Overview - Qomon API Hub

The search API lets you query your contacts using a flexible condition-based language. You can filter by any combination of personal info, address, tags, financial activity (transactions, donations, memberships), email campaign engagement, sanctions, and custom fields. Two endpoints share the same query format:

POST /search — returns a paginated list of matching contacts
POST /kpi — returns only the count of matching contacts, with no contact data

How queries are structured

Every search query is a two-level tree. The outer group sets the top-level logic; each inner group contains the individual conditions.

query
└── $all (AND) or $at_least_one (OR)          ← outer group
    ├── $all or $at_least_one                  ← inner group
    │   ├── $condition { attr, ope, value }
    │   └── $condition { attr, ope, value }
    └── $all or $at_least_one                  ← inner group
        └── $condition { attr, ope, value }

Each group is either:

$all — ALL conditions inside must match (AND logic)
$at_least_one — AT LEAST ONE condition must match (OR logic)

The minimum shape — even for a single condition — always requires two levels of nesting:

{
  "data": {
    "advanced_search": {
      "per_page": 100,
      "query": {
        "$all": [
          {
            "$all": [
              { "$condition": { "attr": "address.city", "ope": "eql", "value": "Paris" } }
            ]
          }
        ]
      }
    }
  }
}

Example: City is Paris AND has a mobile number AND (tagged volunteer OR tagged donor)

{
  "data": {
    "advanced_search": {
      "per_page": 100,
      "query": {
        "$all": [
          {
            "$all": [
              { "$condition": { "attr": "address.city", "ope": "eql", "value": "Paris" } },
              { "$condition": { "attr": "mobile", "ope": "ext" } }
            ]
          },
          {
            "$at_least_one": [
              { "$condition": { "attr": "tags.name", "ope": "eql", "value": "volunteer" } },
              { "$condition": { "attr": "tags.name", "ope": "eql", "value": "donor" } }
            ]
          }
        ]
      }
    }
  }
}

Operators

What you want to say	`ope` value
equals	`eql`
does not equal	`not_eql`
has a value / is filled in	`ext`
has no value / is empty	`not_ext`
is before / at most	`lte`
is after / at least	`gte`
is between two values	`range` — use with `from` and `to`
contains the text	`contains`
does not contain the text	`not_contains`
starts with	`start_with`
does not start with	`not_start_with`
equals (case-sensitive, exact match)	`eql:strictdata`
matches any of a list	`any_of`
matches none of a list	`none_of`
matches all of a list	`all_of`

Date fields accept relative values: "now", "now-30d", "now-1y", "now+1y". All dates are interpreted as UTC.

Pagination and sorting

Parameter	Description
`per_page`	Contacts per page — required, 1–1000
`page`	Page number (default: 0)
`sort_attr`	Sort by: `surname`, `firstname`, `birthdate`, `gender`, `lastchange`, `mail`, `married_name`, `city`
`sort_asc`	`true` = ascending order (default: false)
`include_interactions`	`true` = include each contact’s interaction history in the response

Getting a count without results

Use POST /kpi with the same query body to get the number of matching contacts instantly without fetching the full contact list.

{ "data": { "advanced_search": { "query": { "$all": [ ... ] } } } }

Response: { "data": { "total": 1042 }, "status": "success" }

Examples

Active memberships today

Contacts whose membership started on or before today and ends on or after today.

{
  "data": {
    "advanced_search": {
      "per_page": 100,
      "query": {
        "$all": [{
          "$all": [
            { "$condition": { "attr": "memberships.start_date", "ope": "lte", "value": "now" } },
            { "$condition": { "attr": "memberships.end_date",   "ope": "gte", "value": "now" } }
          ]
        }]
      }
    }
  }
}

Donors with cumulative amount ≥ €100

Amount values are always passed as strings in euros.

