Waterfall Phone Finder API

Find phone numbers from LinkedIn profile URLs, from your AI assistant, no-code workflow or own code.

Get your API key API docs
$0.50 per Number Found
LinkedIn URL to Phone Number
10,000 Profiles per Task
Your list
LinkedIn profile URL
linkedin.com/in/maya-lindqvist
linkedin.com/in/tom-okafor
linkedin.com/in/lea-moreau
What you get back
Phone number
Country
+46 70 123 45 67
SE
+1 512 555 0142
US
+33 6 12 34 56 78
FR
Trusted by 38,000+ users at startups and Fortune 500 teams
Amazon Airbus Uber FedEx SAP
Datadog
Zendesk
Works with any tool that can send HTTP requests
Claude ChatGPT Cursor Make n8n Zapier Your own code
Get Started

Pick Your Way In

Let an AI assistant or your automation tool do the setup, or call the REST API from your own code.

1

Paste the setup prompt

Copy the prompt for Claude, ChatGPT or Cursor, or for Make, n8n or Zapier, and paste it in. The AI creates a Datablist folder on your computer and sets everything up.

2

Paste your API key

When the AI asks, copy your API key from the Datablist app and paste it into the .env file it opened. Never paste it into the chat.

Get your API key
3

Get your results

Send your list of LinkedIn profile URLs and get one row back per profile: the phone number in international format and its country, ready for your dialer or CRM.

See a sample result
Using Make, n8n or Zapier? Here is every field for the HTTP request

Use the HTTP request module or node your tool offers. You need three steps: send the list, wait, then read the results.

1. Send your list (HTTP request)

Method
POST
URL
https://api.datablist.com/v1/enrichments/tasks
Headers
X-API-Key = your API key
Content-Type = application/json
Body (JSON)
{
  "enrichmentId": "waterfall-phone-finder",
  "uniqueId": "waterfall-phone-finder-import-1",
  "settings": {
    "cacheAge": "30"
  },
  "inputs": [
    {"inputId": "row-1", "data": {"profileUrl": "https://www.linkedin.com/in/maya-lindqvist/"}},
    {"inputId": "row-2", "data": {"profileUrl": "https://www.linkedin.com/in/tom-okafor/"}},
    {"inputId": "row-3", "data": {"profileUrl": "https://www.linkedin.com/in/lea-moreau/"}}
  ]
}
Keep
The @id from the response. That is your task ID.

2. Wait until it is done

Add a short wait or delay, then a GET request to https://api.datablist.com/v1/enrichments/tasks/TASK_ID with the same X-API-Key header. Repeat until status is completed.

3. Read the results

GET https://api.datablist.com/v1/enrichments/tasks/TASK_ID/results?limit=50. Map outputs to your columns. If nextCursor is not empty, call again with &cursor= plus that value.

Create a task with one request. The full script with polling and results is in the developer section.

Create a task
curl --request POST 'https://api.datablist.com/v1/enrichments/tasks' \
  --header 'X-API-Key: YOUR_PERSONAL_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
    "enrichmentId": "waterfall-phone-finder",
    "uniqueId": "waterfall-phone-finder-import-1",
    "settings": {
      "cacheAge": "30"
    },
    "inputs": [
      {"inputId": "row-1", "data": {"profileUrl": "https://www.linkedin.com/in/maya-lindqvist/"}},
      {"inputId": "row-2", "data": {"profileUrl": "https://www.linkedin.com/in/tom-okafor/"}},
      {"inputId": "row-3", "data": {"profileUrl": "https://www.linkedin.com/in/lea-moreau/"}}
    ]
  }'
import requests

response = requests.post(
    "https://api.datablist.com/v1/enrichments/tasks",
    headers={"X-API-Key": "YOUR_PERSONAL_API_KEY"},
    json={
      "enrichmentId": "waterfall-phone-finder",
      "uniqueId": "waterfall-phone-finder-import-1",
      "settings": {
        "cacheAge": "30"
      },
      "inputs": [
        {"inputId": "row-1", "data": {"profileUrl": "https://www.linkedin.com/in/maya-lindqvist/"}},
        {"inputId": "row-2", "data": {"profileUrl": "https://www.linkedin.com/in/tom-okafor/"}},
        {"inputId": "row-3", "data": {"profileUrl": "https://www.linkedin.com/in/lea-moreau/"}}
      ]
    },
)
task = response.json()
print(task["@id"], task["status"])
const response = await fetch("https://api.datablist.com/v1/enrichments/tasks", {
  method: "POST",
  headers: {
    "X-API-Key": "YOUR_PERSONAL_API_KEY",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "enrichmentId": "waterfall-phone-finder",
    "uniqueId": "waterfall-phone-finder-import-1",
    "settings": {
      "cacheAge": "30"
    },
    "inputs": [
      {"inputId": "row-1", "data": {"profileUrl": "https://www.linkedin.com/in/maya-lindqvist/"}},
      {"inputId": "row-2", "data": {"profileUrl": "https://www.linkedin.com/in/tom-okafor/"}},
      {"inputId": "row-3", "data": {"profileUrl": "https://www.linkedin.com/in/lea-moreau/"}}
    ]
  }),
});
const task = await response.json();
console.log(task["@id"], task.status);
Overview

