SuguFAX

Sugufax provides an online fax service allowing users to send faxes directly from their smartphones without needing a fax machine. Users can upload PDFs, JPGs, or PNGs, choose a destination number, and pay per page (¥400 for up to 5 pages). The platform also integrates AI assistants like ChatGPT and Claude for smart fax composition. It offers instant reporting, scheduled sending, and supports Japanese domestic fax numbers, aiming to simplify document transmission for individuals and businesses.

SuguFAX is listed with 1 API on the APIs.io network. Tagged areas include Fax, Mobile, AI, Japan, and SaaS.

SuguFAX’s developer surface includes engineering blog and 8 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

12.2/100 emerging Agent 25/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API

Fax MobileAIJapanSaaS

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 12.2/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 1.5 / 17

Access Clarity 3.6 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.9 / 9

Regulatory Posture 2.7 / 15

Agent readiness — 25/100 · 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 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 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 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

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
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

7 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
Developer Ergonomics scores 8.8 — up to +18.2 composite points
Access Clarity scores 21.1 — up to +15.8 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/sugufax-com/apis.yml: open an issue on github.com/api-evangelist/sugufax-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 →

APIs 1

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

Sugufax API

API reference for Sugufax online fax service.

Security Posture 1

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

Sugufax Com Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Hosts

Hosts

Source (apis.yml)

aid: sugufax-com
name: SuguFAX
image: https://sugufax.com/assets/og.png
description: Sugufax provides an online fax service allowing users to send faxes directly from their smartphones without needing
  a fax machine. Users can upload PDFs, JPGs, or PNGs, choose a destination number, and pay per page (¥400 for up to 5 pages).
  The platform also integrates AI assistants like ChatGPT and Claude for smart fax composition. It offers instant reporting,
  scheduled sending, and supports Japanese domestic fax numbers, aiming to simplify document transmission for individuals
  and businesses.
url: https://artifacts.apis.io/sugufax-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-29 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-29'
modified: '2026-10-29'
tags:
- Fax
- Mobile
- AI
- Japan
- SaaS
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/sugufax-com-llms.txt
- type: WellKnown
  url: well-known/sugufax-com-well-known.yml
- type: Hosts
  url: hosts/sugufax-com-hosts.yml
- type: DomainSecurity
  url: security/sugufax-com-domain-security.yml
- type: Website
  url: https://sugufax.com/
- type: Blog
  url: https://sugufax.com/blog/
- type: TermsOfService
  url: https://sugufax.com/terms
- type: PrivacyPolicy
  url: https://sugufax.com/privacy
apis:
- name: Sugufax API
  description: API reference for Sugufax online fax service.
  humanURL: https://sugufax.com/api/
  aid: sugufax-com:sugufax-api
x-coverage:
  state: none
  reason: no-developer-program
  detail: 'SuguFAX (sugufax.com) is a live Japanese service for sending faxes from a phone without a fax machine -- its own
    site returns 200 with 54,465 bytes of readable HTML, titled ''すぐFAX｜FAX機なしでスマホからFAX送信''. It publishes no developer program:
    no portal, no contract, and its one /api/ path answers a plain 403 Forbidden (239 bytes, Apache-style, with NO Cloudflare
    or challenge markers), i.e. a closed directory rather than a bot gate or a login. Reclassified 2026-10-30 from `unreadable`/`js-rendered-docs`:
    nothing here was JavaScript-blocked, the site read fine.'
  evidence:
  - url: https://sugufax.com/
    status: 200
    note: 54,465 bytes of readable HTML
  - url: https://sugufax.com/api/
    status: 403
    note: plain 403 Forbidden, 239 bytes, no challenge markers
  checked: '2026-10-30'
x-enrichment:
  date: '2026-10-29'
  status: enriched
  artifacts_added: 14
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

SuguFAX API — frequently asked questions

Does SuguFAX have an API?

Yes. APIs.io lists 1 API from SuguFAX, including Sugufax API.

Is the SuguFAX API ready for AI agents?

SuguFAX has a Kin Score of 12.2 out of 100 (emerging) and an Agent Readiness score of 25.1 (agent-aware), scored by API Evangelist on 2026-10-31.

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