# io.github.Integrity-Os/deliverability-doctor

> Check if a domain can be email-spoofed: SPF, DMARC, DKIM, MX graded from public DNS. Authless.

- name: io.github.Integrity-Os/deliverability-doctor
- version: 1.0.2
- connection class: R0 (autonomous)
- trust: 91/100
- quality: 79/100 (good)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/io.github.Integrity-Os%2Fdeliverability-doctor
- tools: https://api.protogrid.dev/v1/servers/io.github.Integrity-Os%2Fdeliverability-doctor/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "deliverability-doctor": {
      "type": "http",
      "url": "https://deliverability-doctor.deliverability-doctor.workers.dev/mcp"
    }
  }
}
```


## Trust

- hygiene: 100
- liveness: 99
- freshness: 85
- provenance: 80
- drivers: +repository +namespace-matches-repo +reachable +uptime-97% ~updated-56d-ago
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 79/100 (good)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 71 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- fail `tools.annotations`: no tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
- fail `tools.directory_hints`: no tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: check_email_security (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); compare_email_security (readOnlyHint, destructiveHint, idempotentHint, openWorldHint)
- pass `tools.token_cost`: about 208 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: no tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 2, about 208 tokens to load them all
- tool set hash: e7c59b266eeda49824d735b3de89ca39
- badge: [![protogrid quality](https://protogrid.dev/badge/io.github.Integrity-Os/deliverability-doctor.svg)](https://protogrid.dev/servers/io.github.Integrity-Os/deliverability-doctor)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

_No tool definition changes recorded._

## Remotes

- https://deliverability-doctor.deliverability-doctor.workers.dev/mcp (streamable-http, auth none, reachable true, uptime30d 0.9655172)

## Packages

_none_

## Tools (2)

- `check_email_security`: Checks whether a domain can be email-spoofed, using public DNS only. Verifies SPF (including the RFC 7208 multiple-record permerror), DMARC policy and reporting, MX, and DKIM at common selectors. Returns a graded report with concrete fixes. Accepts a bare domain, a URL, or an email address. Nothing is sent to the domain.
- `compare_email_security`: Runs the email-security check on 2–5 domains and returns a comparison table with per-domain grades. Useful for checking your domain against competitors.