If you're still creating short links by hand — pasting URLs into a dashboard one at a time — you're doing it wrong. Once your team manages more than a dozen links per week, manual creation becomes a bottleneck. Marketing campaigns, product launches, email personalization, and affiliate tracking all demand programmatic link creation.

A URL shortener API lets you automate the entire process. Create links, assign custom slugs, set routing rules, and pull analytics data — all from your existing codebase. No browser tabs, no copy-pasting, no human error.

This guide covers the top link shortener APIs available in 2026, walks you through getting started with the v5.ink API, and provides ready-to-use code examples in cURL, Node.js, and Python.

Why you need a URL shortener API

Manual link creation breaks down fast. Here are the common scenarios where an API becomes essential:

E-commerce: Generate a unique tracking link for every product in your catalog — automatically, every time inventory updates.
Email marketing: Create personalized short links for each recipient in a 50,000-person email blast.
SaaS platforms: Auto-generate invite links, referral links, or onboarding links when users sign up.
Content distribution: Shorten every link in your RSS feed or social media queue programmatically.

If any of these sound familiar, you need an API — not a dashboard.

URL shortener API comparison (2026)

Here's how the major link shortener APIs stack up:

Bitly API

Bitly is the most well-known URL shortener. Their API offers link creation, custom domains, and basic analytics. However, the free tier is limited to 10 links per month and 1,000 API calls. Paid plans start at $35/month. Rate limits can be restrictive for high-volume use cases, and AI traffic detection is not available.

Rebrandly API

Rebrandly focuses on branded links. Their API supports custom domains and link tagging. The free plan allows 25 links with limited API access. Pricing starts at $13/month. The API is well-documented but lacks advanced traffic classification features.

Short.io API

Short.io offers a straightforward REST API with custom domain support and click tracking. Free plan includes 1,000 links. Paid plans start at $19/month. Good developer experience, but no AI agent detection or intelligent routing.

v5.ink API

v5.ink is built for the AI era. The API provides standard REST endpoints for link creation and management, plus features the others don't offer:

AI agent detection — automatically classifies traffic as Human, AI Agent, or Bot
AI-aware routing — send AI agents and humans to different destinations using the same link
AI Traffic Score — see what percentage of your link traffic comes from AI agents like ChatGPT, Perplexity, and Claude
MCP Server — let AI assistants create and manage links directly

Free plan includes 25 links and 10,000 clicks/month. Pro plan starts at $19/month with unlimited links.

Getting started with the v5.ink API

Step 1: Get your API token

Sign up at app.v5.ink/sign-up
Go to Settings → API Keys
Click "Create API Key" and copy your token

Keep this token secure. You'll pass it as a Bearer token in the Authorization header of every request.

Step 2: Create a short link

The simplest API call — shorten a URL:

curl -X POST https://api.v5.ink/api/v1/links \
  -H "Authorization: Bearer YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"url": "https://example.com"}'

Response:

{
  "id": "clk_abc123",
  "shortUrl": "https://v5.ink/x7kQ",
  "url": "https://example.com",
  "clicks": 0,
  "createdAt": "2026-03-28T00:00:00Z"
}

Step 3: Use a custom slug

Want a readable link like v5.ink/spring-sale? Pass a slug parameter:

curl -X POST https://api.v5.ink/api/v1/links \
  -H "Authorization: Bearer YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"url": "https://example.com/sale", "slug": "spring-sale"}'

Step 4: Add AI/Human routing rules

This is where v5.ink gets interesting. You can route AI agents and humans to different pages using the same short link:

curl -X POST https://api.v5.ink/api/v1/links \
  -H "Authorization: Bearer YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "url": "https://example.com/landing-page",
    "slug": "product",
    "routingRules": [
      {
        "type": "visitor-type",
        "value": "ai-agent",
        "targetUrl": "https://example.com/ai-optimized"
      }
    ]
  }'

When a human clicks v5.ink/product, they see your landing page. When ChatGPT or Perplexity follows the same link, they get a structured, AI-friendly version of the page.

