Guardr

Guardr provides website health monitoring and uptime checking services. It continuously checks sites for uptime, SSL certificate expiry, performance, security headers, DNS records, and other health indicators, offering real‑time alerts via email or webhooks. The platform includes a public status page and PDF reporting, with a free tier for a single site and paid plans for multiple sites.

Guardr is listed with 2 APIs on the APIs.io network. Tagged areas include Monitoring, Uptime, SSL, Security, and Websites.

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

Guardr’s developer surface includes support, pricing, documentation, engineering blog, getting-started guide, and 16 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

35.6/100 thin Agent 20/100 agent aware Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemium

2 APIs

Monitoring Uptime SSL Security Websites

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 35.6/100 · thin

Contract Quality 5.6 / 21

Developer Ergonomics 6.5 / 17

Access Clarity 9.0 / 17

Operational Transparency 1.6 / 11

Contract Governance 2.2 / 10

Discoverability 5.6 / 9

Regulatory Posture 1.9 / 15

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
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) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented) Ask about this →

10 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 26.2 — up to +18.5 composite points Ask about this →
Developer Ergonomics scores 38.1 — up to +12.4 composite points Ask about this →
Operational Transparency scores 14.3 — up to +11.1 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/guardr-io/apis.yml: open an issue on github.com/api-evangelist/guardr-io 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 →

APIs 2

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

Guardr API

Guardr REST API for site health checks, scans, account and site management.

Guardr API

Guardr API as documented publicly: 14 operations. Contract generated from the documentation by API Evangelist (2026-11-11); not the provider's own document.

Guardr API pricing

Prices published by Guardr, read 2026-11-11 from guardr.io/pricing/.

Plan	Price
Free	$0
Paid	$3.00 per paid site per month

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Guardr Plans Pricing

2 plans

PLANS

Semantic Vocabularies 1

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

Guardr Io Context

16 classes · 29 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Guardr API Rules

46 rules · 43 error-severity 1 warn-severity 2 info-severity

SPECTRAL

JSON Schema 6

Standalone JSON Schema definitions for this provider's data models.

GetApiEnrollmentTokensResponse

1 properties

JSON SCHEMA

GetV1ScanDomainResponse

9 properties

JSON SCHEMA

PostApiEnrollmentTokensResponse

7 properties

JSON SCHEMA

PostV1EnrollRequest

2 properties

JSON SCHEMA

PostV1ScanExampleComResponse

5 properties

JSON SCHEMA

PostV1ScanResponse

9 properties

JSON SCHEMA

Security Posture 1

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

Guardr Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

Login

GettingStarted

GettingStarted

DeveloperPortal

DeveloperPortal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Conformance

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

Commercial 4

Pricing, plans, and the legal terms of use

Plans

TermsOfService

PrivacyPolicy

Pricing

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: guardr-io
name: Guardr
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  probe_state: unreadable
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
image: https://guardr.io/og-image-v2.jpg
description: Guardr provides website health monitoring and uptime checking services. It continuously checks sites for uptime,
  SSL certificate expiry, performance, security headers, DNS records, and other health indicators, offering real‑time alerts
  via email or webhooks. The platform includes a public status page and PDF reporting, with a free tier for a single site
  and paid plans for multiple sites.
url: https://artifacts.apis.io/guardr-io/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-11 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-10'
modified: '2026-11-10'
tags:
- Monitoring
- Uptime
- SSL
- Security
- Websites
tags_raw:
- Monitoring
- Uptime
- SSL
- Security
- Website
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/guardr-io-plans-pricing.yml
- type: Spectral
  url: rules/guardr-io-rules.yml
- type: JSONLD
  url: json-ld/guardr-io-context.jsonld
- type: Vocabulary
  url: vocabulary/guardr-io-vocabulary.yml
- type: DataModel
  url: data-model/guardr-io-data-model.yml
- type: Conformance
  url: conformance/guardr-io-conformance.yml
- type: LLMsTxt
  url: llms/guardr-io-llms.txt
- type: Hosts
  url: hosts/guardr-io-hosts.yml
- type: Vendors
  url: vendors/guardr-io-vendors.yml
- type: TermsOfService
  url: https://guardr.io/terms/
- type: Support
  url: https://guardr.io/support/
- type: StatusPage
  url: https://status.guardr.io/
- type: PrivacyPolicy
  url: https://guardr.io/privacy/
- type: Pricing
  url: https://guardr.io/pricing/
- type: Login
  url: https://guardr.io/sign-in/
- type: Documentation
  url: https://guardr.io/docs/
- type: Blog
  url: https://guardr.io/blog/
- type: GettingStarted
  url: https://guardr.io/docs/getting-started/
- type: DeveloperPortal
  url: https://api.guardr.io</pre
- type: DomainSecurity
  url: security/guardr-io-domain-security.yml
- type: Website
  url: https://guardr.io/
apis:
- name: Guardr API
  description: Guardr REST API for site health checks, scans, account and site management.
  humanURL: https://guardr.io/docs/api/
  baseURL: https://api.guardr.io
  aid: guardr-io:guardr-api
- aid: guardr-io:guardr-io-api
  name: Guardr API
  description: 'Guardr API as documented publicly: 14 operations. Contract generated from the documentation by API Evangelist
    (2026-11-11); not the provider''s own document.'
  humanURL: https://guardr.io/docs/api
  baseURL: https://api.guardr.io
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/guardr-io-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/guardr-io-post-v1-scan-response-schema.json
  - type: JSONSchema
    url: json-schema/guardr-io-get-api-enrollment-tokens-response-schema.json
  - type: JSONSchema
    url: json-schema/guardr-io-post-v1-scan-example-com-response-schema.json
  - type: JSONSchema
    url: json-schema/guardr-io-get-v1-scan-domain-response-schema.json
  - type: JSONSchema
    url: json-schema/guardr-io-post-v1-enroll-request-schema.json
  - type: JSONSchema
    url: json-schema/guardr-io-post-api-enrollment-tokens-response-schema.json
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: API documentation is rendered via JavaScript and no machine‑readable OpenAPI spec is publicly available.
  evidence:
  - url: https://guardr.io/docs/api/
    status: 200
  checked: '2026-11-11'
x-enrichment:
  date: '2026-11-11'
  status: enriched
  artifacts_added: 24
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Guardr API — frequently asked questions

Does Guardr have an API?

Yes. APIs.io lists 2 APIs from Guardr, including Guardr API and Guardr API.

Is there an OpenAPI specification for the Guardr API?

Yes. APIs.io indexes 1 OpenAPI specification for Guardr, each linked for download from this page.

How do I authenticate with the Guardr API?

Guardr uses bearer-token authentication.

How much does the Guardr API cost?

Guardr publishes its prices; its Free plan is $0 as of 2026-11-11. APIs.io lists 2 pricing plans for Guardr, with each plan's price, limits and inclusions under Pricing on this page.

Is the Guardr API ready for AI agents?

Guardr has a Kin Score of 35.6 out of 100 (thin) and an Agent Readiness score of 19.7 (agent-aware), scored by API Evangelist on 2026-11-13.

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