# DemiSignal

**Canonical:** https://apis.io/providers/demisignal-com/  
**Website:** https://demisignal.com/  
**APIs profiled:** 2

DemiSignal (operated by Demi Solutions OÜ) is an email-authentication checking and monitoring service at demisignal.com. It runs free scans of a domain's published SPF, DKIM, DMARC, MX, BIMI and MTA-STS records, offers free SPF/DMARC/DKIM generators, an SPF flattener and a DMARC report analyzer, and sells paid plans (Starter, Pro, Agency) that collect DMARC aggregate reports to show sending sources, authentication results and change alerts. It also publishes a remote MCP server (com.demisignal/mcp in the MCP registry) so AI assistants can check domains and generate records.

## Kin Score — 36.5 / 100 (thin)

Scored 2026-11-06 under rubric 0.27.0.

| Facet | Score |
|---|---|
| Discoverability | 65.0 |
| Contract Quality | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 31.6 |
| Developer Ergonomics | 45.2 |
| Access Clarity | 76.3 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 25.5 (matched via fallback).

## Agent readiness — 8.5 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |
| Pagination Ratio | na |
| Operation Distinctiveness | na |
| MCP Tool Quality | na |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (2)

- **DemiSignal Check API** — Free HTTP API documented on the DemiSignal MCP server page; GET /api/v1/check?domain= returns as JSON the same email-authentication check as the check_domain MCP tool (DMARC, SP...
- **DemiSignal MCP Server** — Remote MCP server over streamable HTTP at https://demisignal.com/mcp with three read-only tools (check_domain, generate_spf_record, generate_dmarc_record); usable with no accoun...

## MCP servers (1)

- **DemiSignal MCP Server** — Email authentication tools for a domain. check_domain looks up the domain's live DNS and grades its DMARC, SPF, DKIM, MX, BIMI and MTA-STS records. generate_spf_record and gener...

## Security (3)

- **Demisignal Com Authentication** — 2 schemes
- **Demisignal Com Domain Security** — TLSv1.3 · HSTS · DMARC
- **Demisignal Com Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **Demisignal Com Plans Pricing**

## Tags

Company, Email Authentication, DMARC, SPF, DKIM, Email Security, DNS, Domain Monitoring, MCP

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/demisignal-com/). Scores are computed from the provider's own public artifacts under a published rubric.