{
  "data": {
    "advanced_search": {
      "per_page": 100,
      "query": {
        "$all": [{
          "$all": [
            { "$condition": { "attr": "donations.sum_amount", "ope": "gte", "value": "100" } }
          ]
        }]
      }
    }
  }
}

Email delivered but not opened (campaign 42)

{
  "data": {
    "advanced_search": {
      "per_page": 100,
      "query": {
        "$all": [{
          "$all": [
            { "$condition": { "attr": "emails.campaign_id",  "ope": "eql",     "value": "42" } },
            { "$condition": { "attr": "emails.delivered_at", "ope": "ext" } },
            { "$condition": { "attr": "emails.opened_at",    "ope": "not_ext" } }
          ]
        }]
      }
    }
  }
}

Two independent AND groups

Members in 2024 who also made at least one donation.

{
  "data": {
    "advanced_search": {
      "per_page": 100,
      "query": {
        "$all": [
          {
            "$all": [
              { "$condition": { "attr": "memberships.period", "ope": "eql", "value": "2024" } }
            ]
          },
          {
            "$all": [
              { "$condition": { "attr": "donations.count_amount", "ope": "gte", "value": "1" } }
            ]
          }
        ]
      }
    }
  }
}

OR on cities combined with an AND condition

In Paris or Lyon, and has a mobile number.

{
  "data": {
    "advanced_search": {
      "per_page": 100,
      "query": {
        "$all": [
          {
            "$at_least_one": [
              { "$condition": { "attr": "address.city", "ope": "eql", "value": "Paris" } },
              { "$condition": { "attr": "address.city", "ope": "eql", "value": "Lyon" } }
            ]
          },
          {
            "$all": [
              { "$condition": { "attr": "mobile", "ope": "ext" } }
            ]
          }
        ]
      }
    }
  }
}

Filter by form answer (consent, custom field…)

Use GET /v1/forms/type/{type} to find your form_id, then GET /forms/{id} for form_ref_ids.

{
  "data": {
    "advanced_search": {
      "per_page": 100,
      "query": {
        "$all": [{
          "$all": [{
            "$condition": {
              "attr": "form",
              "form_id": 4530,
              "form_ref_ids": [7486],
              "ope": "eql",
              "value": "consent_email"
            }
          }]
        }]
      }
    }
  }
}

Attribute reference

Contact fields

Attribute	Meaning	Operators
`firstname`	First name	`eql`, `not_eql`, `ext`, `not_ext`, `start_with`, `not_start_with`
`surname`	Last name	`eql`, `not_eql`, `ext`, `not_ext`, `start_with`, `not_start_with`
`married_name`	Married name	`eql`, `not_eql`, `ext`, `not_ext`, `start_with`, `not_start_with`
`gender`	Gender (`M`, `F`, `O`)	`eql`, `not_eql`, `ext`, `not_ext`
`birthdate`	Date of birth	`eql`, `ext`, `not_ext`, `range`, `lte`, `gte`
`age_cat`	Age category (0–6)	`eql`, `not_eql`, `ext`, `not_ext`
`birthcity`	City of birth	`eql`, `not_eql`, `ext`, `not_ext`
`birthcountry`	Country of birth	`eql`, `not_eql`, `ext`, `not_ext`
`nationality`	Nationality	`eql`, `not_eql`, `ext`, `not_ext`
`mail`	Email address	`eql:strictdata`, `not_eql:strictdata`, `ext`, `not_ext`, `start_with`, `not_start_with`
`phone`	Landline	`eql`, `not_eql`, `ext`, `not_ext`, `start_with`, `not_start_with`
`mobile`	Mobile number	`eql`, `not_eql`, `ext`, `not_ext`, `contains`, `start_with`, `not_start_with`
`tags.name`	Tag name	`eql`, `not_eql`, `any_of`, `none_of`, `all_of`, `ext`, `not_ext`
`black_list`	Blocked from all communication	`eql`, `not_eql`
`lastchange`	Last modification date	`eql`, `ext`, `not_ext`, `range`, `lte`, `gte`
`user_id`	ID of last user who edited the contact	`eql`, `not_eql`, `ext`, `not_ext`
`user_contact_id`	ID of the linked Qomon user	`ext`, `not_ext`
`action_ids`	IDs of linked actions	`eql`, `not_eql`

