Textcortex

TextCortex is a Berlin-based AI writing and content-generation platform (ZenoChat assistant, knowledge bases, and a suite of writing tools) that also ships a public, OpenAI-compatible REST API. The API, served from https://api.textcortex.com/v1 with Bearer API-key authentication, exposes model discovery, chat completions, and an OpenAI Responses-compatible generation endpoint, plus an API-credit balance check. Streaming is supported over server-sent events and infrastructure is EU-hosted and GDPR-compliant. TextCortex is backed by Speedinvest and maintains first-party Python and JavaScript client libraries.

Textcortex publishes 4 API contracts indexed on the APIs.io network, including Balance API, Chat Completions API, Models API, and 1 more. Tagged areas include Company, Artificial Intelligence, Text Generation, LLM, and Chat Completions.

The Textcortex catalog on APIs.io includes 1 Spectral governance ruleset.

Textcortex’s developer surface includes engineering blog, authentication, support, pricing, signup flow, and 22 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

43.7/100 developing ▬ flat Agent 37/100 agent ready Front door AI 6/6 dominant Heartbeat 42/100 going silent saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract 2 Agent Skills

Company Artificial Intelligence Text Generation LLM Chat Completions OpenAI-Compatible Content Generation Developer Tools Foundation Models

What this lets a business do 2

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

AI Model Services

AE-110

Responses

POST /responses

Information & Data Management

BC-610

Chat Completions

POST /chat/completions

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 43.7/100 · developing

Contract Quality 9.6 / 19

Developer Ergonomics 6.3 / 15

Access Clarity 9.1 / 15

Operational Transparency 1.0 / 10

Contract Governance 1.6 / 9

Discoverability 5.5 / 8

Regulatory Posture 2.9 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 37/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 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 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 0 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the AI & Biometrics 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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
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
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

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 51.1 — up to +12.2 composite points
Operational Transparency scores 10.5 — up to +11.6 composite points
Developer Ergonomics scores 42.3 — up to +11.5 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/textcortex/apis.yml: open an issue on github.com/api-evangelist/textcortex 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Hugging Face Hub Organisations	builds-on	23.9	-	1

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

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.

The OpenAI Interface reaches extended

declared — publishes a spec that declares them

2 core of 338 operations graded · api-commons/models

OpenAPI

measured — observed by APIs.io (published)

APIs 4

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

Textcortex Balance API

Read API credit balance for the current API key.

Textcortex Chat Completions API

Generate chat completions with TextCortex models.

Textcortex Models API

Discover OpenAI-compatible TextCortex models.

Textcortex Responses API

Generate responses with TextCortex models.

Open Collections 4

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

TextCortex Balance API

OPEN COLLECTION

TextCortex Balance Chat Completions API

OPEN COLLECTION

TextCortex Balance Models API

OPEN COLLECTION

TextCortex Balance Responses API

OPEN COLLECTION

Agent Skills 2

Packaged agent skills for driving this provider's APIs from an AI assistant.

Generate a chat completion with TextCortex

AGENT SKILL

Generate text with the TextCortex Responses API

AGENT SKILL

Textcortex API pricing

Prices published by Textcortex, read 2026-10-07 from textcortex.com/pricing.

Plan	Price
FREE	$0/ month Includes: Knowledge Bases, Up to 50 MB storage for files, Create custom agents, Agent Skills and Connectors, D
PREMIUM	$29.99/ user/month Includes: Everything included in Free, Access to all major models, Included AI model usage, Up to 10 GB storag
ENTERPRISE	Let’s talk Includes: Everything included in Premium, SSO / SCIM / SAML, Dedicated deployment, Centralized billing, Priori

Plan details, limits and sources →

Billed by: user · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Textcortex Plans Pricing

3 plans

PLANS

Textcortex Price Estimates

0 plans

PLANS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Textcortex

SLA

FinOps 1

Cost, billing, and metering signals for API financial operations.

Textcortex Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Textcortex API Rules

56 rules · 54 errors 1 warnings 1 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Textcortex Openapi Overlay

4 actions · update · textcortex-openapi.json

DERIVED

Security Posture 2

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

Textcortex Authentication

http · 1 scheme

SECURITY

Textcortex Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Textcortex Agentic Access

5 operations · 2 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

SignUp

SignUp

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

WellKnown

WellKnown

X-MCPServerCandidate

X-MCPServerCandidate

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conformance

ErrorCatalog

Lifecycle

Conventions

DataModel

Build 4

SDKs, sample code, and the tooling you integrate with

Packages

Packages

SDKs

SDKs

GitHubOrganization

GitHubOrganization

Postman

Postman

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

StatusPage

StatusPage

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

Pricing

Pricing

TermsOfService

TermsOfService

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Source (apis.yml)

