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 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

38.8/100 thin ▬ flat Agent 25/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumSelf serveFree trial⚡ Free to try

1 APIs

Vessel Tracking AIS Maritime Maritime Data Weather CO2 EmissionsPort CongestionShip Tracking ETA Ocean Data

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 38.8/100 · thin

Contract Quality 12.6 / 23

Developer Ergonomics 3.6 / 18

Access Clarity 9.5 / 18

Operational Transparency 3.7 / 12

Contract Governance 0.0 / 11

Discoverability 6.2 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 25/100 · 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 0 / 8

Request/Response Examples 7 / 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

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/sinay: 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 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 8

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

API Collection

OPEN COLLECTION

Sinay Maritime APIs CO2 Emission API

OPEN COLLECTION

Sinay Maritime APIs CO2 Emission ETA API

OPEN COLLECTION

Sinay Maritime APIs CO2 Emission Metocean API

OPEN COLLECTION

Sinay Maritime APIs CO2 Emission Port Congestion API

OPEN COLLECTION

Sinay Maritime APIs CO2 Emission Ports and Vessels API

OPEN COLLECTION

Sinay Maritime APIs CO2 Emission Usage API

OPEN COLLECTION

Sinay Maritime APIs

OPEN COLLECTION

Scroll for all 8

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

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

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

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.
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: 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: '0.23'
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: CapabilityMap
  url: capabilities/sinay-capability-edges.yml
  name: Sinay Business Capability Map
- 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

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