Sinay (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.

APIs.json: https://raw.githubusercontent.com/api-evangelist/sinay/refs/heads/main/apis.yml

Access Model (read this first)

• Marketplace of per-product REST APIs. Every Sinay API is served over HTTPS from the single host api.sinay.ai, with each product mounted under its own versioned base path - e.g. https://api.sinay.ai/co2/api/v2 and https://api.sinay.ai/ports-vessels/api/v1.
• One auth scheme everywhere. All endpoints require an API key sent in an API_KEY request header. Get a free key from the Sinay Developers Platform.
• Per-API subscriptions / credits. Usage is metered as monthly API calls / API units (credits). Published tiers: a Free plan (~500 calls/month), a Pro plan (~10,000 calls/month), and a custom Enterprise plan, plus a no-credit-card free trial (~100 calls/month). Some endpoints consume more than one API unit per call. Each API reports its own consumption via a /usages endpoint (or /consumption on Port Congestion). Prices/currency are not reconciled here - confirm on the Developers Platform.
• REST only. No public WebSocket API is documented. A separate Webhooks API (container-tracking / Safecube surface) pushes events via HTTP POST to a subscriber endpoint; it is out of scope for the five maritime APIs profiled here.

This entry profiles five of Sinay's maritime-data APIs. The Swagger index at api.sinay.ai/doc also lists live specs for underwater noise, sailing schedules, Safecube Ports Intelligence (beta), container tracking, webhooks, and Safecube - not profiled separately here.

Tags

• Vessel Tracking
• AIS
• Maritime
• Maritime Data
• Weather
• CO2 Emissions
• Port Congestion
• Ship Tracking
• ETA
• Ocean Data

Timestamps

• Created: 2026-07-12
• Modified: 2026-07-12

APIs

Sinay Ports and Vessels API

Look up vessels by name, MMSI, or IMO and ports by name or UN/LOCODE from Sinay's maritime reference data, built on combined satellite and terrestrial AIS.

• Human URL: https://sinay.ai/en/sinay-hub/ports-and-vessels-api/
• Base URL: https://api.sinay.ai/ports-vessels/api/v1
• Endpoints: GET /vessels, GET /ports, GET /usages

Sinay Metocean API

Retrieve meteorological and oceanographic (weather and ocean) conditions for a geographic area and time window from a chosen model.

• Human URL: https://sinay.ai/en/sinay-hub/metocean-api/
• Base URL: https://api.sinay.ai/metocean/api/v1
• Endpoints: GET /models, POST /stations, GET /usages

Sinay CO2 Emission API

Compute the CO2 emissions of a container voyage between two ports for a given vessel (IMO or MMSI), returning voyage length and tons of CO2 per TEU via a vessel-model method and a GLEC Framework tradelane method (WTT/TTW/WTW).

• Human URL: https://sinay.ai/en/sinay-hub/co2-api/
• Base URL: https://api.sinay.ai/co2/api/v2
• Endpoints: POST /compute-co2, GET /usages

Sinay ETA API

Predict a vessel's estimated time of arrival to a destination port, routed from its latest AIS position or from a specified departure port and date.

• Human URL: https://sinay.ai/en/sinay-hub/eta-api/
• Base URL: https://api.sinay.ai/etac/api/v1
• Endpoints: POST /compute-eta, GET /usages

Sinay Port Congestion API

Retrieve aggregated live port congestion data for a single port by UN/LOCODE or up to ten ports at once, plus credit-consumption reporting.

• Human URL: https://sinay.ai/en/sinay-hub/port-congestion-api/
• Base URL: https://api.sinay.ai/congestion/api/v1
• Endpoints: GET /congestion/{portCode}, POST /congestion/batch, GET /consumption/current-period, GET /consumption/periods

Artifacts

• OpenAPI - consolidated description of all five APIs
• Postman Collection
• Open Collection
• Authentication
• Plans
• Rate Limits
• FinOps
• Domain Security
• Review

Common Properties

• Website
• Documentation
• Sign Up / Developers Platform
• LinkedIn

Grounding & Honesty Notes

• Endpoints, methods, the API_KEY header security scheme, and the CO2 / ETA / congestion request-response shapes were transcribed from the live per-product Swagger files at https://api.sinay.ai/<product>/api/<version>/swagger.yaml (confirmed 2026-07-12).
• In the consolidated OpenAPI, some response bodies (vessel/port records, metocean stations, ETA result, congestion aggregate) are represented as generic objects; the authoritative field-level schemas live in the upstream per-product Swagger.
• Pricing (plans, finops) is modeled from public descriptions of the Developers Platform and marked reconciled: false; per-unit prices, currency, and per-endpoint credit weightings are unverified.

Maintainers

FN: Kin Lane Email: kin@apievangelist.com