aid: textcortex
name: Textcortex
description: TextCortex is a Berlin-based AI writing and content-generation platform (ZenoChat assistant, knowledge bases,
  and a suite of writing tools) that also ships a public, OpenAI-compatible REST API. The API, served from https://api.textcortex.com/v1
  with Bearer API-key authentication, exposes model discovery, chat completions, and an OpenAI Responses-compatible generation
  endpoint, plus an API-credit balance check. Streaming is supported over server-sent events and infrastructure is EU-hosted
  and GDPR-compliant. TextCortex is backed by Speedinvest and maintains first-party Python and JavaScript client libraries.
url: https://raw.githubusercontent.com/api-evangelist/textcortex/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://docs.textcortex.com/logo192.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- speedinvest
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
x-docs-platform: stoplight
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-17
tags:
- Company
- Artificial Intelligence
- Text Generation
- LLM
- Chat Completions
- OpenAI-Compatible
- Content Generation
- Developer Tools
- Foundation Models
tags_raw:
- Company
- Artificial Intelligence
- Text Generation
- Large Language Models
- Chat Completions
- OpenAI-Compatible
- Content Generation
- Developer Tools
- Foundation Models
apis:
- aid: textcortex:textcortex-balance-api
  name: Textcortex Balance API
  description: Read API credit balance for the current API key.
  humanURL: https://docs.textcortex.com/
  baseURL: https://api.textcortex.com/v1
  tags:
  - Balances
  tags_raw:
  - Balance
  properties:
  - type: OpenAPI
    url: openapi/textcortex-balance-api-openapi.yml
  - type: Documentation
    url: https://docs.textcortex.com/
  - type: APIReference
    url: https://docs.textcortex.com/
  - type: GettingStarted
    url: https://help.textcortex.com/hc/en-us/articles/25546707607185-TextCortex-API-Deploy-AI-on-your-platform
- aid: textcortex:textcortex-chat-completions-api
  name: Textcortex Chat Completions API
  description: Generate chat completions with TextCortex models.
  humanURL: https://docs.textcortex.com/
  baseURL: https://api.textcortex.com/v1
  tags:
  - Chat Completions
  properties:
  - type: OpenAPI
    url: openapi/textcortex-chat-completions-api-openapi.yml
  - type: Documentation
    url: https://docs.textcortex.com/
  - type: APIReference
    url: https://docs.textcortex.com/
  - type: GettingStarted
    url: https://help.textcortex.com/hc/en-us/articles/25546707607185-TextCortex-API-Deploy-AI-on-your-platform
- aid: textcortex:textcortex-models-api
  name: Textcortex Models API
  description: Discover OpenAI-compatible TextCortex models.
  humanURL: https://docs.textcortex.com/
  baseURL: https://api.textcortex.com/v1
  tags:
  - Models
  properties:
  - type: OpenAPI
    url: openapi/textcortex-models-api-openapi.yml
  - type: Documentation
    url: https://docs.textcortex.com/
  - type: APIReference
    url: https://docs.textcortex.com/
  - type: GettingStarted
    url: https://help.textcortex.com/hc/en-us/articles/25546707607185-TextCortex-API-Deploy-AI-on-your-platform
- aid: textcortex:textcortex-responses-api
  name: Textcortex Responses API
  description: Generate responses with TextCortex models.
  humanURL: https://docs.textcortex.com/
  baseURL: https://api.textcortex.com/v1
  tags:
  - Responses
  properties:
  - type: OpenAPI
    url: openapi/textcortex-responses-api-openapi.yml
  - type: Documentation
    url: https://docs.textcortex.com/
  - type: APIReference
    url: https://docs.textcortex.com/
  - type: GettingStarted
    url: https://help.textcortex.com/hc/en-us/articles/25546707607185-TextCortex-API-Deploy-AI-on-your-platform
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/textcortex-plans-pricing.yml
- url: https://textcortex.com/blog
  type: Blog
- type: CapabilityMap
  url: capabilities/textcortex-capability-edges.yml
  name: Textcortex Business Capability Map
- type: Website
  url: https://www.textcortex.com/
- type: DomainSecurity
  url: security/textcortex-domain-security.yml
- type: AgenticAccess
  url: agentic-access/textcortex-agentic-access.yml
- type: Authentication
  url: authentication/textcortex-authentication.yml
- type: Packages
  url: packages/textcortex-packages.yml
- type: SDKs
  url: packages/textcortex-packages.yml
- type: WellKnown
  url: well-known/textcortex-well-known.yml
- type: X-MCPServerCandidate
  url: mcp/textcortex-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: LLMsTxt
  url: llms/textcortex-llms.txt
- type: Overlay
  url: overlays/textcortex-openapi-overlay.yaml
- type: Conformance
  url: conformance/textcortex-conformance.yml
- type: ErrorCatalog
  url: errors/textcortex-problem-types.yml
- type: Lifecycle
  url: lifecycle/textcortex-lifecycle.yml
- type: StatusPage
  url: https://status.textcortex.com/
- type: Conventions
  url: conventions/textcortex-conventions.yml
- type: DataModel
  url: data-model/textcortex-data-model.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DeveloperPortal
  url: https://docs.textcortex.com/
- type: Support
  url: https://help.textcortex.com/
- type: GitHubOrganization
  url: https://github.com/textcortex
- type: Pricing
  url: https://textcortex.com/pricing
- type: TermsOfService
  url: https://textcortex.com/terms-of-services
- type: SignUp
  url: https://app.textcortex.com/
- type: Postman
  url: https://www.postman.com/textcortex/textcortex-text-generation-api/overview
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 18
  pass: local-v1

Textcortex API — frequently asked questions

Does Textcortex have an API?

Yes. APIs.io lists 4 APIs from Textcortex, including Textcortex Balance API, Textcortex Chat Completions API and Textcortex Models API, and 1 more.

Is there an OpenAPI specification for the Textcortex API?

Yes. APIs.io indexes 4 OpenAPI specifications for Textcortex, each linked for download from this page.

How do I authenticate with the Textcortex API?

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

How much does the Textcortex API cost?

Textcortex publishes its prices; its FREE plan is $0/ month as of 2026-10-07. APIs.io lists 3 pricing plans for Textcortex, with each plan's price, limits and inclusions under Pricing on this page.

Is the Textcortex API ready for AI agents?

Textcortex has a Kin Score of 43.7 out of 100 (developing) and an Agent Readiness score of 37.2 (agent-ready), scored by API Evangelist on 2026-11-06.

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