At a Glance

One call tries several phone finders in a row until one returns a number, and you only pay for the numbers found. No Datablist workspace, collection or import needed.

What you give it
  • LinkedIn profile URLs: Public profile links. Sales Navigator links are not supported
  • How fresh (optional): Accept cached results up to 30, 61 or 183 days old, or none
  • Your own finder keys (optional): Run the waterfall on your own provider accounts
What it costs
  • 500 credits per number found: Searches without a result are free
  • Cached results: Accepted cached results are not charged
  • 1,000 credits = $1: Shared with the Datablist app
Use Cases

What Teams Build With It

Put Waterfall Phone Finder wherever your data already flows.

Sales and SDRs
Add calls to your sequence
LinkedIn URL of a leadFind the phoneCall step in your dialer
Get a direct number for your best leads and add a call step in Aircall, Ringover or your sales engagement tool.
Recruiting
Call candidates directly
Candidate LinkedIn URLFind the phoneSaved in your ATS
Reach shortlisted candidates by phone instead of waiting for an InMail answer.
RevOps
Complete high-value contacts
Key accounts in the CRMFind the phoneNumber on the contact
Run the lookup only for decision makers on your target accounts, so you spend credits where a call matters.
Pricing

What Will It Cost You?

Pay per lookup with credits. API access starts on the Growth plan.

Calculator

How much will it cost you?

Tell us how many LinkedIn profiles you need phone numbers for and we'll show you the cheapest way to get them.

= 500,000 credits
Recommended planGrowth: $50/mo
Credit top-up-
Credits you'll have20,000
Total this month $50
Same credits as the Datablist app • View pricing
How credits work
1,000 credits = $1, so each credit costs a tenth of a cent. A phone number found costs 500 credits, or $0.50. Searches without a result and accepted cached results are not charged, so the estimate above is the maximum. Using your own finder keys can change the Datablist usage. Plan credits renew monthly and reset if unused. Top-up credits never expire.
For Developers

Build It Into Your Code

Everything you need to call the REST API directly: code, responses, endpoints, fields, authentication and limits.

Copy, Paste, Run

A complete script that creates a task, waits for it and prints every result. Replace YOUR_PERSONAL_API_KEY with your key.

# 1. Create the task (returns 202 Accepted and the task "@id")
curl --request POST 'https://api.datablist.com/v1/enrichments/tasks' \
  --header 'X-API-Key: YOUR_PERSONAL_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
    "enrichmentId": "waterfall-phone-finder",
    "uniqueId": "waterfall-phone-finder-import-1",
    "settings": {
      "cacheAge": "30"
    },
    "inputs": [
      {"inputId": "row-1", "data": {"profileUrl": "https://www.linkedin.com/in/maya-lindqvist/"}},
      {"inputId": "row-2", "data": {"profileUrl": "https://www.linkedin.com/in/tom-okafor/"}},
      {"inputId": "row-3", "data": {"profileUrl": "https://www.linkedin.com/in/lea-moreau/"}}
    ]
  }'

# 2. Poll every few seconds until status is completed, failed or stopped
curl 'https://api.datablist.com/v1/enrichments/tasks/TASK_ID' \
  --header 'X-API-Key: YOUR_PERSONAL_API_KEY'

# 3. Read the results, then follow nextCursor until it is null
curl 'https://api.datablist.com/v1/enrichments/tasks/TASK_ID/results?limit=50' \
  --header 'X-API-Key: YOUR_PERSONAL_API_KEY'
import time
import requests

BASE = "https://api.datablist.com/v1/enrichments"
HEADERS = {"X-API-Key": "YOUR_PERSONAL_API_KEY"}

