ARC-Relay

ARC-Relay provides email forwarding for any address on your domain, featuring SRS-rewritten envelope senders and ARC seals that record SPF, DKIM, and DMARC verification results. The service includes DKIM signing, customizable sender rules, AI-powered auto-replies, and a REST API with MCP support. It offers free forever plans, paid tiers with higher limits, and prioritizes privacy and security.

ARC-Relay publishes 1 API contract indexed on the APIs.io network. Tagged areas include Email, Forwarding, SRS, Arc, and Services.

The ARC-Relay catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

ARC-Relay’s developer surface includes authentication, documentation, API reference, getting-started guide, pricing, engineering blog, signup flow, and 25 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

46.2/100 developing Agent 12/100 agent aware Full breakdown ↓
scored 2026-11-02 · rubric v0.26.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract 1 MCP Servers 6 Agent Skills

Email ForwardingSRSArc Services

Kin Score

Kin Score How this is scored →
scored 2026-11-02 · rubric v0.26.0

Composite quality — 46.2/100 · developing

Contract Quality 2.3 / 21

Developer Ergonomics 8.4 / 17

Access Clarity 13.0 / 17

Operational Transparency 4.7 / 11

Contract Governance 2.2 / 10

Discoverability 5.5 / 9

Regulatory Posture 6.0 / 15

Agent readiness — 12/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

8 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 10.7 — up to +22.3 composite points
Developer Ergonomics scores 49.3 — up to +10.1 composite points
Contract Governance scores 22.0 — up to +9.4 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/arc-relay-com/apis.yml: open an issue on github.com/api-evangelist/arc-relay-com to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

ARC-Relay API

ARC-Relay API provides email forwarding, ARC sealing, SRS rewriting, and related tools.

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

ARC-Relay MCP Server

Remote MCP server at arc-relay.com.

MCP SERVER

Agent Skills 6

Packaged agent skills for driving this provider's APIs from an AI assistant.

check-dmarc

AGENT SKILL

check-email-health

AGENT SKILL

check-health

AGENT SKILL

check-spf

AGENT SKILL

network-leaderboard

AGENT SKILL

network-stats

AGENT SKILL

Pricing Plans 1

Published pricing tiers and plan structures.

Arc Relay Com Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Arc Relay Com Rate Limits

4 limits

RATE LIMITS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Arc Relay Com Context

2 classes · 18 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

ARC-Relay API Rules

55 rules · 49 errors 3 warnings 3 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Arc Relay Com Openapi Overlay

0 actions · update

UNRECORDED

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Arc Relay Com Authentication

3 schemes

SECURITY

Arc Relay Com Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Arc Relay Com Vulnerability Disclosure

security.txt · contact published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Arc Relay Com Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

LLMsTxt

MCPServer

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

Conformance

DataModel

ErrorCatalog

Build 1

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk

ToolCrosswalk

Access & Security 7

Authentication, authorization, and security posture

Security

Security

Authentication

Authentication

SecurityTxt

SecurityTxt

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Scroll for all 7

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 3

The organization behind the API

Website

Website

Blog

Blog

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: arc-relay-com
name: ARC-Relay
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  generated: '2026-11-02'
  method: derived
image: https://arc-relay.com/og-image.png
description: ARC-Relay provides email forwarding for any address on your domain, featuring SRS-rewritten envelope senders
  and ARC seals that record SPF, DKIM, and DMARC verification results. The service includes DKIM signing, customizable sender
  rules, AI-powered auto-replies, and a REST API with MCP support. It offers free forever plans, paid tiers with higher limits,
  and prioritizes privacy and security.
url: https://artifacts.apis.io/arc-relay-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-01 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-01'
modified: '2026-11-01'
tags:
- Email
- Forwarding
- SRS
- Arc
- Services
tags_raw:
- Email
- Forwarding
- SRS
- ARC
- API
- Service
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Spectral
  url: rules/arc-relay-com-rules.yml
- type: JSONLD
  url: json-ld/arc-relay-com-context.jsonld
- type: Vocabulary
  url: vocabulary/arc-relay-com-vocabulary.yml
- type: Conformance
  url: conformance/arc-relay-com-conformance.yml
- type: RateLimits
  url: rate-limits/arc-relay-com-rate-limits.yml
- type: Plans
  url: plans/arc-relay-com-plans-pricing.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/arc-relay-com-data-model.yml
- type: Security
  url: security/arc-relay-com-vulnerability-disclosure.yml
- type: Authentication
  url: authentication/arc-relay-com-authentication.yml
- type: ErrorCatalog
  url: errors/arc-relay-com-problem-types.yml
- type: LLMsTxt
  url: llms/arc-relay-com-llms.txt
- type: ToolCrosswalk
  url: mcp/arc-relay-com-tool-crosswalk.yml
- type: MCPServer
  url: mcp/arc-relay-com-mcp.yml
- type: SecurityTxt
  url: well-known/arc-relay-com-security.txt
- type: WellKnown
  url: well-known/arc-relay-com-well-known.yml
- type: Hosts
  url: hosts/arc-relay-com-hosts.yml
- type: Vendors
  url: vendors/arc-relay-com-vendors.yml
- type: VulnerabilityDisclosure
  url: security/arc-relay-com-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/arc-relay-com-domain-security.yml
- type: Website
  url: https://arc-relay.com/
- type: Documentation
  url: https://arc-relay.com/docs.html
- type: APIReference
  url: https://arc-relay.com/developers.html
- type: GettingStarted
  url: https://arc-relay.com/docs.html
- type: Pricing
  url: https://arc-relay.com/pricing.html
- type: Blog
  url: https://arc-relay.com/blog/
- type: TermsOfService
  url: https://arc-relay.com/terms.html
- type: PrivacyPolicy
  url: https://arc-relay.com/privacy.html
- type: SignUp
  url: https://arc-relay.com/signup.html
- type: VulnerabilityDisclosure
  url: security/arc-relay-com-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/arc-relay-com-domain-security.yml
- type: Website
  url: https://arc-relay.com/
apis:
- name: ARC-Relay API
  description: ARC-Relay API provides email forwarding, ARC sealing, SRS rewriting, and related tools.
  humanURL: https://arc-relay.com/docs.html
  baseURL: https://arc-relay.com
  aid: arc-relay-com:arc-relay-api
x-enrichment:
  date: '2026-11-01'
  status: enriched
  artifacts_added: 37
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

ARC-Relay API — frequently asked questions

Does ARC-Relay have an API?

Yes. APIs.io lists 1 API from ARC-Relay, including ARC-Relay API.

How do I authenticate with the ARC-Relay API?

ARC-Relay uses bearer-token authentication (3 schemes). The details are profiled on APIs.io as Arc Relay Com Authentication.

How much does the ARC-Relay API cost?

APIs.io lists 3 pricing plans for ARC-Relay, with each plan's price, limits and inclusions under Pricing Plans on this page.

Does ARC-Relay have an MCP server?

Yes. APIs.io lists 1 MCP server for ARC-Relay: Remote MCP server at arc-relay.com.

Is the ARC-Relay API ready for AI agents?

ARC-Relay has a Kin Score of 46.2 out of 100 (developing) and an Agent Readiness score of 12.4 (agent-aware), scored by API Evangelist on 2026-11-02.

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