IMO Lookup

GET/v1/maritime/vessels/imo/{imo}$0.01 per call

Look up a vessel by IMO number.

Parameters

Name	In	Type	Description
imorequired	path	string

Response fields

Field	Type	Description
success	boolean	e.g. `true`
imo	string	e.g. `9811000`
found	boolean	e.g. `true`
vessel	object
vessel.vesselName	string	e.g. `EVER GIVEN`
vessel.imoNumber	string	e.g. `9811000`
vessel.mmsi	string	e.g. `353136000`
vessel.callSign	string	e.g. `3EQJ5`
vessel.flag	string	e.g. `Panama`
vessel.vesselType	string	e.g. `Container Ship`
vessel.grossTonnage	number	e.g. `220940`
vessel.yearBuilt	string	e.g. `2018`
vessel.ownerName	string	e.g. `SHOEI KISEN KAISHA`
vessel.portOfRegistry	string	e.g. `Panama City`
vessel.status	string	e.g. `Active`
dataSource	object
dataSource.name	string	e.g. `ComplianceGrid Maritime Registry (development seed data)`
dataSource.note	string	e.g. `A small sample of vessels only. No live vessel feed (USCG PSI…`
meta	object
meta.dataSource	object
meta.dataSource.name	string	e.g. `ComplianceGrid Maritime Registry (development seed data)`
meta.dataSource.provenance	string	e.g. `seed`
meta.dataSource.note	string	e.g. `A small sample of vessels only. No live vessel feed (USCG PSI…`

Fields are read from a real response captured 2026-11-04, shortened. Optional fields may be absent in other responses.

Errors

400 invalid request
401 missing or bad key
403 not in your plan
429 rate limited, see Retry-After
402 payment required
5xx retry with backoff

Error bodies and codes are described in Error codes and troubleshooting.

curl "https://api.compliancegrid.ai/v1/maritime/vessels/imo/9811000" \
  -H "Authorization: Bearer $CG_API_KEY"

Try it in the sandbox

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imo (path, required)

Example response · captured from production 2026-11-04 · shortened

{
  "success": true,
  "imo": "9811000",
  "found": true,
  "vessel": {
    "vesselName": "EVER GIVEN",
    "imoNumber": "9811000",
    "mmsi": "353136000",
    "callSign": "3EQJ5",
    "flag": "Panama",
    "vesselType": "Container Ship",
    "grossTonnage": 220940,
    "yearBuilt": "2018",
    "ownerName": "SHOEI KISEN KAISHA",
    "portOfRegistry": "Panama City",
    "status": "Active"
  },
  "dataSource": {
    "name": "ComplianceGrid Maritime Registry (development seed data)",
    "note": "A small sample of vessels only. No live vessel feed (USCG PSIX, MarineTraffic, ITU MARS) is connected, so a vessel that is not in the sample is simply not found; that says nothing about whether it exists or is sanctio…"
  },
  "meta": {
    "dataSource": {
      "name": "ComplianceGrid Maritime Registry (development seed data)",
      "provenance": "seed",
      "note": "A small sample of vessels only. No live vessel feed (USCG PSIX, MarineTraffic, ITU MARS) is connected, so a vessel that is not in the sample is simply not found; that says nothing about whether it exists or is sanctio…"
    }
  }
}