GPTHuman AI

GPTHuman provides an AI Humanizer platform that transforms AI‑generated text into natural, human‑like writing. It offers a suite of products—including an AI Humanizer, AI Detector, Paraphraser, and a developer API—for students, writers, and SEO professionals who need content that passes AI detection tools and meets language quality standards.

GPTHuman AI is listed with 1 API on the APIs.io network. Tagged areas include AI Humanizer, AI Detector, Paraphraser, Developer API, and SEO.

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

GPTHuman AI’s developer surface includes support, pricing, engineering blog, getting-started guide, documentation, API reference, and 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

34.0/100 thin Agent 28/100 agent aware Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemium

1 API

AI HumanizerAI DetectorParaphraserDeveloper API SEO

Kin Score

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

Composite quality — 34.0/100 · thin

Contract Quality 5.1 / 21

Developer Ergonomics 6.1 / 17

Access Clarity 10.5 / 17

Operational Transparency 0.0 / 11

Contract Governance 2.2 / 10

Discoverability 5.3 / 9

Regulatory Posture 1.9 / 15

Agent readiness — 28/100 · 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 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):

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 →
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 →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →

9 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 23.9 — up to +19.0 composite points Ask about this →
Operational Transparency scores 0.0 — up to +13.0 composite points Ask about this →
Developer Ergonomics scores 35.7 — up to +12.9 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.

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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/gpthuman-ai/apis.yml: open an issue on github.com/api-evangelist/gpthuman-ai 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.

Agent2Agent

measured — observed by APIs.io (conformant)

APIs 1

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

GPTHuman AI API

GPTHuman AI API as documented publicly: 3 operations. Contract generated from the documentation by API Evangelist (2026-11-10); not the provider's own document.

GPTHuman AI API pricing

Prices published by GPTHuman AI, read 2026-11-10 from gpthuman.ai/pricing/.

Plan	Price
Free	$0/month
Starter	$15/month
Plus	$25/month
Unlimited	$49/month

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

GPTHuman AI Plans Pricing

4 plans

PLANS

Semantic Vocabularies 1

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

Gpthuman Ai Context

3 classes · 19 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.

GPTHuman AI API Rules

36 rules · 34 error-severity 1 warn-severity 1 info-severity

SPECTRAL

JSON Schema 3

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

GetV1HumanizeResponse

16 properties

JSON SCHEMA

PostMcpRequest

4 properties

JSON SCHEMA

PostV1HumanizeResponse

16 properties

JSON SCHEMA

Security Posture 1

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

GPTHuman AI Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

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 1

Status, limits, changes, and where to get help

Support

Support

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 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: gpthuman-ai
name: GPTHuman AI
description: GPTHuman provides an AI Humanizer platform that transforms AI‑generated text into natural, human‑like writing.
  It offers a suite of products—including an AI Humanizer, AI Detector, Paraphraser, and a developer API—for students, writers,
  and SEO professionals who need content that passes AI detection tools and meets language quality standards.
url: https://artifacts.apis.io/gpthuman-ai/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-10 (modular-v1; was harvest)
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  probe_state: gated
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
specificationVersion: '0.20'
created: '2026-11-10'
modified: '2026-11-10'
tags:
- AI Humanizer
- AI Detector
- Paraphraser
- Developer API
- SEO
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/gpthuman-ai-plans-pricing.yml
- type: Spectral
  url: rules/gpthuman-ai-rules.yml
- type: JSONLD
  url: json-ld/gpthuman-ai-context.jsonld
- type: Vocabulary
  url: vocabulary/gpthuman-ai-vocabulary.yml
- type: DataModel
  url: data-model/gpthuman-ai-data-model.yml
- type: Conformance
  url: conformance/gpthuman-ai-conformance.yml
- type: LLMsTxt
  url: llms/gpthuman-ai-llms.txt
- type: AgentCard
  url: a2a/gpthuman-ai-a2a.yml
- type: Hosts
  url: hosts/gpthuman-ai-hosts.yml
- type: Vendors
  url: vendors/gpthuman-ai-vendors.yml
- type: TermsOfService
  url: https://gpthuman.ai/terms-conditions/
- type: Support
  url: https://help.gpthuman.ai
- type: PrivacyPolicy
  url: https://gpthuman.ai/privacy-policy/
- type: Pricing
  url: https://gpthuman.ai/pricing/
- type: Login
  url: https://app.gpthuman.ai/login
- type: Blog
  url: https://gpthuman.ai/blog/
- type: GettingStarted
  url: https://help.gpthuman.ai/getting-started
- type: Documentation
  url: https://docs.gpthuman.ai/
- type: APIReference
  url: https://docs.gpthuman.ai/llms.txt
- type: DomainSecurity
  url: security/gpthuman-ai-domain-security.yml
- type: Website
  url: https://gpthuman.ai/
apis:
- aid: gpthuman-ai:gpthuman-ai-api
  name: GPTHuman AI API
  description: 'GPTHuman AI API as documented publicly: 3 operations. Contract generated from the documentation by API Evangelist
    (2026-11-10); not the provider''s own document.'
  humanURL: https://docs.gpthuman.ai/api-reference/v1/humanize/post
  baseURL: https://api.gpthuman.ai
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/gpthuman-ai-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/gpthuman-ai-get-v1-humanize-response-schema.json
  - type: JSONSchema
    url: json-schema/gpthuman-ai-post-v1-humanize-response-schema.json
  - type: JSONSchema
    url: json-schema/gpthuman-ai-post-mcp-request-schema.json
x-coverage:
  state: gated
  reason: partner-login
  method: derived
  generated: '2026-11-10'
  generator: derive-coverage.py (pre-flight evidence)
  detail: the company serves an API surface but requires credentials before any description of it can be read
  evidence:
  - url: https://docs.gpthuman.ai/mcp
    status: null
  - url: https://api.gpthuman.ai/mcp
    status: 401
  - url: https://gpthuman.ai/
    status: 200
x-enrichment:
  date: '2026-11-10'
  status: enriched
  artifacts_added: 22
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

GPTHuman AI API — frequently asked questions

Does GPTHuman AI have an API?

Yes. APIs.io lists 1 API from GPTHuman AI, including GPTHuman AI API.

Is there an OpenAPI specification for the GPTHuman AI API?

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

How do I authenticate with the GPTHuman AI API?

GPTHuman AI uses bearer-token authentication.

How much does the GPTHuman AI API cost?

GPTHuman AI publishes its prices; its Free plan is $0/month as of 2026-11-10. APIs.io lists 4 pricing plans for GPTHuman AI, with each plan's price, limits and inclusions under Pricing on this page.

Is the GPTHuman AI API ready for AI agents?

GPTHuman AI has a Kin Score of 34.0 out of 100 (thin) and an Agent Readiness score of 27.8 (agent-aware), scored by API Evangelist on 2026-11-13.

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