Filtering & search

The FirstQuadrant API provides powerful filtering capabilities to help you find exactly the data you need. This guide covers search queries, advanced filters, and field selection.

Quick start

# Search contacts by name or email
curl "https://api.us.firstquadrant.ai/v5/contacts?query=john" \
  -H "Authorization: Bearer YOUR_API_KEY"

# Filter by email domain
curl "https://api.us.firstquadrant.ai/v5/[email protected]" \
  -H "Authorization: Bearer YOUR_API_KEY"

# Select specific fields
curl "https://api.us.firstquadrant.ai/v5/contacts?select[]=id&select[]=email&select[]=firstName" \
  -H "Authorization: Bearer YOUR_API_KEY"

Search with query parameter

The query parameter performs full-text search across relevant fields:

# Search contacts
GET /v5/contacts?query=john

# Search campaigns
GET /v5/campaigns?query=welcome

# Combine with other filters
GET /v5/contacts?query=john&filter.tags.has=customer

The search is case-insensitive and searches across multiple fields depending on the resource type.

Advanced filtering

Filter syntax

Filters use the format: filter.field.operator=value

# Single filter
filter.email.equals[email protected]

# Multiple filters (AND logic)
filter.firstName.equals=John&filter.lastName.contains=Doe

# Nested field filters
filter.customProperties.industry.equals=technology

Available operators

String operators

Operator	Description	Example
`equals`	Exact match (case-sensitive)	`[email protected]`
`not`	Not equal to	`filter.status.not=inactive`
`contains`	Contains substring	`[email protected]`
`startsWith`	Starts with string	`filter.name.startsWith=John`
`endsWith`	Ends with string	`filter.email.endsWith=.edu`
`in`	Value in array	`filter.status.in=active,pending`
`notIn`	Value not in array	`filter.status.notIn=deleted,archived`

Number operators

Operator	Description	Example
`equals`	Equal to	`filter.score.equals=100`
`not`	Not equal to	`filter.score.not=0`
`gt`	Greater than	`filter.score.gt=50`
`gte`	Greater than or equal	`filter.score.gte=50`
`lt`	Less than	`filter.score.lt=100`
`lte`	Less than or equal	`filter.score.lte=100`
`in`	Value in array	`filter.priority.in=1,2,3`

Date operators

Operator	Description	Example
`equals`	Exact date match	`filter.createdAt.equals=2024-01-15`
`gt`	After date	`filter.createdAt.gt=2024-01-01`
`gte`	On or after date	`filter.lastActivityAt.gte=2024-01-01`
`lt`	Before date	`filter.createdAt.lt=2024-12-31`
`lte`	On or before date	`filter.updatedAt.lte=2024-12-31`

Array operators

Operator	Description	Example
`has`	Array contains value	`filter.tags.has=customer`
`hasEvery`	Array contains all values	`filter.tags.hasEvery=customer,vip`
`hasSome`	Array contains any value	`filter.tags.hasSome=lead,prospect`
`isEmpty`	Array is empty	`filter.tags.isEmpty=true`

Boolean operators

Operator	Description	Example
`equals`	Boolean value	`filter.isActive.equals=true`
`not`	Opposite boolean	`filter.isVerified.not=true`

Filtering examples

// Advanced filtering with multiple conditions
const params = new URLSearchParams({
  "filter.status.equals": "active",
  "filter.createdAt.gte": "2024-01-01",
  "filter.tags.hasSome": "customer,lead",
  "filter.customProperties.score.gt": "50",
  query: "john",
});

const response = await fetch(`https://api.us.firstquadrant.ai/v5/contacts?${params}`, {
  headers: {
    Authorization: "Bearer YOUR_API_KEY",
    "FirstQuadrant-Organization-ID": "org_YOUR_ORG_ID",
  },
});

const contacts = await response.json();

Field selection

Use the select[] parameter to specify which fields to include in the response:

Basic field selection

# Select only id, email, and name fields
GET /v5/contacts?select[]=id&select[]=email&select[]=firstName&select[]=lastName

# Response includes only selected fields
[
  {
    "id": "con_abc123",
    "email": "[email protected]",
    "firstName": "John",
    "lastName": "Doe"
  }
]

Nested field selection

Use dot notation for nested fields:

# Select nested fields
GET /v5/contacts?select[]=id&select[]=email&select[]=company.name&select[]=customProperties.score

# Response
[
  {
    "id": "con_abc123",
    "email": "[email protected]",
    "company": {
      "name": "Acme Corp"
    },
    "customProperties": {
      "score": 85
    }
  }
]

Performance benefits

Field selection reduces payload size and improves performance:

// Fetch only essential fields for a list view
const listParams = new URLSearchParams({
  "select[]": ["id", "email", "firstName", "lastName", "company.name"],
  limit: "100",
});

// Fetch all fields for a detail view
const detailResponse = await fetch(`https://api.us.firstquadrant.ai/v5/contacts/${contactId}`);

Complex filter combinations

Example 1: Sales qualified leads

Find high-value leads from specific industries:

GET /v5/contacts?
  filter.customProperties.leadScore.gte=80&
  filter.customProperties.industry.in=technology,finance,healthcare&
  filter.tags.has=qualified&
  filter.lastActivityAt.gte=2024-01-01&
  orderBy=customProperties.leadScore&
  sort=desc

Example 2: Email campaign targets

Find contacts for an email campaign:

