Check DNC status

Overview

Check if a specific LinkedIn URL is on your team’s Do Not Contact (DNC) list. This endpoint performs a fast lookup with intelligent caching to determine if a prospect should be excluded from outreach campaigns.

Use Cases

Pre-Import Validation: Check URLs before importing prospects to avoid DNC violations
Real-time Filtering: Validate contacts in real-time before adding to campaigns
Compliance Verification: Ensure a contact isn’t on the DNC list before outreach
Integration Checks: Validate contacts from external systems against your DNC list
Automated Workflows: Build automated systems that respect DNC preferences

Key Features

Intelligent Caching: 5-minute TTL cache for ultra-fast repeated lookups
URL Normalization: Automatically normalizes LinkedIn URLs for accurate matching
Rate Limited: 60 requests per minute for optimal performance
Team Isolation: Only checks against your team’s DNC entries
Detailed Response: Returns full entry details if URL is found on list

Testing Example

curl -X GET "https://api.kakiyo.com/v1/dnc/check?url=https://linkedin.com/in/johnsmith" \
  -H "Authorization: Bearer YOUR_API_KEY"

// JavaScript/Node.js
const checkDNCStatus = async (linkedinUrl) => {
  const response = await fetch(
    `https://api.kakiyo.com/v1/dnc/check?url=${encodeURIComponent(linkedinUrl)}`,
    {
      method: 'GET',
      headers: {
        'Authorization': 'Bearer YOUR_API_KEY'
      }
    }
  );

  return await response.json();
};

// Usage example
const status = await checkDNCStatus('https://linkedin.com/in/johnsmith');

if (status.data.onList) {
  console.log('⚠️ Contact is on DNC list');
  console.log('Entry:', status.data.entry);
} else {
  console.log('✅ Contact is NOT on DNC list');
}

# Python
import requests
from urllib.parse import quote

def check_dnc_status(linkedin_url):
    """Check if a LinkedIn URL is on the DNC list"""
    encoded_url = quote(linkedin_url, safe='')
    response = requests.get(
        f'https://api.kakiyo.com/v1/dnc/check?url={encoded_url}',
        headers={
            'Authorization': 'Bearer YOUR_API_KEY'
        }
    )

    return response.json()

# Usage example
result = check_dnc_status('https://linkedin.com/in/johnsmith')

if result['data']['onList']:
    print('⚠️ Contact is on DNC list')
    print('Entry:', result['data']['entry'])
else:
    print('✅ Contact is NOT on DNC list')

Query Parameters

Parameter	Type	Required	Description
`url`	`string`	Yes	LinkedIn profile URL to check (will be URL-encoded)

URL Format

The endpoint accepts various LinkedIn URL formats:

https://linkedin.com/in/username
https://www.linkedin.com/in/username/
linkedin.com/in/username
in/username

All formats are automatically normalized to: https://linkedin.com/in/username

Response Format

Success Response (200 OK)

URL Found on DNC List

{
  "error": null,
  "data": {
    "onList": true,
    "entry": {
      "$id": "dnc_12345abcde",
      "teamId": "team_67890fghij",
      "url": "https://linkedin.com/in/johnsmith",
      "$createdAt": "2025-11-18T10:30:00.000Z",
      "$updatedAt": "2025-11-18T10:30:00.000Z"
    }
  }
}

URL NOT Found on DNC List

{
  "error": null,
  "data": {
    "onList": false,
    "entry": null
  }
}

Error Responses

400 Bad Request - Missing URL

{
  "error": "invalid_request",
  "message": "LinkedIn URL is required"
}

429 Too Many Requests - Rate Limit Exceeded

{
  "error": "rate_limit_exceeded",
  "message": "Too many requests. Please try again later.",
  "resetTime": 1700308800000
}

401 Unauthorized - Invalid API Key

{
  "error": "unauthorized",
  "message": "Invalid or missing API key"
}

500 Internal Server Error

{
  "error": "internal_error",
  "message": "An internal error occurred"
}

Caching Mechanism

The DNC check endpoint uses intelligent caching to optimize performance:

Cache Details

TTL: 5 minutes (300 seconds)
Scope: Team-level isolation
Key: Based on normalized LinkedIn URL
Invalidation: Automatic on DNC list modifications

Cache Benefits

Fast Lookups: Cached responses returned in < 10ms
Reduced Load: Minimizes database queries for repeated checks
Cost Savings: Fewer database operations
Better UX: Near-instant responses for cached URLs

