scan.mx Email Diagnostics
Email deliverability check: MX, SPF, DKIM, DMARC, blacklists, MTA-STS, DNSSEC, BIMI. Graded, no key.
Should I use this
Quality & Safety
A
Based on automated analysis of tool definitions and protocol compliance.
Context Cost
~3,586Tokens (tool definitions)
~4.1 KBTypical response size
Significant attention impact (2.80% of 128k context)
This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.
Install
One-Click Install
Add this to your `claude_desktop_config.json` file:
{
"mcpServers": {
"diagnostics": {
"url": "https://api.scan.mx/mcp"
}
}
}Remote endpoints
https://api.scan.mx/mcpstreamable-httpWhat it can do
Tool inventory
Tools (9)
🟢 Read-only🟡 Write🔴 Delete⚪ Unknown
🟢check_domain(domain, include_smtp)
Run the full email and DNS deliverability check for a domain: MX, SPF, DKIM, DMARC, DNS health, provider detection, and blacklists. Returns a letter grade (A+ to F, where specific weaknesses cap the grade), a 0 to 100 score, and every individual check with its RFC reference. Set include_smtp to also run a live SMTP probe of the mail servers: the probe is non-blocking, so when smtp_status is "pending" or "running" call this tool again (poll_after_seconds hints how long to wait) until smtp_status is "complete" and the SMTP checks appear in checks.
Input Schema
{
"type": "object",
"properties": {
"domain": {
"type": "string",
"minLength": 1,
"maxLength": 253,
"description": "The domain to check, e.g. example.com. No scheme or path."
},
"include_smtp": {
"default": false,
"description": "Also run a live SMTP connectivity probe of the MX hosts. Non-blocking: poll by re-calling until smtp_status is complete.",
"type": "boolean"
}
},
"required": [
"domain"
],
"$schema": "http://json-schema.org/draft-07/schema#"
}Output Schema
{
"type": "object",
"properties": {
"domain": {
"type": "string"
},
"grade": {
"type": "string"
},
"score": {
"type": "number"
},
"provider": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"smtp_status": {
"type": "string"
},
"sections": {
"type": "object",
"propertyNames": {
"type": "string"
},
"additionalProperties": {
"type": "object",
"properties": {
"score": {
"type": "number"
},
"grade": {
"type": "string"
}
},
"required": [
"score",
"grade"
],
"additionalProperties": false
}
},
"checks": {
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"section": {
"type": "string"
},
"status": {
"type": "string"
},
"severity": {
"type": "string"
},
"message": {
"type": "string"
},
"rfc": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"details": {
"anyOf": [
{},
{
"type": "null"
}
]
}
},
"required": [
"id",
"status",
"message"
],
"additionalProperties": false
}
},
"permalink": {
"type": "string"
},
"selector": {
"type": "string"
},
"smtp_note": {
"type": "string"
},
"poll_after_seconds": {
"type": "number"
},
"created_at": {
"type": "number"
},
"updated_at": {
"type": "number"
},
"expires_at": {
"type": "number"
}
},
"required": [
"domain"
],
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false
}🟢check_mx(domain)
Check the MX records of a domain: presence, hostnames, resolution, null-MX, and common misconfigurations.
Input Schema
{
"type": "object",
"properties": {
"domain": {
"type": "string",
"minLength": 1,
"maxLength": 253,
"description": "The domain to check, e.g. example.com. No scheme or path."
}
},
"required": [
"domain"
],
"$schema": "http://json-schema.org/draft-07/schema#"
}Output Schema
{
"type": "object",
"properties": {
"domain": {
"type": "string"
},
"grade": {
"type": "string"
},
"score": {
"type": "number"
},
"provider": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"smtp_status": {
"type": "string"
},
"sections": {
"type": "object",
"propertyNames": {
"type": "string"
},
"additionalProperties": {
"type": "object",
"properties": {
"score": {
"type": "number"
},
"grade": {
"type": "string"
}
},
"required": [
"score",
"grade"
],
"additionalProperties": false
}
},
"checks": {
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"section": {
"type": "string"
},
"status": {
"type": "string"
},
"severity": {
"type": "string"
},
"message": {
"type": "string"
},
"rfc": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"details": {
"anyOf": [
{},
{
"type": "null"
}
]
}
},
"required": [
"id",
"status",
"message"
],
"additionalProperties": false
}
},
"permalink": {
"type": "string"
},
"selector": {
"type": "string"
},
"smtp_note": {
"type": "string"
},
"poll_after_seconds": {
"type": "number"
},
"created_at": {
"type": "number"
},
"updated_at": {
"type": "number"
},
"expires_at": {
"type": "number"
}
},
"required": [
"domain"
],
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false
}🟢check_spf(domain)
Check the domain SPF policy: presence, syntax, the all qualifier, and the 10-lookup limit.
