Fax.Plus

Fax.Plus provides a secure, HIPAA‑compliant online fax service that lets users send and receive faxes via computer, mobile devices, or email. The platform supports enterprises, small‑medium businesses, and individuals, offering features such as digital signatures, cloud storage integration, and robust security controls. Users can manage fax numbers, view transmission logs, and automate workflows through the service’s web interface and mobile apps.

Fax.Plus is profiled on the APIs.io network. Tagged areas include Fax, Communications, Cloud, HIPAA, and Software-as-a-Service.

Fax.Plus’ developer surface includes support, pricing, documentation, and 9 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

14.3/100 emerging Agent 9/100 agent aware Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemium

0 APIs

Fax Communications Cloud HIPAA Software-as-a-Service

Kin Score

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

Composite quality — 14.3/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 2.4 / 17

Access Clarity 5.8 / 17

Operational Transparency 1.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.1 / 9

Regulatory Posture 0.9 / 15

Agent readiness — 9/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 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 8 / 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 Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey) 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 →
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 →

11 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points Ask about this →
Developer Ergonomics scores 14.3 — up to +17.1 composite points Ask about this →
Access Clarity scores 34.0 — up to +13.2 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/fax-plus/apis.yml: open an issue on github.com/api-evangelist/fax-plus 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 2

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.

Agent2Agent

measured — observed by APIs.io (conformant)

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

Fax.Plus API pricing

Prices published by Fax.Plus, read 2026-11-07 from www.fax.plus/pricing. A free plan or tier is listed.

Plan	Price
Basic	$6.99/month
Premium	$13.99/month
Business	$27.99/month
Enterprise	$79.99/month
Free	Free

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Fax.Plus Plans Pricing

5 plans

PLANS

Security Posture 1

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

Fax.Plus Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Access & Security 2

Authentication, authorization, and security posture

Security

Security

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

Pricing

Pricing

Company 1

The organization behind the API

Website

Website

Other 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: fax-plus
name: Fax.Plus
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  probe_state: none
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
image: https://cdn.prod.website-files.com/654a9caac388eec297a5ab1c/654aa0706ff433dfaeab03e8_Opengraph.jpg
description: Fax.Plus provides a secure, HIPAA‑compliant online fax service that lets users send and receive faxes via computer,
  mobile devices, or email. The platform supports enterprises, small‑medium businesses, and individuals, offering features
  such as digital signatures, cloud storage integration, and robust security controls. Users can manage fax numbers, view
  transmission logs, and automate workflows through the service’s web interface and mobile apps.
url: https://artifacts.apis.io/fax-plus/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-07 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-07'
modified: '2026-11-07'
tags:
- Fax
- Communications
- Cloud
- HIPAA
- Software-as-a-Service
tags_raw:
- Fax
- Communication
- Cloud
- HIPAA
- SaaS
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/fax-plus-plans-pricing.yml
- type: LLMsTxt
  url: llms/fax-plus-llms.txt
- type: AgentCard
  url: a2a/fax-plus-a2a.yml
- type: WellKnown
  url: well-known/fax-plus-well-known.yml
- type: Hosts
  url: hosts/fax-plus-hosts.yml
- type: Vendors
  url: vendors/fax-plus-vendors.yml
- type: Support
  url: https://www.fax.plus/help/how-to-schedule-a-fax
- type: Security
  url: https://www.fax.plus/resources/compliance/security
- type: Pricing
  url: https://www.fax.plus/pricing
- type: Documentation
  url: https://apidoc.fax.plus/
- type: DomainSecurity
  url: security/fax-plus-domain-security.yml
- type: Website
  url: https://fax.plus/
apis: []
x-coverage:
  state: none
  reason: no-developer-program
  method: derived
  generated: '2026-11-07'
  generator: derive-coverage.py (pre-flight evidence)
  detail: the company publishes no developer documentation host and no machine-readable contract on its own domain
  evidence:
  - url: https://apidoc.fax.plus/mcp
    status: null
  - url: https://fax.plus/
    status: 200
x-enrichment:
  date: '2026-11-07'
  status: enriched
  artifacts_added: 13
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Fax.Plus API — frequently asked questions

How much does the Fax.Plus API cost?

Fax.Plus publishes its prices; its Basic plan is $6.99/month as of 2026-11-07. APIs.io lists 5 pricing plans for Fax.Plus, with each plan's price, limits and inclusions under Pricing on this page.

Is the Fax.Plus API ready for AI agents?

Fax.Plus has a Kin Score of 14.3 out of 100 (emerging) and an Agent Readiness score of 8.9 (agent-aware), scored by API Evangelist on 2026-11-13.

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get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
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