## 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 (required)"
      },
      "platforms": {
       "type": "string",
       "description": "Platforms (optional)"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-x402node-dev-eb404d77/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.x402node.dev](https://www.zero.xyz/host/api.x402node.dev/llms.txt)