OT Fabric

OT Fabric (otfabric.io) builds open-source, MIT-licensed, pure-Go protocol libraries, command-line tools and Dockerized interoperability test suites for industrial operational technology (OT): Modbus, OPC UA, BACnet/IP, IEC 60870-5-104, IEC 61850, Siemens S7, OpenADR, OCPP, DNP3, IEEE 2030.5, EtherNet/IP, PROFINET, CANopen on CAN bus and KNX, plus SunSpec Modbus and IEC 61850 information models and Sparkplug B over MQTT. Its stated goal is 'unified data for industrial operations': breaking down OT data silos so industrial data is easy to discover, access and use across systems, sites and teams. It publishes libraries and CLIs rather than a hosted web API.

OT Fabric is listed with 2 APIs on the APIs.io network. Tagged areas include Company, Industrial IoT, Operational Technology, Open Source, and Protocol.

OT Fabric’s developer surface includes CLI, changelog, sandbox, documentation, getting-started guide, engineering blog, support, and 14 more developer resources.

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16.8/100 emerging Agent 3/100 human only Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

2 APIs

Company Industrial IoT Operational Technology Open Source Protocol Modbus OPC UA Go CLIInteroperability Testing

Kin Score

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

Composite quality — 16.8/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 6.1 / 17

Access Clarity 0.0 / 17

Operational Transparency 2.0 / 11

Contract Governance 1.9 / 10

Discoverability 4.9 / 9

Regulatory Posture 1.6 / 15

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 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 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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
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
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
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

12 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
Access Clarity scores 0.0 — up to +20.0 composite points
Developer Ergonomics scores 35.7 — up to +12.9 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/otfabric/apis.yml: open an issue on github.com/api-evangelist/otfabric 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 2

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

OT Fabric Protocol Libraries and CLIs

Open-source, MIT-licensed pure-Go protocol libraries (Modbus, OPC UA, BACnet/IP, IEC 60870-5-104, IEC 61850, Siemens S7, OpenADR, OCPP, DNP3, IEEE 2030.5, EtherNet/IP, PROFINET,...

Modbus Simulator Control API

A small self-hosted HTTP control API served by the OT Fabric modbus-simulator when started with --control (the docs example binds 127.0.0.1:5021), so a test suite can reset or r...

OT Fabric API pricing

Pricing Plans 1

Published pricing tiers and plan structures.

Otfabric Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Otfabric Rate Limits

0 limits

RATE LIMITS

Security Posture 1

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

Otfabric Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Sandbox

Sandbox

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Conventions

Conventions

Lifecycle

Lifecycle

Conformance

Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

CLI

CLI

SDKs

SDKs

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

Support

Support

Company 4

The organization behind the API

Website

Website

Blog

Blog

About

About

LinkedIn

Other 3

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

RSSFeed

RSSFeed

Source (apis.yml)