Cache Behavior

// First check - hits database (slower)
const check1 = await checkDNCStatus('linkedin.com/in/john');
// Response time: ~100ms

// Second check within 5 minutes - hits cache (faster)
const check2 = await checkDNCStatus('linkedin.com/in/john');
// Response time: ~10ms

// After 5 minutes - hits database again
// OR if URL is added/removed from DNC list - cache invalidated

URL Normalization

All LinkedIn URLs are automatically normalized before checking:

Normalization Rules

Input	Normalized Output
`https://www.linkedin.com/in/john/`	`https://linkedin.com/in/john`
`linkedin.com/in/john`	`https://linkedin.com/in/john`
`in/john`	`https://linkedin.com/in/john`
`LINKEDIN.COM/IN/JOHN`	`https://linkedin.com/in/john`

This ensures consistent matching regardless of URL format.

Rate Limiting

Limit: 60 requests per minute per team
Window: Rolling 60-second window
Shared Limit: Shared with other DNC read operations
Exceeded: Returns 429 status with resetTime timestamp

Integration Examples

Pre-Import Validation

const validateProspectsBeforeImport = async (prospects) => {
  const validationResults = [];

  for (const prospect of prospects) {
    const dncStatus = await checkDNCStatus(prospect.linkedinUrl);

    validationResults.push({
      name: prospect.name,
      url: prospect.linkedinUrl,
      onDNC: dncStatus.data.onList,
      canImport: !dncStatus.data.onList
    });

    // Rate limit protection
    await new Promise(resolve => setTimeout(resolve, 1000));
  }

  return validationResults;
};

// Usage
const prospects = [
  { name: 'John Smith', linkedinUrl: 'linkedin.com/in/john' },
  { name: 'Jane Doe', linkedinUrl: 'linkedin.com/in/jane' }
];

const validation = await validateProspectsBeforeImport(prospects);
const canImport = validation.filter(v => v.canImport);

console.log(`${canImport.length} of ${prospects.length} can be imported`);

Real-time Campaign Filtering

const filterCampaignProspects = async (campaignProspects) => {
  const filtered = [];

  for (const prospect of campaignProspects) {
    const status = await checkDNCStatus(prospect.linkedinUrl);

    if (!status.data.onList) {
      filtered.push(prospect);
    } else {
      console.log(`Skipping ${prospect.name} - on DNC list`);
    }
  }

  return filtered;
};

Batch Validation with Caching

const batchCheckDNC = async (urls) => {
  // Group URLs to check
  const results = [];

  // Process in batches to respect rate limits
  const batchSize = 50; // 50 per minute to stay under 60/min limit

  for (let i = 0; i < urls.length; i += batchSize) {
    const batch = urls.slice(i, i + batchSize);

    const batchResults = await Promise.all(
      batch.map(async (url) => {
        const status = await checkDNCStatus(url);
        return {
          url,
          onDNC: status.data.onList,
          entry: status.data.entry
        };
      })
    );

    results.push(...batchResults);

    // Wait before next batch if needed
    if (i + batchSize < urls.length) {
      await new Promise(resolve => setTimeout(resolve, 60000));
    }
  }

  return results;
};

Integration with CRM

const validateCRMContact = async (contact) => {
  if (!contact.linkedinUrl) {
    return { valid: false, reason: 'No LinkedIn URL' };
  }

  const dncStatus = await checkDNCStatus(contact.linkedinUrl);

  if (dncStatus.data.onList) {
    return {
      valid: false,
      reason: 'On DNC list',
      dncEntry: dncStatus.data.entry
    };
  }

  return { valid: true };
};

// Usage
const contact = {
  name: 'John Smith',
  linkedinUrl: 'linkedin.com/in/john'
};

const validation = await validateCRMContact(contact);

if (validation.valid) {
  await crmClient.addToCampaign(contact);
} else {
  console.log(`Cannot add ${contact.name}: ${validation.reason}`);
}

Automated Compliance Check

const runComplianceCheck = async (prospectList) => {
  const report = {
    total: prospectList.length,
    onDNC: 0,
    safe: 0,
    violations: []
  };

  for (const prospect of prospectList) {
    const status = await checkDNCStatus(prospect.linkedinUrl);

    if (status.data.onList) {
      report.onDNC++;
      report.violations.push({
        name: prospect.name,
        url: prospect.linkedinUrl,
        addedToDNC: status.data.entry.$createdAt
      });
    } else {
      report.safe++;
    }
  }

  return report;
};