# 1. Create the task
response = requests.post(f"{BASE}/tasks", headers=HEADERS, json={
  "enrichmentId": "waterfall-phone-finder",
  "uniqueId": "waterfall-phone-finder-import-1",
  "settings": {
    "cacheAge": "30"
  },
  "inputs": [
    {"inputId": "row-1", "data": {"profileUrl": "https://www.linkedin.com/in/maya-lindqvist/"}},
    {"inputId": "row-2", "data": {"profileUrl": "https://www.linkedin.com/in/tom-okafor/"}},
    {"inputId": "row-3", "data": {"profileUrl": "https://www.linkedin.com/in/lea-moreau/"}}
  ]
})
response.raise_for_status()
task_id = response.json()["@id"]

# 2. Poll until the task finishes
while True:
    task = requests.get(f"{BASE}/tasks/{task_id}", headers=HEADERS).json()
    if task["status"] in ("completed", "failed", "stopped"):
        break
    time.sleep(5)

# 3. Read every result page
params = {"limit": 50}
while True:
    page = requests.get(f"{BASE}/tasks/{task_id}/results", headers=HEADERS, params=params).json()
    for result in page["results"]:
        print(result["inputId"], result["status"], result["outputs"])
    if not page["nextCursor"]:
        break
    params["cursor"] = page["nextCursor"]
// Node.js 18+ or any runtime with fetch. Keep your key on the server.
const BASE = "https://api.datablist.com/v1/enrichments";
const HEADERS = { "X-API-Key": "YOUR_PERSONAL_API_KEY" };
const sleep = (ms) => new Promise((r) => setTimeout(r, ms));

// 1. Create the task
const created = await fetch(`${BASE}/tasks`, {
  method: "POST",
  headers: { ...HEADERS, "Content-Type": "application/json" },
  body: JSON.stringify({
    "enrichmentId": "waterfall-phone-finder",
    "uniqueId": "waterfall-phone-finder-import-1",
    "settings": {
      "cacheAge": "30"
    },
    "inputs": [
      {"inputId": "row-1", "data": {"profileUrl": "https://www.linkedin.com/in/maya-lindqvist/"}},
      {"inputId": "row-2", "data": {"profileUrl": "https://www.linkedin.com/in/tom-okafor/"}},
      {"inputId": "row-3", "data": {"profileUrl": "https://www.linkedin.com/in/lea-moreau/"}}
    ]
  }),
});
if (!created.ok) throw new Error(`Create failed: ${created.status}`);
const taskId = (await created.json())["@id"];

// 2. Poll until the task finishes
let task;
do {
  await sleep(5000);
  task = await (await fetch(`${BASE}/tasks/${taskId}`, { headers: HEADERS })).json();
} while (!["completed", "failed", "stopped"].includes(task.status));

// 3. Read every result page
let cursor = null;
do {
  const url = new URL(`${BASE}/tasks/${taskId}/results`);
  url.searchParams.set("limit", "50");
  if (cursor) url.searchParams.set("cursor", cursor);
  const page = await (await fetch(url, { headers: HEADERS })).json();
  for (const result of page.results) {
    console.log(result.inputId, result.status, result.outputs);
  }
  cursor = page.nextCursor;
} while (cursor);

What the API Returns

One result per input, with your inputId, a status, the outputs and the credits used. Sample data.

{
  "taskId": "00000000000040008000000000000001",
  "results": [
    {
      "inputId": "row-1",
      "status": "success",
      "outputs": {
        "phoneNumber": "+46701234567",
        "phoneNumberCountry": "SE"
      },
      "creditsUsed": "500",
      "error": null
    }
  ],
  "nextCursor": null
}

Endpoints and Fields

All paths are relative to https://api.datablist.com. Field definitions come from GET /v1/enrichments/waterfall-phone-finder (docs updated Oct 15, 2026).