Input Schema
{
"type": "object",
"properties": {
"domain": {
"type": "string",
"minLength": 1,
"maxLength": 253,
"description": "The domain to check, e.g. example.com. No scheme or path."
}
},
"required": [
"domain"
],
"$schema": "http://json-schema.org/draft-07/schema#"
}Output Schema
{
"type": "object",
"properties": {
"domain": {
"type": "string"
},
"grade": {
"type": "string"
},
"score": {
"type": "number"
},
"provider": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"smtp_status": {
"type": "string"
},
"sections": {
"type": "object",
"propertyNames": {
"type": "string"
},
"additionalProperties": {
"type": "object",
"properties": {
"score": {
"type": "number"
},
"grade": {
"type": "string"
}
},
"required": [
"score",
"grade"
],
"additionalProperties": false
}
},
"checks": {
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"section": {
"type": "string"
},
"status": {
"type": "string"
},
"severity": {
"type": "string"
},
"message": {
"type": "string"
},
"rfc": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"details": {
"anyOf": [
{},
{
"type": "null"
}
]
}
},
"required": [
"id",
"status",
"message"
],
"additionalProperties": false
}
},
"permalink": {
"type": "string"
},
"selector": {
"type": "string"
},
"smtp_note": {
"type": "string"
},
"poll_after_seconds": {
"type": "number"
},
"created_at": {
"type": "number"
},
"updated_at": {
"type": "number"
},
"expires_at": {
"type": "number"
}
},
"required": [
"domain"
],
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false
}🟢check_dmarc(domain)
Check the domain DMARC policy at _dmarc: presence, policy strength (none/quarantine/reject), and reporting.
Input Schema
{
"type": "object",
"properties": {
"domain": {
"type": "string",
"minLength": 1,
"maxLength": 253,
"description": "The domain to check, e.g. example.com. No scheme or path."
}
},
"required": [
"domain"
],
"$schema": "http://json-schema.org/draft-07/schema#"
}Output Schema
{
"type": "object",
"properties": {
"domain": {
"type": "string"
},
"grade": {
"type": "string"
},
"score": {
"type": "number"
},
"provider": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"smtp_status": {
"type": "string"
},
"sections": {
"type": "object",
"propertyNames": {
"type": "string"
},
"additionalProperties": {
"type": "object",
"properties": {
"score": {
"type": "number"
},
"grade": {
"type": "string"
}
},
"required": [
"score",
"grade"
],
"additionalProperties": false
}
},
"checks": {
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"section": {
"type": "string"
},
"status": {
"type": "string"
},
"severity": {
"type": "string"
},
"message": {
"type": "string"
},
"rfc": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"details": {
"anyOf": [
{},
{
"type": "null"
}
]
}
},
"required": [
"id",
"status",
"message"
],
"additionalProperties": false
}
},
"permalink": {
"type": "string"
},
"selector": {
"type": "string"
},
"smtp_note": {
"type": "string"
},
"poll_after_seconds": {
"type": "number"
},
"created_at": {
"type": "number"
},
"updated_at": {
"type": "number"
},
"expires_at": {
"type": "number"
}
},
"required": [
"domain"
],
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false
}🟢check_blacklist(domain)
Check whether the domain and its mail server IPs are listed on the Spamhaus (ZEN, DBL, ZRD, AuthBL), SpamCop, GBUdb and PSBL blocklists.
Input Schema
{
"type": "object",
"properties": {
"domain": {
"type": "string",
"minLength": 1,
"maxLength": 253,
"description": "The domain to check, e.g. example.com. No scheme or path."