Best Practices

Always Check Before Adding: Validate URLs before adding to campaigns
Handle Rate Limits: Implement exponential backoff for 429 responses
Batch with Delays: Add delays between batch checks to respect rate limits
URL Encoding: Always URL-encode the LinkedIn URL parameter
Cache Awareness: Understand that results are cached for 5 minutes
Error Handling: Always check for error field in response
Automated Integration: Integrate checks into your import workflows

Performance Considerations

Cached Response: < 10ms for cached entries
Database Query: ~100ms for non-cached entries
URL Normalization: Automatic and fast
Team Isolation: Permissions enforced at database level
Composite Index: Optimized queries with teamId + url index

Response Fields

Field	Type	Description
`error`	`string\|null`	Error code if request failed, `null` on success
`data.onList`	`boolean`	`true` if URL is on DNC list, `false` otherwise
`data.entry`	`object\|null`	Full DNC entry details if found, `null` if not on list

Common Use Cases

Pre-Campaign Validation

const validateCampaignProspects = async (campaignId) => {
  const prospects = await getProspectsForCampaign(campaignId);

  const validation = await Promise.all(
    prospects.map(async (p) => {
      const status = await checkDNCStatus(p.linkedinUrl);
      return {
        prospectId: p.id,
        name: p.name,
        blocked: status.data.onList
      };
    })
  );

  const blocked = validation.filter(v => v.blocked);

  if (blocked.length > 0) {
    console.log(`⚠️ ${blocked.length} prospects are on DNC list`);
    return { canLaunch: false, blocked };
  }

  return { canLaunch: true, blocked: [] };
};

Import Wizard Integration

const importWizardStep = async (csvData) => {
  const validation = {
    valid: [],
    invalid: [],
    onDNC: []
  };

  for (const row of csvData) {
    if (!row.linkedinUrl) {
      validation.invalid.push({ ...row, reason: 'Missing URL' });
      continue;
    }

    const dncStatus = await checkDNCStatus(row.linkedinUrl);

    if (dncStatus.data.onList) {
      validation.onDNC.push({
        ...row,
        dncEntry: dncStatus.data.entry
      });
    } else {
      validation.valid.push(row);
    }
  }

  return validation;
};

Next Steps

After checking DNC status:

Add to DNC: If not on list, use Add Single endpoint
Import Prospects: Proceed with import if URL is not on DNC list
View All Entries: Use List DNC endpoint
Remove Entry: Use Delete DNC endpoint if needed

List DNC Entries - View all DNC entries
Add Single Entry - Add a URL to DNC list
Bulk Add Entries - Add multiple URLs to DNC list
Delete Entry - Remove a URL from DNC list

Authorizations

Authorization

string

header

required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Query Parameters

url

string

required

LinkedIn profile URL to check

Example:

"https://linkedin.com/in/johnsmith"

Response

DNC check result

error

null

data

object

Show child attributes

Documentation Index

​Overview

​Use Cases

​Key Features

​Testing Example

​Query Parameters

​URL Format

​Response Format

​Success Response (200 OK)

​URL Found on DNC List

​URL NOT Found on DNC List

​Error Responses

​400 Bad Request - Missing URL

​429 Too Many Requests - Rate Limit Exceeded

​401 Unauthorized - Invalid API Key

​500 Internal Server Error

​Caching Mechanism

​Cache Details

​Cache Benefits

​Cache Behavior

​URL Normalization

​Normalization Rules

​Rate Limiting

​Integration Examples

​Pre-Import Validation

​Real-time Campaign Filtering

​Batch Validation with Caching

​Integration with CRM

​Automated Compliance Check

​Best Practices

​Performance Considerations

​Response Fields

​Common Use Cases

​Pre-Campaign Validation

​Import Wizard Integration

​Next Steps

​Related Endpoints

Authorizations

Query Parameters

Response

Overview

Use Cases

Key Features

Testing Example

Query Parameters

URL Format

Response Format

Success Response (200 OK)

URL Found on DNC List

URL NOT Found on DNC List

Error Responses

400 Bad Request - Missing URL

429 Too Many Requests - Rate Limit Exceeded

401 Unauthorized - Invalid API Key

500 Internal Server Error

Caching Mechanism

Cache Details

Cache Benefits

Cache Behavior

URL Normalization

Normalization Rules

Rate Limiting

Integration Examples

Pre-Import Validation

Real-time Campaign Filtering

Batch Validation with Caching

Integration with CRM

Automated Compliance Check

Best Practices

Performance Considerations

Response Fields

Common Use Cases

Pre-Campaign Validation

Import Wizard Integration

Next Steps

Related Endpoints