Sinay

Sinay is a maritime data and analytics company whose Developers Platform exposes a marketplace of REST APIs for the shipping and ocean-tech industry - vessel and port lookup from combined satellite and terrestrial AIS, metocean (weather and ocean) conditions, per-voyage CO2 emissions modeled on the GLEC Framework, ETA prediction, live port congestion, sailing schedules, and underwater noise. Every API is called over HTTPS at api.sinay.ai, authenticated with a single API_KEY header, and metered as monthly API units / credits with a free developer key to start.

Sinay publishes 6 APIs on the APIs.io network, including CO2 Emission API, ETA API, Metocean API, and 3 more. Tagged areas include Vessel Tracking, AIS, Maritime, Maritime Data, and Weather.

Sinay’s developer surface includes authentication, documentation, signup flow, and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub
43.2/100 thin ▬ flat Agent 48/100 agent ready Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessFreemiumSelf serveFree trial⚡ Free to try
6 APIs
Vessel TrackingAISMaritimeMaritime DataWeatherCO2 EmissionsPort CongestionShip TrackingETAOcean Data

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 43.2/100 · thin
Contract Quality 14.7 / 25
Developer Ergonomics 3.9 / 20
Commercial Clarity 10.5 / 20
Operational Transparency 4.1 / 13
Governance 0.0 / 12
Discoverability 10.0 / 10
Agent readiness — 48/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
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 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 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/sinay: 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 6

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

Sinay CO2 Emission API

Per-voyage CO2 emission computation using vessel-model and GLEC tradelane methods.

Sinay ETA API

Estimated time of arrival prediction for a vessel to a destination port.

Sinay Metocean API

Meteorological and oceanographic conditions for an area and time.

Sinay Port Congestion API

Aggregated live port congestion data.

Sinay Ports and Vessels API

Vessel and port lookup from combined satellite and terrestrial AIS.

Sinay Usage API

Monthly API usage and credit-consumption reporting.

Open Collections 1

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

Sinay Maritime APIs

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Sinay Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Sinay Rate Limits

3 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Sinay Finops

FINOPS

Security Posture 2

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

Sinay Authentication

apiKey · 1 scheme

SECURITY

Sinay Domain Security

TLSv1.3 · HSTS

SECURITY

Agentic Access 1

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

Sinay Agentic Access

14 operations · 4 acting

14 operations · 4 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

SignUp
SignUp

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans
Plans
 FinOps
FinOps

Company 2

The organization behind the API

Website
Website
 LinkedIn
LinkedIn

Source (apis.yml)

