Contacts

Merge duplicate contacts

Merge one or more groups of duplicate contacts. The request body is `{ contactIds: Group[] }` where each group is either a plain array of ≥2 contact IDs (the OLDEST record survives) or `{ contact_ids:

POST /v2/contacts/merge

Parameters

Header parameters

Idempotency-Key

string required

Required. UUID per logical operation, reused on every retry. See apps/rest-api/src/shared/idempotency.ts for the full contract. Missing → 400 BadRequest; same key + different body → 409 Conflict.

Request body

Content-Type: application/json

contactIds

array<array> required

Example

{
  "contactIds": [
    [
      "00000000-0000-0000-0000-000000000000"
    ]
  ]
}

Responses

200 — Successful response

Content-Type: application/json

data

object required

data.merged

array<object> required

data.merged[].id

string (uuid) required

data.merged[].user_id

string

data.merged[].first_name

string | null

data.merged[].last_name

string | null

data.merged[].full_name

string | null

data.merged[].description

string | null

data.merged[].job_title

string | null

data.merged[].company

string | null

data.merged[].education

string | null

data.merged[].legacy_location

string | null

data.merged[].image_url

string | null

data.merged[].business_card_url

string | null

data.merged[].website

string | null

data.merged[].image_source

string | null

data.merged[].birthday

string (date-time)

data.merged[].birthday_year

integer | null

data.merged[].linkedin

string | null

data.merged[].twitter

string | null

data.merged[].facebook

string | null

data.merged[].instagram

string | null

data.merged[].telegram

string | null

data.merged[].tiktok

string | null

data.merged[].youtube

string | null

data.merged[].starred

boolean

data.merged[].is_archived

boolean

data.merged[].ignore_merge

boolean

data.merged[].never_keep_in_touch

boolean

data.merged[].source

string

data.merged[].priority_tier

integer | null

data.merged[].frequency

string | null

data.merged[].frequency_text

string | null

data.merged[].last_seen_at

string (date-time)

data.merged[].last_reminder_at

string (date-time)

data.merged[].next_reminder_at

string (date-time)

data.merged[].first_met_at

string (date-time)

data.merged[].first_interaction_at

string (date-time)

data.merged[].linkedin_companies

string | null

data.merged[].linkedin_education

string | null

data.merged[].linkedin_enhance_date

string (date-time)

data.merged[].linkedin_last_message_at

string (date-time)

data.merged[].linkedin_last_message_snippet

string | null

data.merged[].linkedin_message_link

string | null

data.merged[].linkedin_urn

string | null

data.merged[].linkedin_headline

string | null

data.merged[].whatsapp_message_link

string | null

data.merged[].whatsapp_message_snippet

string | null

data.merged[].whatsapp_last_message_at

string (date-time)

data.merged[].imessage_message_link

string | null

data.merged[].imessage_message_snippet

string | null

data.merged[].imessage_last_message_at

string (date-time)

data.merged[].instagram_message_link

string | null

data.merged[].instagram_message_snippet

string | null

data.merged[].instagram_last_message_at

string (date-time)

data.merged[].gmail_last_interaction_at

string (date-time)

data.merged[].gmail_last_interaction_provider

string enum

Possible values: "GOOGLE", "OFFICE365"

data.merged[].gmail_last_interaction_provider_id

string | null

data.merged[].gmail_last_interaction_subject

string | null

data.merged[].gcal_last_interaction_at

string (date-time)

data.merged[].gcal_last_interaction_provider

string enum

Possible values: "GOOGLE", "OFFICE365"

data.merged[].gcal_last_interaction_provider_id

string | null

data.merged[].gcal_last_interaction_title

string | null

data.merged[].phone_call_interaction_snippet

string | null

data.merged[].phone_call_last_interaction_at

string (date-time)

data.merged[].web_search_summary

any | null

data.merged[].created_at

string (date-time)

data.merged[].updated_at

string (date-time)

data.merged[].geocode_attempts

integer

data.merged[].geocode_failed_at

string (date-time)

data.merged[]._count

object

data.merged[]._count.groups_contacts

integer

data.merged[].frequency_interval

any

data.merged[].linkedin_data

object | null

data.merged[].latitude

number | null

data.merged[].longitude

number | null

data.merged[].last_note

object | null

data.merged[].last_note.id

string (uuid)

data.merged[].last_note.preview

string

data.merged[].last_note.event_time

string (date-time)

data.merged[].last_note.emoji

string | null

data.merged[].last_note.meeting_type

string | null

data.merged[].contact_emails

array<object>

data.merged[].contact_phone_numbers

array<object>

data.merged[].contact_birthdays

object | null

data.merged[].contact_locations

array<object>

data.merged[].contacts_custom_fields

array<object>

data.merged[].legacy_contact_addresses

array<object>

data.merged[].groups_contacts

array<object>

data.merged[].tags_contacts

array<object>

data.merged[].timeline_items_contacts

array<object>

data.merged[].reminders_contacts

array<object>

data.merged[].contact_relations_contact_relations_sourceTocontacts

array<object>

data.merged[].contact_relations_contact_relations_destinationTocontacts

array<object>

data.merged[].feed_items

array<object>

data.merged[].keep_in_touch_reminders

object | null

data.failed

array<object> required

data.failed[].contactIds

array<string (uuid)> required

data.failed[].error

object required

data.failed[].error.code

string required

data.failed[].error.message

string required

Example

{
  "data": {
    "merged": [
      {
        "id": "00000000-0000-0000-0000-000000000000"
      }
    ],
    "failed": [
      {
        "contactIds": [
          "00000000-0000-0000-0000-000000000000"
        ],
        "error": {
          "code": "string",
          "message": "string"
        }
      }
    ]
  }
}

400 — Request body failed validation.

Content-Type: application/json

(body)

any

401 — Missing or invalid API key.

Content-Type: application/json

(body)

any

403 — Valid key, insufficient permission.

Content-Type: application/json

(body)

any

404 — Resource does not exist.

Content-Type: application/json

(body)

any

409 — Request conflicts with the current state of the resource.

Content-Type: application/json

(body)

any

429 — Rate limit exceeded.

Content-Type: application/json

(body)

any

500 — Unexpected server error.

Content-Type: application/json

(body)

any

Code samples

curl https://api.prod.getdex.com/v2/contacts/merge \
  --request POST \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
  "contactIds": [
    [
      "00000000-0000-0000-0000-000000000000"
    ]
  ]
}'

fetch('https://api.prod.getdex.com/v2/contacts/merge', {
  method: 'POST',
  headers: {
    Authorization: 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    contactIds: [
      {
        0: '00000000-0000-0000-0000-000000000000'
      }
    ]
  })
})

requests.post(
    "https://api.prod.getdex.com/v2/contacts/merge",
    headers={
      "Authorization": "Bearer YOUR_API_KEY",
      "Content-Type": "application/json"
    },
    json={
      "contactIds": [
        [
          "00000000-0000-0000-0000-000000000000"
        ]
      ]
    }
)

Bulk-delete contacts

Permanently delete multiple contacts in a single request. Returns `{ data: { affected, ids } }` where `ids` is the array of deleted contact IDs (echoed from the request body). `Idempotency-Key` is opt

Read or run Dex Research on a contact

Dex Research: a cited web research note about one contact (who they are, current focus, background, interests) plus structured findings (LinkedIn, website, email, phone) with per-finding confidence an