Cesanta website screenshot

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 APIs 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 authentication, documentation, API reference, getting-started guide, support, pricing, and 20 more developer resources.

🌐 Visit website 📡 Source on GitHub
40.2/100 developing ▬ flat Agent 21/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
1 APIs
CompanyIoTEmbeddedDevice ManagementFirmwareOTANetworkingMQTT

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 40.2/100 · developing
Contract Quality 13.1 / 23
Developer Ergonomics 10.2 / 18
Access Clarity 5.9 / 18
Operational Transparency 0.3 / 12
Contract Governance 0.5 / 11
Discoverability 6.8 / 9
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 21/100 · 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
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.
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 →

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

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 · 8 acting

12 operations · 8 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 Login
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
X-MCPServerCandidate
 LLMsTxt
LLMsTxt
 WellKnown
WellKnown
 AgentSkill
AgentSkill
 AgenticAccess
AgenticAccess

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 ErrorCatalog
ErrorCatalog
 DataModel
DataModel
 Lifecycle
Lifecycle
 Conformance
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 1

The organization behind the API

Website
Website

Other 1

Properties that don't map to a standard resource type

Overlay
Overlay

Source (apis.yml)

apis.yml Raw ↑ 
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: '2026-07-18'
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:
- 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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