Datadef

Datadef provides AI‑powered diagram generation for architecture, ERD, and cloud infrastructure. It offers free tools and extensive icon libraries for AWS, GCP, and Azure, along with guides on data platforms, data mesh, medallion architecture, and best practices for data quality, lineage, and contracts. The service aims to help data engineers quickly document and visualize their data stacks.

Datadef is listed with 2 APIs on the APIs.io network. Tagged areas include Data Engineering, AI Tools, Diagramming, Cloud Architecture, and Open Source.

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

Datadef’s developer surface includes documentation, getting-started guide, engineering blog, pricing, and 13 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

32.4/100 thin Agent 33/100 agent ready Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemium

2 APIs

Data Engineering AI Tools DiagrammingCloud ArchitectureOpen Source

Kin Score

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

Composite quality — 32.4/100 · thin

Contract Quality 2.2 / 21

Developer Ergonomics 4.0 / 17

Access Clarity 13.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 2.2 / 10

Discoverability 4.9 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 33/100 · agent ready

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 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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
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)

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 10.5 — up to +22.4 composite points
Developer Ergonomics scores 23.8 — up to +15.2 composite points
Operational Transparency scores 0.0 — up to +13.0 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/datadef-io/apis.yml: open an issue on github.com/api-evangelist/datadef-io 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.

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

APIs 2

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

Datadef API

Datadef provides an API documented at their developer portal, but no machine‑readable contract was found.

Datadef API

Datadef API as documented publicly: 5 operations. Contract generated from the documentation by API Evangelist (2026-11-05); not the provider's own document.

Datadef API pricing

Prices published by Datadef, read 2026-11-05 from datadef.io/pricing.

Plan	Price
Free	$0
Pro	$12/month, or $96/year ($8/month)
Team	$99/month

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Datadef Io Plans Pricing

3 plans

PLANS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Datadef API Rules

34 rules · 32 errors 1 warnings 1 info

SPECTRAL

Security Posture 1

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

Datadef Io Domain Security

TLSv1.3 · HSTS

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login

GettingStarted

GettingStarted

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

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Spectral

Spectral

Vocabulary

Vocabulary

Conformance

Conformance

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 4

Pricing, plans, and the legal terms of use

Plans

TermsOfService

PrivacyPolicy

Pricing

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: datadef-io
name: Datadef
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  probe_state: unreadable
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
image: https://datadef.io/datadef_logo_with_name_rectangle.png
description: Datadef provides AI‑powered diagram generation for architecture, ERD, and cloud infrastructure. It offers free
  tools and extensive icon libraries for AWS, GCP, and Azure, along with guides on data platforms, data mesh, medallion architecture,
  and best practices for data quality, lineage, and contracts. The service aims to help data engineers quickly document and
  visualize their data stacks.
url: https://artifacts.apis.io/datadef-io/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-05 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-04'
modified: '2026-11-04'
tags:
- Data Engineering
- AI Tools
- Diagramming
- Cloud Architecture
- Open Source
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/datadef-io-plans-pricing.yml
- type: Spectral
  url: rules/datadef-io-rules.yml
- type: Vocabulary
  url: vocabulary/datadef-io-vocabulary.yml
- type: Conformance
  url: conformance/datadef-io-conformance.yml
- type: LLMsTxt
  url: llms/datadef-io-llms.txt
- type: WellKnown
  url: well-known/datadef-io-well-known.yml
- type: Hosts
  url: hosts/datadef-io-hosts.yml
- type: Vendors
  url: vendors/datadef-io-vendors.yml
- type: TermsOfService
  url: https://datadef.io/terms
- type: PrivacyPolicy
  url: https://datadef.io/privacy
- type: Login
  url: https://datadef.io/auth/signin
- type: DomainSecurity
  url: security/datadef-io-domain-security.yml
- type: Website
  url: https://datadef.io/
- type: Documentation
  url: https://datadef.io/docs
- type: GettingStarted
  url: https://datadef.io/docs/getting-started
- type: Blog
  url: https://blog.datadef.io
- type: Pricing
  url: https://datadef.io/pricing
apis:
- name: Datadef API
  description: Datadef provides an API documented at their developer portal, but no machine‑readable contract was found.
  humanURL: https://datadef.io/docs
  baseURL: null
  aid: datadef-io:datadef-api
- aid: datadef-io:datadef-io-api
  name: Datadef API
  description: 'Datadef API as documented publicly: 5 operations. Contract generated from the documentation by API Evangelist
    (2026-11-05); not

    the provider''s own document.'
  humanURL: https://datadef.io/guides/en/what-is-data-lineage
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/datadef-io-openapi-generated.yml
    x-provenance: generated
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: Documentation pages are public but no OpenAPI, AsyncAPI, GraphQL, gRPC, or WSDL contract could be found despite
    probing all known locations.
  evidence:
  - url: https://datadef.io/docs
    status: 200
  checked: '2026-11-05'
x-enrichment:
  date: '2026-11-05'
  status: enriched
  artifacts_added: 19
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Datadef API — frequently asked questions

Does Datadef have an API?

Yes. APIs.io lists 2 APIs from Datadef, including Datadef API and Datadef API.

Is there an OpenAPI specification for the Datadef API?

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

How much does the Datadef API cost?

Datadef publishes its prices; its Free plan is $0 as of 2026-11-05. APIs.io lists 3 pricing plans for Datadef, with each plan's price, limits and inclusions under Pricing on this page.

Is the Datadef API ready for AI agents?

Datadef has a Kin Score of 32.4 out of 100 (thin) and an Agent Readiness score of 33.1 (agent-ready), scored by API Evangelist on 2026-11-06.

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.

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