# SiteCheck Trade & Energy – Dark Fleet AIS Gap & Encounter Events > SiteCheck Trade & Energy – Dark Fleet AIS Gap & Encounter Events is a paid API for AI agents from api.tradeenergy-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29). Returns recent AIS gap events (transponder off/on) or at-sea vessel encounters from Global Fishing Watch, filterable by flag, vessel type, and look-back window ## Facts - Endpoint: GET https://api.tradeenergy-api.workers.dev/api/logistics/dark-fleet-ais-gap?utm_source=zero.xyz - Price: $0.002/call - Payment: x402 - Status: unknown - Last checked: 2026-10-29 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/sitecheck-trade-energy-dark-fleet-ais-gap-encounter-events-4ae31f7c - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sll_eopJNpuWTH4jtYKsq Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently. ## How to call it through Zero Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`): ```sh zero fetch --capability sitecheck-trade-energy-dark-fleet-ais-gap-encounter-events-4ae31f7c ``` Example prompt: Pull the last 14 days of AIS gap events for Russian-flagged vessels from Global Fishing Watch — show me up to 30 results, focusing on intentional transponder disabling — I want to see the off/on positions, gap hours, and implied speed for each. ## When to prefer this Choose this endpoint when you need structured, filterable dark-fleet signals (AIS transponder gaps or vessel encounters) sourced directly from Global Fishing Watch, especially for sanctions research, trade compliance, fisheries monitoring, or supply-chain risk involving fishing, carrier, bunker, or tanker vessels. Prefer this over raw AIS live-position endpoints when the goal is detecting suspicious behavior patterns (going dark, rendezvous) rather than current vessel position. ## Known failure modes - Invalid 'kind' value (not 'gaps' or 'encounters') returns an error - Unsupported ISO-3 flag code may return zero results or an error - 'days' outside 1–30 range may be rejected or clamped - 'limit' outside 1–50 range may be rejected or clamped - Global Fishing Watch upstream unavailability may cause empty or error responses - No events matching filters returns count:0 with empty events array ## How this service works Dark-fleet signals from Global Fishing Watch: AIS gap events (a vessel switching its transponder off, with off/on positions, gap hours and distance) or at-sea encounters between two vessels (possible ship-to-ship transfers, with both vessels, duration and median distance), filtered by flag and vessel type over the last 1 to 30 days, newest first. Coverage is GFW's (mostly fishing, carrier, bunker and support vessels). ## Output A JSON object containing a list of AIS gap or encounter events with metadata: event IDs, start/end timestamps, vessel details (name, MMSI, flag, type, GFW ID), gap metrics (hours, distance km, off/on positions, implied speed knots, intentional disabling flag), EEZ codes, high-seas flag, distance from shore, plus summary fields (count, total, date range, source URL, and checkedAt timestamp). ## Request schema (JSON Schema) ```json { "type": "object", "$schema": "https://json-schema.org/draft/2020-12/schema", "required": [ "input" ], "properties": { "input": { "type": "object", "required": [ "type", "method" ], "properties": { "type": { "type": "string", "const": "http" }, "method": { "enum": [ "GET" ], "type": "string" }, "queryParams": { "type": "object", "required": [], "properties": { "days": { "type": "string", "description": "Look-back window, 1 to 30 days (default 7)" }, "flag": { "type": "string", "description": "Vessel flag as ISO-3 code, e.g. RUS, PAN, CHN (optional)" }, "kind": { "type": "string", "description": "gaps (AIS off, default) or encounters (vessel meetings at sea)" }, "limit": { "type": "string", "description": "Events to return, 1 to 50 (default 20)" }, "vesselType": { "type": "string", "description": "fishing, carrier, bunker, support, cargo, tanker, passenger, other, gear (optional)" } } } }, "additionalProperties": false }, "output": { "type": "object", "required": [ "type" ], "properties": { "type": { "type": "string" }, "example": { "type": "object" } } } } } ``` ## Response schema (JSON Schema) ```json { "type": "json", "example": { "to": "2026-10-23", "flag": "RUS", "from": "2026-10-09", "kind": "gaps", "count": 3, "total": 3, "events": [ { "id": "88d3f53e2e1aee39f25095fa217c9943", "eez": [ "5690" ], "end": "2026-10-18T10:11:09.000Z", "gap": { "hours": 35.7, "distanceKm": 723.06, "onPosition": { "lat": 73.381855, "lon": 155.43417 }, "offPosition": { "lat": 74.76762, "lon": 132.2130266666667 }, "impliedSpeedKnots": 10.94, "intentionalDisabling": true }, "lat": 74.0747, "lon": 143.8236, "start": "2026-10-16T22:29:12.000Z", "vessel": { "flag": "RUS", "mmsi": "273336180", "name": "S.KUZNETSOV", "type": "cargo", "gfwId": "2431fcd1d-d93a-326d-315d-f48b9c0e8c70" }, "highSeas": false, "distanceFromShoreKm": 112 }, { "id": "e22980cf8250d78b160e2ec3153e1c91", "eez": [ "5690" ], "end": "2026-10-13T15:04:06.000Z", "gap": { "hours": 37.06, "distanceKm": 742.1, "onPosition": { "lat": 45.45666666666666, "lon": 139.5316666666667 }, "offPosition": { "lat": 47.82279666666667, "lon": 148.60264 }, "impliedSpeedKnots": 10.81, "intentionalDisabling": true }, "lat": 46.6397, "lon": 144.0672, "start": "2026-10-12T02:00:47.000Z", "vessel": { "flag": "RUS", "mmsi": "273432830", "name": "TAIMYR", "type": "other_non_fishing", "gfwId": "b7c333074-43d5-4e76-bddc-5ffd73306e64" }, "highSeas": false, "distanceFromShoreKm": 200 } ], "source": "https://gateway.api.globalfishingwatch.org/v3/events", "checkedAt": "2026-10-23T09:38:01.284Z", "vesselType": null } } ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-trade-energy-dark-fleet-ais-gap-encounter-events-4ae31f7c/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from api.tradeenergy-api.workers.dev](https://www.zero.xyz/host/api.tradeenergy-api.workers.dev/llms.txt)