Étincel

Étincel is a remote MCP server that gives Claude a trained writing voice. Connect it from Claude Code or Claude Desktop, then ask for an email, a Slack message, a PR review, or a blog post in your voice. Pick a premade tone or train one from your own samples, and audit any draft for AI-writing tells before you publish.

Étincel is listed with 1 API on the APIs.io network. Tagged areas include Artificial Intelligence, MCP, Writing, Voice, and Claude.

Étincel’s developer surface includes authentication, documentation, API reference, getting-started guide, signup flow, and 16 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

23.9/100 emerging Agent 20/100 agent aware Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessSelf serve

1 API 1 MCP Servers

Artificial Intelligence MCP Writing Voice Claude

Kin Score

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

Composite quality — 23.9/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 6.9 / 17

Access Clarity 7.2 / 17

Operational Transparency 0.5 / 11

Contract Governance 0.0 / 10

Discoverability 4.8 / 9

Regulatory Posture 3.3 / 15

Agent readiness — 20/100 · 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 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 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

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 →
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 →

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 0.0 — up to +25.0 composite points Ask about this →
Operational Transparency scores 4.8 — up to +12.4 composite points Ask about this →
Contract Governance scores 0.0 — up to +12.0 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/etincel-ai/apis.yml: open an issue on github.com/api-evangelist/etincel-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 3

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)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

APIs 1

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

Étincel MCP

Remote MCP server providing Claude with a trained writing voice.

MCP Servers 1

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

Étincel MCP Server

MCP SERVER

Terms of Service 1

What its API terms permit and prohibit, quoted from its own page.

Étincel

8 quoted statements, read from Étincel's own page on 2026-11-09.

TERMS

Privacy & Data 1

Its role, the data it processes, retention and transfers, quoted from its own privacy page.

Étincel

10 quoted statements, read from Étincel's own page on 2026-11-09.

PRIVACY

Eligibility 1

Who may sign up and where, quoted from its own terms.

Étincel

2 quoted statements, read from Étincel's own page on 2026-11-09.

ELIGIBILITY

AI Preferences 1

Its stance on AI training, inference and agents, quoted from its own pages.

Étincel

3 quoted statements, read from Étincel's own page on 2026-11-09.

AI PREFS

Data License 1

How its data and outputs may be reused, quoted from its own terms.

Étincel

1 quoted statement, read from Étincel's own page on 2026-11-09.

LICENSE

Security Posture 2

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

Étincel Authentication

1 scheme

SECURITY

Étincel Domain Security

TLSv1.3 · HSTS

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Étincel Scopes

1 scope

1 scopes

SCOPES

Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

AIPreferences

AIPreferences

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

MCPServer

MCPServer

WellKnown

WellKnown

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

OAuthScopes

OAuthScopes

DomainSecurity

DomainSecurity

Commercial 4

Pricing, plans, and the legal terms of use

TermsOfService

PrivacyPolicy

UsageTerms

DataLicense

Company 1

The organization behind the API

Website

Website

Other 4

Properties that don't map to a standard resource type

Hosts

Vendors

DataProcessing

Eligibility

Source (apis.yml)

aid: etincel-ai
name: Étincel
description: Étincel is a remote MCP server that gives Claude a trained writing voice. Connect it from Claude Code or Claude
  Desktop, then ask for an email, a Slack message, a PR review, or a blog post in your voice. Pick a premade tone or train
  one from your own samples, and audit any draft for AI-writing tells before you publish.
url: https://artifacts.apis.io/etincel-ai/apis.yml
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Self-serve signup
  confidence: medium
  probe_state: unreadable
  source:
  - authentication
  - scopes
  - security
  generated: '2026-11-13'
  method: derived
image: https://etincel.ai/opengraph-image
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'
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: The provider's public documentation does not publish any machine‑readable OpenAPI, GraphQL, AsyncAPI, gRPC or WSDL
    spec.
  evidence:
  - url: https://etincel.ai/openapi.json
    status: 404
  checked: '2026-11-07'
tags:
- Artificial Intelligence
- MCP
- Writing
- Voice
- Claude
tags_raw:
- AI
- MCP
- Writing
- Voice
- Claude
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Authentication
  url: authentication/etincel-ai-authentication.yml
- type: OAuthScopes
  url: scopes/etincel-ai-scopes.yml
- type: LLMsTxt
  url: llms/etincel-ai-llms.txt
- type: MCPServer
  url: mcp/etincel-ai-mcp.yml
- type: WellKnown
  url: well-known/etincel-ai-well-known.yml
- type: Hosts
  url: hosts/etincel-ai-hosts.yml
- type: Vendors
  url: vendors/etincel-ai-vendors.yml
- type: DomainSecurity
  url: security/etincel-ai-domain-security.yml
- type: Website
  url: https://etincel.ai/
- type: Documentation
  url: https://etincel.ai/connect
- type: APIReference
  url: https://etincel.ai/api/mcp
- type: GettingStarted
  url: https://etincel.ai/explore
- type: SignUp
  url: https://etincel.ai/sign-in
- type: TermsOfService
  url: https://etincel.ai/terms
- type: PrivacyPolicy
  url: https://etincel.ai/privacy
- type: GitHubOrganization
  url: https://github.com/AIStoryHub
- type: UsageTerms
  url: terms/etincel-ai-terms-of-service.yml
- type: DataProcessing
  url: privacy/etincel-ai-privacy-policy.yml
- type: Eligibility
  url: eligibility/etincel-ai-eligibility.yml
- type: AIPreferences
  url: ai-preferences/etincel-ai-ai-preferences.yml
- type: DataLicense
  url: data-license/etincel-ai-data-license.yml
apis:
- name: Étincel MCP
  description: Remote MCP server providing Claude with a trained writing voice.
  humanURL: https://etincel.ai/connect
  aid: etincel-ai:tincel-mcp
x-enrichment:
  date: '2026-11-07'
  status: enriched
  artifacts_added: 21
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

Étincel API — frequently asked questions

Does Étincel have an API?

Yes. APIs.io lists 1 API from Étincel, including Étincel MCP.

How do I authenticate with the Étincel API?

Étincel documents its authentication (1 scheme). The details are profiled on APIs.io as Étincel Authentication.

Does Étincel have an MCP server?

Yes. APIs.io lists 1 MCP server for Étincel.

Is the Étincel API ready for AI agents?

Étincel has a Kin Score of 23.9 out of 100 (emerging) and an Agent Readiness score of 19.6 (agent-aware), scored by API Evangelist on 2026-11-13.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

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How their score was established

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