GET/v1/enrichments/waterfall-phone-finderRead the schema, no key needed
POST/v1/enrichments/tasksCreate a task
GET/v1/enrichments/tasks/{taskId}Poll status and progress
GET/v1/enrichments/tasks/{taskId}/resultsRead results, 1 to 100 per page
POST/v1/enrichments/tasks/{taskId}/stopCancel a running task
GET/v1/enrichments/tasksTask history, newest first
Schema Reference
Send settings once per task and one data object per input. Results can include extra fields as the enrichment evolves, so keep unknown keys when you parse outputs.
Show all settings, inputs and outputs
Settings
cacheAgeAllowed cache age Text Maximum age in days of a cached result you accept. One of: "30" (default), "61", "183", "0".
useCustomAPIKeysUse your own API keys Boolean Run a custom lookup sequence with your own provider keys.
customSequenceCustom sequence List Providers to try in order, each with provider and apiKey. Providers: enrow, prospeo, findymail, wiza, full_enrich. Applies when useCustomAPIKeys is true.
Inputs (data)
profileUrlrequiredLinkedIn Profile Text Public LinkedIn profile URL, such as https://www.linkedin.com/in/example/. Sales Navigator URLs are not supported.
Outputs
phoneNumberrequiredPhone Number Text Phone number found, in international format with the country prefix.
phoneNumberCountryPhone Country Text ISO 3166-1 alpha-2 country code of the number.
finderProviderFinder Provider Text Which provider returned the result. Applies when useCustomAPIKeys is true.

One Header, Clear Limits

Create a Personal API Key in your Datablist account and send it on every authenticated request.

Authentication

Send your key in the X-API-Key header. Datablist exchanges and renews access tokens for you.

  • Header: X-API-Key: YOUR_PERSONAL_API_KEY
  • Optional: manage tokens yourself with Authorization: Bearer from POST /v1/account/token
  • One or the other: sending both headers returns 400 AmbiguousCredentials
  • Server side only: keep keys out of URLs, browser code and logs

Limits

  • Inputs per task: 1 to 10,000
  • Size: 16 KiB per input, 10 MiB per request
  • Run time: up to 24 hours per task
  • Task creation: 10 requests per 60 seconds per account
  • Polling and results: 120 requests per 60 seconds per operation
  • Active tasks: about 20 at once per account
  • Retention: tasks and results are kept for 90 days

Prefer No Code at All?
Run Waterfall Phone Finder in the App

Upload a CSV or Excel file, pick a column and run the same enrichment in a few clicks. 38,000+ users are already on Datablist.

See the no-code version
Guides

Related Tutorials

Learn the newest workflows with detailed step-by-step guides.

FAQ

Frequently Asked Questions

Everything you or your AI coding agent need to integrate the Waterfall Phone Finder API: auth, request, polling, results, limits and retries.

Send your Personal API Key in the X-API-Key header on every request. Create the key at https://app.datablist.com/account/api; API access starts on the Growth plan. Keep it server side, for example in a DATABLIST_API_KEY environment variable or a .env file, and never put it in URLs, browser code or shared chats.
The API is asynchronous. POST /v1/enrichments/tasks returns 202 Accepted with the task @id. Poll GET /v1/enrichments/tasks/{taskId} every few seconds until the status is completed, failed or stopped, then read GET /v1/enrichments/tasks/{taskId}/results.
A JSON object with enrichmentId set to "waterfall-phone-finder", your own uniqueId, a settings object sent once per task and an inputs array. Each input has an inputId and a data object, here with profileUrl. GET /v1/enrichments/waterfall-phone-finder returns the full schema of settings, inputs and outputs.
Request up to 100 results per page with the limit parameter and follow nextCursor until it is null. Each result carries your inputId, a status, the outputs, creditsUsed and an error field. Match rows by inputId and ignore output keys you do not know, since new fields can be added. Results are kept for 90 days.
1 to 10,000 inputs per task, 16 KiB per input and 10 MiB per request. Task creation allows 10 requests per 60 seconds per account, polling and results 120 requests per 60 seconds per operation, and about 20 tasks can be active at once.
Do not send the same POST again blindly, the task may already be running. Look up your uniqueId in GET /v1/enrichments/tasks first; reusing the uniqueId of an active task returns 409. POST /v1/enrichments/tasks/{taskId}/stop cancels a task you no longer need.
Yes. Click Set up with AI and paste the prompt into Claude, ChatGPT or Cursor. The prompt is one line with a link to the Datablist setup skill on GitHub, the same for every Datablist API. The assistant follows the skill, creates a Datablist folder and a .env file, asks you to paste your API key into it, then asks which enrichment to run. In Make, n8n or Zapier you add an HTTP request step with the fields listed on this page.
500 credits for each phone number found. Searches without a result and accepted cached results are not charged. Read creditsUsed on each result, and set maxCredits on the task to cap your spend.
It sets how old a cached result can be before Datablist searches again: 30 days by default, or 61, 183, or 0 to always search live.
Yes. Set useCustomAPIKeys to true and send a customSequence with each provider and its apiKey (enrow, prospeo, findymail, wiza or full_enrich). Keep those keys private. The result then also returns finderProvider.
Keep Building

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