aid: otfabric
name: OT Fabric
description: 'OT Fabric (otfabric.io) builds open-source, MIT-licensed, pure-Go protocol libraries, command-line tools and
  Dockerized interoperability test suites for industrial operational technology (OT): Modbus, OPC UA, BACnet/IP, IEC 60870-5-104,
  IEC 61850, Siemens S7, OpenADR, OCPP, DNP3, IEEE 2030.5, EtherNet/IP, PROFINET, CANopen on CAN bus and KNX, plus SunSpec
  Modbus and IEC 61850 information models and Sparkplug B over MQTT. Its stated goal is ''unified data for industrial operations'':
  breaking down OT data silos so industrial data is easy to discover, access and use across systems, sites and teams. It publishes
  libraries and CLIs rather than a hosted web API.'
url: https://artifacts.apis.io/otfabric/apis.yml
x-type: company
x-source: harvest:manual
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-03 (modular-v1; was harvest)
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  probe_state: covered
  source:
  - security
  - sandbox
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.20'
created: '2026-11-03'
modified: '2026-11-03'
tags:
- Company
- Industrial IoT
- Operational Technology
- Open Source
- Protocol
- Modbus
- OPC UA
- Go
- CLI
- Interoperability Testing
tags_raw:
- Company
- Industrial IoT
- Operational Technology
- Open Source
- Protocols
- Modbus
- OPC UA
- Go
- CLI
- Interoperability Testing
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
image: https://otfabric.io/og-image.png
common:
- type: CLI
  url: cli/otfabric-cli.yml
- type: ChangeLog
  url: changelog/otfabric-changelog.yml
- type: Conventions
  url: conventions/otfabric-conventions.yml
- type: Sandbox
  url: sandbox/otfabric-sandbox.yml
- type: Lifecycle
  url: lifecycle/otfabric-lifecycle.yml
- type: Conformance
  url: conformance/otfabric-conformance.yml
- type: LLMsTxt
  url: llms/otfabric-llms.txt
- type: Hosts
  url: hosts/otfabric-hosts.yml
- type: Vendors
  url: vendors/otfabric-vendors.yml
- type: SDKs
  url: packages/otfabric-packages.yml
- type: Packages
  url: packages/otfabric-packages.yml
- type: DomainSecurity
  url: security/otfabric-domain-security.yml
- type: Website
  url: https://otfabric.io/
- type: Documentation
  url: https://otfabric.io/docs/
- type: GettingStarted
  url: https://otfabric.io/docs/getting-started/
- type: Blog
  url: https://otfabric.io/blog/
- type: RSSFeed
  url: https://otfabric.io/blog/rss.xml
- type: GitHubOrganization
  url: https://github.com/otfabric
- type: Support
  url: https://otfabric.io/contact/
- type: About
  url: https://otfabric.io/about/
- type: LinkedIn
  url: https://www.linkedin.com/company/otfabric
apis:
- aid: otfabric:otfabric-protocol-libraries
  name: OT Fabric Protocol Libraries and CLIs
  description: Open-source, MIT-licensed pure-Go protocol libraries (Modbus, OPC UA, BACnet/IP, IEC 60870-5-104, IEC 61850,
    Siemens S7, OpenADR, OCPP, DNP3, IEEE 2030.5, EtherNet/IP, PROFINET, CANopen, CAN bus, KNX, SunSpec, Sparkplug B), with
    matching command-line tools and Dockerized interoperability test suites. These are programmatic library interfaces documented
    per protocol on otfabric.io and in each repository's API.md; OT Fabric does not operate a hosted web API, so there is
    no base URL and no published OpenAPI, AsyncAPI, GraphQL, gRPC or WSDL contract of its own.
  humanURL: https://otfabric.io/docs/
  tags:
  - Industrial IoT
  - Protocol
  - Go
  - Open Source
  tags_raw:
  - Industrial IoT
  - Protocols
  - Go
  - Open Source
  properties:
  - type: Documentation
    url: https://otfabric.io/docs/
  - type: GettingStarted
    url: https://otfabric.io/docs/getting-started/
  - type: GitHubOrganization
    url: https://github.com/otfabric
- aid: otfabric:modbus-simulator-control-api
  name: Modbus Simulator Control API
  description: 'A small self-hosted HTTP control API served by the OT Fabric modbus-simulator when started with --control
    (the docs example binds 127.0.0.1:5021), so a test suite can reset or reload the simulated devices between cases: POST
    /reset, POST /reset?unit=N, POST /reload and GET /healthz. It runs on the user''s own machine; there is no provider-hosted
    base URL.'
  humanURL: https://otfabric.io/docs/protocols/modbus/testing/
  tags:
  - Modbus
  - Testing
  - Self-Hosted
  properties:
  - type: Documentation
    url: https://otfabric.io/docs/protocols/modbus/testing/
  - type: GitHubRepository
    url: https://github.com/otfabric/modbus-simulator
x-coverage:
  state: covered
  reason: identity-verified
  detail: 'Identity read from https://otfabric.io/ (title "OT Fabric: unified data for industrial operations", footer "© 2026
    OT Fabric"). No pricing, terms, privacy, API reference or hosted API pages are linked from the site.'
  evidence:
  - url: https://otfabric.io/
    status: 200
  - url: https://otfabric.io/docs/
    status: 200
  - url: https://otfabric.io/docs/getting-started/
    status: 200
  - url: https://otfabric.io/blog/
    status: 200
  - url: https://otfabric.io/blog/rss.xml
    status: 200
  - url: https://otfabric.io/contact/
    status: 200
  - url: https://otfabric.io/about/
    status: 200
  - url: https://otfabric.io/og-image.png
    status: 200
  - url: https://github.com/otfabric
    status: 200
  - url: https://www.linkedin.com/company/otfabric
    status: 200
x-enrichment:
  date: '2026-11-03'
  status: enriched
  artifacts_added: 27
  pass: modular-v1
  engine: identity=anthropic,contract=anthropic,surfaces=anthropic,docs=anthropic,regulatory=anthropic

OT Fabric API — frequently asked questions

Does OT Fabric have an API?

Yes. APIs.io lists 2 APIs from OT Fabric, including OT Fabric Protocol Libraries and CLIs and Modbus Simulator Control API.

Is the OT Fabric API ready for AI agents?

OT Fabric has a Kin Score of 16.8 out of 100 (emerging) and an Agent Readiness score of 2.5 (human-only), scored by API Evangelist on 2026-11-06.

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apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
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