}
},
"required": [
"domain"
],
"$schema": "http://json-schema.org/draft-07/schema#"
}Output Schema
{
"type": "object",
"properties": {
"domain": {
"type": "string"
},
"grade": {
"type": "string"
},
"score": {
"type": "number"
},
"provider": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"smtp_status": {
"type": "string"
},
"sections": {
"type": "object",
"propertyNames": {
"type": "string"
},
"additionalProperties": {
"type": "object",
"properties": {
"score": {
"type": "number"
},
"grade": {
"type": "string"
}
},
"required": [
"score",
"grade"
],
"additionalProperties": false
}
},
"checks": {
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"section": {
"type": "string"
},
"status": {
"type": "string"
},
"severity": {
"type": "string"
},
"message": {
"type": "string"
},
"rfc": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"details": {
"anyOf": [
{},
{
"type": "null"
}
]
}
},
"required": [
"id",
"status",
"message"
],
"additionalProperties": false
}
},
"permalink": {
"type": "string"
},
"selector": {
"type": "string"
},
"smtp_note": {
"type": "string"
},
"poll_after_seconds": {
"type": "number"
},
"created_at": {
"type": "number"
},
"updated_at": {
"type": "number"
},
"expires_at": {
"type": "number"
}
},
"required": [
"domain"
],
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false
}🟢check_mta_sts(domain)
Check the domain MTA-STS policy (_mta-sts TXT and the HTTPS policy file, mode and MX coverage) and its TLS-RPT reporting record.
Input Schema
{
"type": "object",
"properties": {
"domain": {
"type": "string",
"minLength": 1,
"maxLength": 253,
"description": "The domain to check, e.g. example.com. No scheme or path."
}
},
"required": [
"domain"
],
"$schema": "http://json-schema.org/draft-07/schema#"
}Output Schema
{
"type": "object",
"properties": {
"domain": {
"type": "string"
},
"grade": {
"type": "string"
},
"score": {
"type": "number"
},
"provider": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"smtp_status": {
"type": "string"
},
"sections": {
"type": "object",
"propertyNames": {
"type": "string"
},
"additionalProperties": {
"type": "object",
"properties": {
"score": {
"type": "number"
},
"grade": {
"type": "string"
}
},
"required": [
"score",
"grade"
],
"additionalProperties": false
}
},
"checks": {
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"section": {
"type": "string"
},
"status": {
"type": "string"
},
"severity": {
"type": "string"
},
"message": {
"type": "string"
},
"rfc": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"details": {
"anyOf": [
{},
{
"type": "null"
}
]
}
},
"required": [
"id",
"status",
"message"
],
"additionalProperties": false
}
},
"permalink": {
"type": "string"
},
"selector": {
"type": "string"
},
"smtp_note": {
"type": "string"
},
"poll_after_seconds": {
"type": "number"
},
"created_at": {
"type": "number"
},
"updated_at": {
"type": "number"
},
"expires_at": {
"type": "number"
}
},
"required": [
"domain"
],
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false
}🟢check_dnssec(domain)
Check DNSSEC validation and DNS health: delegation, nameserver count, SOA, and reverse DNS of the mail servers.
Input Schema
{
"type": "object",
"properties": {
"domain": {
"type": "string",
"minLength": 1,
"maxLength": 253,
"description": "The domain to check, e.g. example.com. No scheme or path."
}
},
"required": [
"domain"
],
"$schema": "http://json-schema.org/draft-07/schema#"
}Output Schema
{
"type": "object",
"properties": {
"domain": {
"type": "string"
},
"grade": {
"type": "string"
},
"score": {
"type": "number"
},
"provider": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"smtp_status": {
"type": "string"
},
"sections": {
"type": "object",
"propertyNames": {
"type": "string"
},
"additionalProperties": {
"type": "object",
"properties": {
"score": {
"type": "number"
},
"grade": {
"type": "string"
}
},
"required": [
"score",
"grade"
],
"additionalProperties": false
}
},
"checks": {
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"section": {
"type": "string"
},
"status": {
"type": "string"
},
"severity": {
"type": "string"
},
"message": {
"type": "string"
},
"rfc": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"details": {
"anyOf": [
{},
{
"type": "null"
}
]
}
},
"required": [
"id",
"status",
"message"
],
"additionalProperties": false
}
},
"permalink": {
"type": "string"
},
"selector": {
"type": "string"
},
"smtp_note": {
"type": "string"
},
"poll_after_seconds": {
"type": "number"
},
"created_at": {
"type": "number"
},
"updated_at": {
"type": "number"
},
"expires_at": {
"type": "number"
}
},
"required": [
"domain"
],
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false
}🟢check_bimi(domain)
Check the domain BIMI record at default._bimi: the SVG logo URL, the VMC/CMC certificate, and the DMARC enforcement BIMI needs.