apis.yml Raw ↑ 
aid: sinay
url: https://raw.githubusercontent.com/api-evangelist/sinay/refs/heads/main/apis.yml
name: Sinay
kind: company
description: Sinay is a maritime data and analytics company whose Developers Platform exposes a marketplace of REST APIs for
  the shipping and ocean-tech industry - vessel and port lookup from combined satellite and terrestrial AIS, metocean (weather
  and ocean) conditions, per-voyage CO2 emissions modeled on the GLEC Framework, ETA prediction, live port congestion, sailing
  schedules, and underwater noise. Every API is called over HTTPS at api.sinay.ai, authenticated with a single API_KEY header,
  and metered as monthly API units / credits with a free developer key to start.
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: true
  try_now: true
  public: false
  label: Freemium (free trial) · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/sinay.png
tags:
- Vessel Tracking
- AIS
- Maritime
- Maritime Data
- Weather
- CO2 Emissions
- Port Congestion
- Ship Tracking
- ETA
- Ocean Data
created: '2026-07-12'
modified: '2026-07-12'
specificationVersion: '0.19'
apis:
- aid: sinay:sinay-co2-emission-api
  name: Sinay CO2 Emission API
  description: Per-voyage CO2 emission computation using vessel-model and GLEC tradelane methods.
  humanURL: https://sinay.ai/en/sinay-hub/ports-and-vessels-api/
  baseURL: https://api.sinay.ai/ports-vessels/api/v1
  tags:
  - CO2 Emission
  properties:
  - type: OpenAPI
    url: openapi/sinay-co2-emission-api-openapi.yml
  - type: Documentation
    url: https://help.sinay.ai/sinay-apis
  - type: APIReference
    url: https://api.sinay.ai/doc/index.html
  - type: PostmanCollection
    url: collections/sinay.postman_collection.json
  - type: OpenCollection
    url: collections/sinay.opencollection.json
- aid: sinay:sinay-eta-api
  name: Sinay ETA API
  description: Estimated time of arrival prediction for a vessel to a destination port.
  humanURL: https://sinay.ai/en/sinay-hub/ports-and-vessels-api/
  baseURL: https://api.sinay.ai/ports-vessels/api/v1
  tags:
  - ETA
  properties:
  - type: OpenAPI
    url: openapi/sinay-eta-api-openapi.yml
  - type: Documentation
    url: https://help.sinay.ai/sinay-apis
  - type: APIReference
    url: https://api.sinay.ai/doc/index.html
  - type: PostmanCollection
    url: collections/sinay.postman_collection.json
  - type: OpenCollection
    url: collections/sinay.opencollection.json
- aid: sinay:sinay-metocean-api
  name: Sinay Metocean API
  description: Meteorological and oceanographic conditions for an area and time.
  humanURL: https://sinay.ai/en/sinay-hub/ports-and-vessels-api/
  baseURL: https://api.sinay.ai/ports-vessels/api/v1
  tags:
  - Metocean
  properties:
  - type: OpenAPI
    url: openapi/sinay-metocean-api-openapi.yml
  - type: Documentation
    url: https://help.sinay.ai/sinay-apis
  - type: APIReference
    url: https://api.sinay.ai/doc/index.html
  - type: PostmanCollection
    url: collections/sinay.postman_collection.json
  - type: OpenCollection
    url: collections/sinay.opencollection.json
- aid: sinay:sinay-port-congestion-api
  name: Sinay Port Congestion API
  description: Aggregated live port congestion data.
  humanURL: https://sinay.ai/en/sinay-hub/ports-and-vessels-api/
  baseURL: https://api.sinay.ai/ports-vessels/api/v1
  tags:
  - Port Congestion
  properties:
  - type: OpenAPI
    url: openapi/sinay-port-congestion-api-openapi.yml
  - type: Documentation
    url: https://help.sinay.ai/sinay-apis
  - type: APIReference
    url: https://api.sinay.ai/doc/index.html
  - type: PostmanCollection
    url: collections/sinay.postman_collection.json
  - type: OpenCollection
    url: collections/sinay.opencollection.json
- aid: sinay:sinay-ports-and-vessels-api
  name: Sinay Ports and Vessels API
  description: Vessel and port lookup from combined satellite and terrestrial AIS.
  humanURL: https://sinay.ai/en/sinay-hub/ports-and-vessels-api/
  baseURL: https://api.sinay.ai/ports-vessels/api/v1
  tags:
  - Ports and Vessels
  properties:
  - type: OpenAPI
    url: openapi/sinay-ports-and-vessels-api-openapi.yml
  - type: Documentation
    url: https://help.sinay.ai/sinay-apis
  - type: APIReference
    url: https://api.sinay.ai/doc/index.html
  - type: PostmanCollection
    url: collections/sinay.postman_collection.json
  - type: OpenCollection
    url: collections/sinay.opencollection.json
- aid: sinay:sinay-usage-api
  name: Sinay Usage API
  description: Monthly API usage and credit-consumption reporting.
  humanURL: https://sinay.ai/en/sinay-hub/ports-and-vessels-api/
  baseURL: https://api.sinay.ai/ports-vessels/api/v1
  tags:
  - Usage
  properties:
  - type: OpenAPI
    url: openapi/sinay-usage-api-openapi.yml
  - type: Documentation
    url: https://help.sinay.ai/sinay-apis
  - type: APIReference
    url: https://api.sinay.ai/doc/index.html
  - type: PostmanCollection
    url: collections/sinay.postman_collection.json
  - type: OpenCollection
    url: collections/sinay.opencollection.json
common:
- type: AgenticAccess
  url: agentic-access/sinay-agentic-access.yml
- type: DomainSecurity
  url: security/sinay-domain-security.yml
- type: Authentication
  url: authentication/sinay-authentication.yml
- type: Website
  url: https://sinay.ai
- type: Documentation
  url: https://help.sinay.ai/sinay-apis
- type: SignUp
  url: https://developers.sinay.ai/
- type: LinkedIn
  url: https://www.linkedin.com/company/sinay
- type: Plans
  url: plans/sinay-plans-pricing.yml
- type: RateLimits
  url: rate-limits/sinay-rate-limits.yml
- type: FinOps
  url: finops/sinay-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com