Step 5: Retrieve analytics

Pull click data and AI traffic breakdowns for any link:

curl https://api.v5.ink/api/v1/analytics?linkId=clk_abc123&period=30d \
  -H "Authorization: Bearer YOUR_TOKEN"

Response includes total clicks, AI vs human breakdown, top AI agents, geographic data, and referrer information.

Code examples

Node.js

const V5INK_TOKEN = process.env.V5INK_API_TOKEN;

async function createShortLink(url, slug) {
  const response = await fetch('https://api.v5.ink/api/v1/links', {
    method: 'POST',
    headers: {
      'Authorization': `Bearer ${V5INK_TOKEN}`,
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({ url, slug })
  });

  if (!response.ok) {
    throw new Error(`API error: ${response.status}`);
  }

  return response.json();
}

// Create a link
const link = await createShortLink('https://example.com', 'my-link');
console.log(link.shortUrl); // https://v5.ink/my-link

Python

import requests
import os

V5INK_TOKEN = os.environ['V5INK_API_TOKEN']

def create_short_link(url, slug=None):
    payload = {'url': url}
    if slug:
        payload['slug'] = slug

    resp = requests.post(
        'https://api.v5.ink/api/v1/links',
        headers={'Authorization': f'Bearer {V5INK_TOKEN}'},
        json=payload
    )
    resp.raise_for_status()
    return resp.json()

# Create a link
link = create_short_link('https://example.com', slug='my-link')
print(link['shortUrl'])  # https://v5.ink/my-link

Batch creation

Need to create hundreds of links at once? Loop through your URLs:

import csv

with open('products.csv') as f:
    reader = csv.DictReader(f)
    for row in reader:
        link = create_short_link(
            url=row['product_url'],
            slug=f"product-{row['sku']}"
        )
        print(f"{row['sku']} → {link['shortUrl']}")

MCP Server: AI agent integration

v5.ink ships with a built-in MCP (Model Context Protocol) Server. MCP is an open standard that lets AI assistants like Claude, Cursor, and other AI tools interact with external services directly.

With the v5.ink MCP Server, your AI assistant can create short links, look up analytics, and manage routing rules — all through natural language.

Setup

Add this to your Claude Desktop or Cursor MCP configuration:

{
  "mcpServers": {
    "v5ink": {
      "command": "npx",
      "args": ["@v5ink/mcp-server"],
      "env": { "V5INK_API_TOKEN": "your-api-key" }
    }
  }
}

Once connected, you can say things like:

"Create a short link for https://example.com/new-feature"
"Show me the AI traffic breakdown for my top links"
"Set up a link that routes AI agents to my structured data page"

The MCP Server handles the API calls behind the scenes. It's the fastest way to manage links if you're already working in an AI-powered development environment.

Use cases

E-commerce: auto-generate tracking links

Every time a product is added to your catalog, create a short link with a predictable slug. Include UTM parameters for attribution. Track which products get AI agent traffic — a strong signal that AI assistants are recommending your products to shoppers.

Marketing: personalized email links

Generate unique short links for each email recipient. Track individual click-through rates and see which recipients' links get picked up by AI agents (a sign that your email content is being shared or indexed).

SaaS: automated invite and referral links

When a user signs up, auto-create their referral link via the API. When they share it, you get full analytics — including whether AI agents are distributing the link in conversations.

Summary

A URL shortener API is table stakes for any team that manages links at scale. The real question is which API gives you the best data.

In 2026, AI agents drive a growing share of web traffic. Most link shorteners can't tell you about it. v5.ink's API gives you the standard link management features you'd expect — plus AI agent detection, AI-aware routing, and an MCP Server for AI-native workflows.

Get started in 5 minutes:

Create a free account
Generate your API token
Make your first API call

Start building with the v5.ink API →

URL Shortener API: How to Automate Link Creation in 2026