Input Schema
{
"type": "object",
"properties": {
"domain": {
"type": "string",
"minLength": 1,
"maxLength": 253,
"description": "The domain to check, e.g. example.com. No scheme or path."
}
},
"required": [
"domain"
],
"$schema": "http://json-schema.org/draft-07/schema#"
}Output Schema
{
"type": "object",
"properties": {
"domain": {
"type": "string"
},
"grade": {
"type": "string"
},
"score": {
"type": "number"
},
"provider": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"smtp_status": {
"type": "string"
},
"sections": {
"type": "object",
"propertyNames": {
"type": "string"
},
"additionalProperties": {
"type": "object",
"properties": {
"score": {
"type": "number"
},
"grade": {
"type": "string"
}
},
"required": [
"score",
"grade"
],
"additionalProperties": false
}
},
"checks": {
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"section": {
"type": "string"
},
"status": {
"type": "string"
},
"severity": {
"type": "string"
},
"message": {
"type": "string"
},
"rfc": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"details": {
"anyOf": [
{},
{
"type": "null"
}
]
}
},
"required": [
"id",
"status",
"message"
],
"additionalProperties": false
}
},
"permalink": {
"type": "string"
},
"selector": {
"type": "string"
},
"smtp_note": {
"type": "string"
},
"poll_after_seconds": {
"type": "number"
},
"created_at": {
"type": "number"
},
"updated_at": {
"type": "number"
},
"expires_at": {
"type": "number"
}
},
"required": [
"domain"
],
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false
}🟢check_dkim(domain, selector)
Check DKIM signing keys for a domain. Without a selector, common provider selectors are probed. Pass an explicit selector to look up that exact key at selector._domainkey.
Input Schema
{
"type": "object",
"properties": {
"domain": {
"type": "string",
"minLength": 1,
"maxLength": 253,
"description": "The domain to check, e.g. example.com. No scheme or path."
},
"selector": {
"description": "An explicit DKIM selector to look up (e.g. \"google\", \"s1\").",
"type": "string",
"maxLength": 63,
"pattern": "^[a-z0-9_.-]+$"
}
},
"required": [
"domain"
],
"$schema": "http://json-schema.org/draft-07/schema#"
}Output Schema
{
"type": "object",
"properties": {
"domain": {
"type": "string"
},
"grade": {
"type": "string"
},
"score": {
"type": "number"
},
"provider": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"smtp_status": {
"type": "string"
},
"sections": {
"type": "object",
"propertyNames": {
"type": "string"
},
"additionalProperties": {
"type": "object",
"properties": {
"score": {
"type": "number"
},
"grade": {
"type": "string"
}
},
"required": [
"score",
"grade"
],
"additionalProperties": false
}
},
"checks": {
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"section": {
"type": "string"
},
"status": {
"type": "string"
},
"severity": {
"type": "string"
},
"message": {
"type": "string"
},
"rfc": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"details": {
"anyOf": [
{},
{
"type": "null"
}
]
}
},
"required": [
"id",
"status",
"message"
],
"additionalProperties": false
}
},
"permalink": {
"type": "string"
},
"selector": {
"type": "string"
},
"smtp_note": {
"type": "string"
},
"poll_after_seconds": {
"type": "number"
},
"created_at": {
"type": "number"
},
"updated_at": {
"type": "number"
},
"expires_at": {
"type": "number"
}
},
"required": [
"domain"
],
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false
}Community
Evidence
Recent observations
verifiedversion not recorded9 tools
verifiedversion not recorded9 tools
verifiedversion not recorded6 tools
verifiedversion not recorded6 tools
verifiedversion not recorded6 tools
verifiedversion not recorded6 tools