Cesanta

Cesanta is an embedded software and IoT company, established in 2013 to develop and support the Mongoose embedded web server and networking library (HTTP, WebSocket, MQTT, CoAP, TCP/IP) that ships in over 100 million devices from vendors such as Siemens, Bosch, Samsung, Schneider Electric, Broadcom, Google, and Caterpillar — and even runs aboard the International Space Station. Alongside the Mongoose library, Cesanta builds Mongoose OS (an IoT firmware development framework for ESP32, ESP8266, STM32 and other microcontrollers with AWS/Azure/Google Cloud integration), VCON.io (remote firmware update and automated firmware testing), and mDash — a managed IoT device cloud offering device management, over-the-air (OTA) updates, a device database/shadow, remote RPC, access control, and a documented REST API for programmatic fleet management.

Cesanta publishes 4 API contracts indexed on the APIs.io network, including Data API, Devices API, Keys API, and 1 more. Tagged areas include Company, IoT, Embedded, Device Management, and Firmware.

Cesanta’s developer surface includes engineering blog, authentication, documentation, API reference, getting-started guide, support, pricing, and 20 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

40.1/100 developing ▬ flat Agent 19/100 agent aware Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-10-17 · rubric v0.24.0

1 published contract

Company IoT Embedded Device Management Firmware OTA Networking MQTT

Kin Score

Kin Score How this is scored →
scored 2026-10-17 · rubric v0.24.0

Composite quality — 40.1/100 · developing

Contract Quality 9.9 / 19

Developer Ergonomics 8.8 / 15

Access Clarity 4.9 / 15

Operational Transparency 0.3 / 10

Contract Governance 0.4 / 9

Discoverability 5.5 / 8

Regulatory Posture 3.4 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 19/100 · agent aware

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 0 / 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 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

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 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/.

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 github.com/api-evangelist/cesanta: open an issue to ask a question, or submit a pull request to add artifacts. 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.

MQTT

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 4

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

Cesanta Data API

Device data storage and retrieval

Cesanta Devices API

Device registration, updates, RPC, and OTA

Cesanta Keys API

API key management

Cesanta Logs API

Notification logs

Open Collections 5

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

API Collection

OPEN COLLECTION

Cesanta mDash REST Data API

OPEN COLLECTION

Cesanta mDash REST Data Devices API

OPEN COLLECTION

Cesanta mDash REST Data Keys API

OPEN COLLECTION

Cesanta mDash REST Data Logs API

OPEN COLLECTION

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.

Cesanta Mdash Overlay

2 actions · update · cesanta-mdash-openapi.yml

UNRECORDED

Security Posture 2

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

Cesanta Authentication

http · 1 scheme

SECURITY

Cesanta Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Cesanta Agentic Access

12 operations · 7 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Login

Documentation 3

Reference material describing how the API behaves

OpenAPI

OpenAPI

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

LLMsTxt

WellKnown

AgentSkill

AgenticAccess

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

DataModel

Lifecycle

Conformance

Build 2

SDKs, sample code, and the tooling you integrate with

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: cesanta
name: Cesanta
description: Cesanta is an embedded software and IoT company, established in 2013 to develop and support the Mongoose embedded
  web server and networking library (HTTP, WebSocket, MQTT, CoAP, TCP/IP) that ships in over 100 million devices from vendors
  such as Siemens, Bosch, Samsung, Schneider Electric, Broadcom, Google, and Caterpillar — and even runs aboard the International
  Space Station. Alongside the Mongoose library, Cesanta builds Mongoose OS (an IoT firmware development framework for ESP32,
  ESP8266, STM32 and other microcontrollers with AWS/Azure/Google Cloud integration), VCON.io (remote firmware update and
  automated firmware testing), and mDash — a managed IoT device cloud offering device management, over-the-air (OTA) updates,
  a device database/shadow, remote RPC, access control, and a documented REST API for programmatic fleet management.
url: https://raw.githubusercontent.com/api-evangelist/cesanta/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: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://cesanta.com/images/logo1.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
tags:
- Company
- IoT
- Embedded
- Device Management
- Firmware
- OTA
- Networking
- MQTT
apis:
- aid: cesanta:cesanta-data-api
  name: Cesanta Data API
  description: Device data storage and retrieval
  humanURL: https://mdash.net/home/
  baseURL: https://dash.mongoose-os.com/api/v2
  tags:
  - Data
  properties:
  - type: OpenAPI
    url: openapi/cesanta-data-api-openapi.yml
  - type: APIReference
    url: https://mongoose-os.com/docs/mdash/api.md
- aid: cesanta:cesanta-devices-api
  name: Cesanta Devices API
  description: Device registration, updates, RPC, and OTA
  humanURL: https://mdash.net/home/
  baseURL: https://dash.mongoose-os.com/api/v2
  tags:
  - Devices
  properties:
  - type: OpenAPI
    url: openapi/cesanta-devices-api-openapi.yml
  - type: APIReference
    url: https://mongoose-os.com/docs/mdash/api.md
- aid: cesanta:cesanta-keys-api
  name: Cesanta Keys API
  description: API key management
  humanURL: https://mdash.net/home/
  baseURL: https://dash.mongoose-os.com/api/v2
  tags:
  - Keys
  properties:
  - type: OpenAPI
    url: openapi/cesanta-keys-api-openapi.yml
  - type: APIReference
    url: https://mongoose-os.com/docs/mdash/api.md
- aid: cesanta:cesanta-logs-api
  name: Cesanta Logs API
  description: Notification logs
  humanURL: https://mdash.net/home/
  baseURL: https://dash.mongoose-os.com/api/v2
  tags:
  - Logs
  properties:
  - type: OpenAPI
    url: openapi/cesanta-logs-api-openapi.yml
  - type: APIReference
    url: https://mongoose-os.com/docs/mdash/api.md
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- url: https://cesanta.com/blog/
  type: Blog
- type: OpenAPI
  url: openapi/_original/cesanta-mdash-openapi.yml
- type: Authentication
  url: authentication/cesanta-authentication.yml
- type: Conventions
  url: conventions/cesanta-conventions.yml
- type: ErrorCatalog
  url: errors/cesanta-problem-types.yml
- type: DataModel
  url: data-model/cesanta-data-model.yml
- type: Lifecycle
  url: lifecycle/cesanta-lifecycle.yml
- type: Conformance
  url: conformance/cesanta-conformance.yml
- type: X-MCPServerCandidate
  url: mcp/cesanta-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/cesanta-llms.txt
- type: Overlay
  url: overlays/cesanta-mdash-overlay.yaml
- type: Packages
  url: packages/cesanta-packages.yml
- type: WellKnown
  url: well-known/cesanta-well-known.yml
- type: AgentSkill
  url: skills/_index.yml
- type: AgenticAccess
  url: agentic-access/cesanta-agentic-access.yml
- type: DomainSecurity
  url: security/cesanta-domain-security.yml
- type: DeveloperPortal
  url: https://mdash.net/home/
- type: Documentation
  url: https://mongoose-os.com/docs/
- type: APIReference
  url: https://mongoose-os.com/docs/mdash/api.md
- type: GettingStarted
  url: https://mdash.net/home/tech-guides.html
- type: Support
  url: https://forum.mdash.net
- type: GitHubOrganization
  url: https://github.com/cesanta
- type: Pricing
  url: https://mdash.net/home/pricing.html
- type: Login
  url: https://mdash.net/login
- type: PrivacyPolicy
  url: https://cesanta.com/privacy.html
- type: TermsOfService
  url: https://mongoose-os.com/terms.html
- type: Website
  url: https://cesanta.com
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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