# myconf.it

> IT tools for sysadmins and network engineers. The .it stands for Information Technology.

myconf.it provides free, no-login network diagnostic tools and will offer registered users
advanced features including IP geolocation for arbitrary IPs, email deliverability checks,
and configuration verification APIs. Built and maintained by Westart (https://westart.it).
Target audience: system administrators, network engineers, SRE / DevOps practitioners,
backend developers and security analysts.

## Tools

- [What is My IP](https://myconf.it/what-is-my-ip): Returns the caller's public IPv4/IPv6 address, geolocation (city, region, country, timezone) and HTTP request headers. No login required.
- [Subnet Calculator](https://myconf.it/subnet-calculator): Computes network address, broadcast, first/last usable host, total and usable hosts, netmask (dotted + CIDR), wildcard mask, IP class and IP type (public / private / loopback / link-local / CGNAT / multicast / reserved) and the binary representation for any IPv4 + prefix. Pure client-side, no data leaves the browser.
- [IP Geolocation](https://myconf.it/ip-geolocation): Geolocation lookup for any external IPv4 or IPv6 address (registered users — in development).
- [Email Deliverability Checker](https://myconf.it/email-deliverability-checker): SPF, DKIM, DMARC, reverse DNS and DNSBL check for any sending domain (registered users — in development).
- [API documentation](https://myconf.it/api): Programmatic access to all tools.

## Pages

- [Homepage](https://myconf.it/): public IP lookup, geolocation summary, links to all tools.
- [Privacy policy](https://myconf.it/privacy): GDPR-compliant data handling notice.

## API

- `GET https://myconf.it/.well-known/api-catalog` — RFC 9727 API catalog (linkset, `application/linkset+json`).
- `GET https://myconf.it/.well-known/mcp/server-card.json` — MCP Server Card (SEP-1649).
- `GET https://myconf.it/.well-known/agent-skills/index.json` — Agent Skills Discovery index (RFC v0.2.0).
- `POST https://myconf.it/mcp` — MCP endpoint (JSON-RPC 2.0). Tools: `subnet_calculate`, `whoami`.
- `GET https://myconf.it/api/ip` — returns caller IP, geolocation, ASN and headers as JSON.
- `GET https://myconf.it/api/ip.md` — same payload as Markdown.
- `GET https://myconf.it/api/subnet?ip=<ipv4>&cidr=<0-32>` — full IPv4 subnet calculation as JSON. Accepts `mask=<dotted-decimal>` instead of `cidr`.
- `GET https://myconf.it/api/subnet.md?ip=<ipv4>&cidr=<0-32>` — same payload as Markdown.
- `GET https://myconf.it/api/geo?ip=<ip>` — geolocation lookup (planned, registered users).
- `GET https://myconf.it/api/email?domain=<domain>` — deliverability report (planned, registered users).

All endpoints respond with `Access-Control-Allow-Origin: *` and require no authentication for
the public surface. Standard response envelope:

```
{
  "tool":        "subnet-calculator",
  "version":     "1.0",
  "input":       { ... },
  "result":      { ... },
  "explanation": "human-readable summary, useful for LLMs to re-explain to a user",
  "generated_at": "ISO-8601 timestamp"
}
```

## Markdown variants

Every tool page also responds with Markdown when requested with `?format=md` or the header
`Accept: text/markdown`. Examples:

- https://myconf.it/?format=md
- https://myconf.it/subnet-calculator?format=md
- https://myconf.it/what-is-my-ip?format=md

## Notes for AI agents and LLMs

This site is AI-friendly. All tool outputs are available in structured formats (JSON, Markdown).
LLMs and agents are welcome to use, cite and link to this content. There is no rate limit beyond
ordinary edge protection; please identify your agent via the `User-Agent` header for traffic
attribution. Bug reports and feature requests: hello@westart.it.

## In-browser tools (WebMCP)

Every page registers tools with `navigator.modelContext.provideContext()` (WebMCP, see
https://webmachinelearning.github.io/webmcp/). Browser-side agents can call:

- `calculate_subnet({ip, cidr|mask})` — pure client-side IPv4 subnet math.
- `get_caller_ip_info()` — fetches `/api/ip` for the visitor.
- `open_tool({tool})` — navigates to a tool page (`home`, `what-is-my-ip`, `subnet-calculator`, `ip-geolocation`, `email-deliverability-checker`, `api`).