Address fields

Attribute	Meaning	Operators
`address.city`	City	`eql`, `not_eql`, `ext`, `not_ext`, `start_with`, `not_start_with`
`address.postalcode`	Postal code	`eql`, `not_eql`, `ext`, `not_ext`, `start_with`, `not_start_with`
`address.country`	Country	`eql`, `not_eql`, `ext`, `not_ext`
`address.street`	Street name	`eql`, `not_eql`, `ext`, `not_ext`, `start_with`, `not_start_with`
`address.housenumber`	House number	`eql`, `not_eql`, `ext`, `not_ext`
`address.building`	Building	`eql`, `not_eql`, `ext`, `not_ext`
`address.floor`	Floor	`eql`, `not_eql`, `ext`, `not_ext`
`address.door`	Door	`eql`, `not_eql`, `ext`, `not_ext`
`address.addition`	Address complement	`eql`, `not_eql`, `ext`, `not_ext`
`address.pollingstation`	Polling station	`eql`, `not_eql`, `any_of`, `none_of`, `ext`, `not_ext`
`address.invalid`	Address flagged as invalid	`eql`, `not_eql`, `ext`, `not_ext`

Financial fields

These fields match contacts who have at least one matching record. For example, transactions.amount gte "50" returns contacts with at least one transaction ≥ €50, not contacts whose total is ≥ €50 — use sum_amount for totals. Amount fields are in euros and must always be passed as strings: "value": "50" not "value": 50.

Transactions (transactions.*)

Attribute	Meaning	Operators
`transactions.created_at`	Record creation date	`lte`, `gte`, `range`
`transactions.date`	Transaction execution date	`eql`, `not_eql`, `lte`, `gte`, `range`
`transactions.amount`	Amount of one transaction (€)	`eql`, `not_eql`, `lte`, `gte`, `range`
`transactions.sum_amount`	Total amount across all transactions (€)	`eql`, `not_eql`, `lte`, `gte`, `range`
`transactions.count_amount`	Number of transactions	`eql`, `not_eql`, `lte`, `gte`, `range`
`transactions.code_campaign`	Campaign code	`ext`, `not_ext`, `eql`, `not_eql`, `contains`, `not_contains`, `start_with`, `not_start_with`
`transactions.payment_method_kind`	Payment method	`eql`, `not_eql`
`transactions.status_id`	Transaction status ID	`eql`, `not_eql`

Donations (donations.*)

Attribute	Meaning	Operators
`donations.created_at`	Record creation date	`eql`, `not_eql`, `lte`, `gte`, `range`
`donations.transaction_date`	Donation operation date	`eql`, `not_eql`, `lte`, `gte`, `range`
`donations.amount`	Amount of one donation (€)	`eql`, `not_eql`, `lte`, `gte`, `range`
`donations.sum_amount`	Total donated (€)	`eql`, `not_eql`, `lte`, `gte`, `range`
`donations.count_amount`	Number of donations	`eql`, `not_eql`, `lte`, `gte`, `range`
`donations.donation_price_id`	Donation type/tier ID	`eql`, `not_eql`

Memberships (memberships.*)

Attribute	Meaning	Operators
`memberships.created_at`	Record creation date	`eql`, `not_eql`, `lte`, `gte`, `range`
`memberships.start_date`	Membership start date	`eql`, `not_eql`, `lte`, `gte`, `range`
`memberships.end_date`	Membership end date	`eql`, `not_eql`, `lte`, `gte`, `range`
`memberships.transaction_date`	Membership operation date	`eql`, `not_eql`, `lte`, `gte`, `range`
`memberships.period`	Active year — e.g. `"2024"` means active that calendar year	`eql`, `not_eql`, `lte`, `gte`, `range`
`memberships.multiple_in_period`	Had more than one membership in a given year	`eql` (value = year string e.g. `"2024"`)
`memberships.membership_price_id`	Membership type/tier ID	`eql`, `not_eql`

Email engagement fields

These match contacts who have at least one email record where that field is set. A contact with no email history will not match ext or not_ext.