GET /v5/contacts?
  filter.email.endsWith=.com&
  filter.emailOptOut.equals=false&
  filter.tags.hasEvery=customer,active&
  filter.customProperties.lastPurchaseDate.gte=2023-01-01&
  select[]=id&
  select[]=email&
  select[]=firstName

Example 3: Data cleanup

Find potentially duplicate contacts:

GET /v5/contacts?
  filter.email.contains[email protected]&
  filter.createdAt.gte=2024-01-01&
  orderBy=email&
  sort=asc

Special filters

Null and empty values

# Find contacts without a company
filter.companyId.equals=null

# Find contacts with no tags
filter.tags.isEmpty=true

# Find contacts with any tags
filter.tags.isEmpty=false

Date ranges

// Contacts created this month
const startOfMonth = new Date();
startOfMonth.setDate(1);
startOfMonth.setHours(0, 0, 0, 0);

const params = new URLSearchParams({
  "filter.createdAt.gte": startOfMonth.toISOString(),
  "filter.createdAt.lt": new Date().toISOString(),
});

Pattern matching

# Email domains
filter.email.endsWith[email protected]

# Phone numbers with area code
filter.phone.startsWith=+1415

# Names containing substring
filter.firstName.contains=john

Filter limits and performance

Best practices

Use indexes: Filter on indexed fields (id, email, createdAt) for better performance
Limit results: Always use pagination with filters
Select fields: Only request fields you need
Combine wisely: Too many filters can slow queries

Performance tips

// ❌ Inefficient: Fetching all fields for large dataset
const response = await fetch("/v5/contacts?limit=100");

// ✅ Efficient: Select only needed fields with filters
const response = await fetch(
  "/v5/contacts?" + "filter.status.equals=active&" + "select[]=id&select[]=email&select[]=name&" + "limit=50",
);

Common use cases

1. Segmentation

// VIP customers in California
const vipCA = {
  "filter.tags.has": "vip",
  "filter.customProperties.state.equals": "CA",
  "filter.customProperties.lifetimeValue.gt": "10000",
};

2. Time-based queries

// Contacts inactive for 90 days
const ninetyDaysAgo = new Date();
ninetyDaysAgo.setDate(ninetyDaysAgo.getDate() - 90);

const inactive = {
  "filter.lastActivityAt.lt": ninetyDaysAgo.toISOString(),
  "filter.status.equals": "active",
};

3. Data export

// Export specific fields with filters
async function exportContacts(filters) {
  const params = new URLSearchParams({
    ...filters,
    "select[]": ["id", "email", "firstName", "lastName", "createdAt"],
    limit: "100",
  });

  // Paginate through all results
  let allContacts = [];
  let hasMore = true;
  let cursor = null;

  while (hasMore) {
    if (cursor) params.set("startingAfter", cursor);

    const response = await fetch(`/v5/contacts?${params}`);
    const page = await response.json();

    allContacts = allContacts.concat(page);
    hasMore = page.length === 100;

    if (hasMore) cursor = page[page.length - 1].id;
  }

  return allContacts;
}

Troubleshooting

Common issues

Invalid operator: Ensure the operator is valid for the field type
Field not found: Check field names and nested paths
Type mismatch: Ensure filter values match the field type
Special characters: URL-encode special characters in filter values

Debugging tips

// Log the exact URL being called
const params = new URLSearchParams(filters);
console.log(`API URL: https://api.us.firstquadrant.ai/v5/contacts?${params}`);

// Check response headers for debugging info
const response = await fetch(url);
console.log("Request ID:", response.headers.get("X-Request-Id"));

Getting started

Product manual

Playbooks

API reference

Company

Quick start

Search with query parameter

Advanced filtering

Filter syntax

Available operators

String operators

Number operators

Date operators

Array operators

Boolean operators

Filtering examples

Field selection

Basic field selection

Nested field selection

Performance benefits

Complex filter combinations

Example 1: Sales qualified leads

Example 2: Email campaign targets

Example 3: Data cleanup

Special filters

Null and empty values

Date ranges

Pattern matching

Filter limits and performance

Best practices

Performance tips

Common use cases

1. Segmentation

2. Time-based queries

3. Data export

Troubleshooting

Common issues

Debugging tips

Getting started

Product manual

Playbooks

API reference

Company

​Quick start

​Search with query parameter

​Advanced filtering

​Filter syntax

​Available operators

​String operators

​Number operators

​Date operators

​Array operators

​Boolean operators

​Filtering examples

​Field selection

​Basic field selection

​Nested field selection

​Performance benefits

​Complex filter combinations

​Example 1: Sales qualified leads

​Example 2: Email campaign targets

​Example 3: Data cleanup

​Special filters

​Null and empty values

​Date ranges

​Pattern matching

​Filter limits and performance

​Best practices

​Performance tips

​Common use cases

​1. Segmentation

​2. Time-based queries

​3. Data export

​Troubleshooting

​Common issues

​Debugging tips

Quick start

Search with query parameter

Advanced filtering

Filter syntax

Available operators

String operators

Number operators

Date operators

Array operators

Boolean operators

Filtering examples

Field selection

Basic field selection

Nested field selection

Performance benefits

Complex filter combinations

Example 1: Sales qualified leads

Example 2: Email campaign targets

Example 3: Data cleanup

Special filters

Null and empty values

Date ranges

Pattern matching

Filter limits and performance

Best practices

Performance tips

Common use cases

1. Segmentation

2. Time-based queries

3. Data export

Troubleshooting

Common issues

Debugging tips