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
46.9/100 developing ▬ flat Agent 69/100 agent native Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
4 APIs 1 MCP Servers
CompanyIoTEmbeddedDevice ManagementFirmwareOTANetworkingMQTT

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 46.9/100 · developing
Contract Quality 14.3 / 25
Developer Ergonomics 13.0 / 20
Commercial Clarity 8.9 / 20
Operational Transparency 0.7 / 13
Governance 0.0 / 12
Discoverability 10.0 / 10
Agent readiness — 69/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 12 / 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 4 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. 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. Want it done for you? Prioritized profiling — $2,500 →

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

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

cesanta-mcp.yml

MCP SERVER

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

MCPServer
MCPServer
 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
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  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: '0.20'
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/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: MCPServer
  url: mcp/cesanta-mcp.yml
- 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