Attribute	Meaning	Operators
`emails.created_at`	Email record date	`ext`, `not_ext`, `lte`, `gte`, `range`
`emails.type`	Email type	`ext`, `not_ext`, `eql`, `not_eql`
`emails.sender`	Sender address	`ext`, `not_ext`, `eql`, `not_eql`
`emails.subject`	Email subject line	`ext`, `not_ext`, `contains`, `not_contains`, `start_with`, `not_start_with`
`emails.user_id`	ID of Qomon user who sent the campaign	`ext`, `not_ext`, `eql`, `not_eql`
`emails.campaign_id`	Campaign ID	`ext`, `not_ext`, `eql`, `not_eql`
`emails.campaign_name`	Campaign name	`ext`, `not_ext`, `contains`, `not_contains`, `start_with`, `not_start_with`
`emails.campaign_goal`	Campaign goal	`ext`, `not_ext`, `eql`, `not_eql`
`emails.campaign_is_successful`	Campaign marked successful	`ext`, `not_ext`, `eql`, `not_eql`
`emails.campaign_performance_rating`	Campaign performance score (0–100)	`ext`, `not_ext`, `lte`, `gte`, `range`
`emails.template_id`	Template ID	`ext`, `not_ext`, `eql`, `not_eql`
`emails.template_name`	Template name	`ext`, `not_ext`, `contains`, `not_contains`, `start_with`, `not_start_with`
`emails.delivered_at`	Email delivered date	`ext`, `not_ext`, `lte`, `gte`, `range`
`emails.opened_at`	Email opened date	`ext`, `not_ext`, `lte`, `gte`, `range`
`emails.clicked_at`	Email clicked date	`ext`, `not_ext`, `lte`, `gte`, `range`
`emails.bounced_at`	Email bounced date	`ext`, `not_ext`, `lte`, `gte`, `range`
`emails.unsubscribed_at`	Unsubscribed date	`ext`, `not_ext`, `lte`, `gte`, `range`
`emails.blacklisted_at`	Blacklisted date	`ext`, `not_ext`, `lte`, `gte`, `range`
`emails.abuse_report_at`	Abuse report date	`ext`, `not_ext`, `lte`, `gte`, `range`
`emails.clicked_urls`	A URL that was clicked	`ext`, `not_ext`, `eql`, `not_eql`, `contains`, `start_with`

Sanctions fields

sanctions.validity is a computed field — it does not store a date, it tells you whether a sanction is currently active: "ongoing" (started and not yet ended) or "ended" (end date is in the past).

Attribute	Meaning	Operators
`sanctions.created_at`	Sanction creation date	`eql`, `not_eql`, `lte`, `gte`, `range`
`sanctions.start_date`	Sanction start date	`eql`, `not_eql`, `lte`, `gte`, `range`
`sanctions.end_date`	Sanction end date	`eql`, `not_eql`, `ext`, `not_ext`, `lte`, `gte`, `range`
`sanctions.status`	Sanction status	`eql`, `not_eql`, `contains`, `not_contains`
`sanctions.validity`	`"ongoing"` or `"ended"`	`eql`

Custom fields and form answers

These attributes use a different condition shape — you must also provide form_id and form_ref_ids:

Attribute	What it searches	Operators
`custom_fields`	Custom fields attached to contacts	`ext`, `not_ext`, `eql`, `not_eql`, `contains`, `not_contains`, `lte`, `gte`, `range`
`form`	Survey, consent, level of support, presence, or task form answers	`ext`, `not_ext`, `eql`, `not_eql`, `contains`, `not_contains`, `lte`, `gte`, `range`

{
  "$condition": {
    "attr": "custom_fields",
    "ope": "eql",
    "form_id": 1001,
    "form_ref_ids": [2001]
  }
}

Retrieve your form_id values from GET /v1/forms/type/{type} and form_ref_ids from GET /forms/{id}.

ext / not_ext only check whether the contact has filled in the given form_id — form_ref_ids is ignored. eql without a value checks that all listed form_ref_ids are present. eql with a value additionally checks that value matches the stored answer.

​How queries are structured

​Operators

​Pagination and sorting

​Getting a count without results

​Examples

​Attribute reference

​Contact fields

​Address fields

​Financial fields

​Email engagement fields

​Sanctions fields

​Custom fields and form answers

How queries are structured

Operators

Pagination and sorting

Getting a count without results

Examples

Attribute reference

Contact fields

Address fields

Financial fields

Email engagement fields

Sanctions fields

Custom fields and form answers