Waterfall Phone Finder API

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

  • From $0.34 per Phone Number
  • LinkedIn URL to Phone Number
  • 10,000 Phone Numbers 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 numberCountry
+46 70 123 45 67SE
+1 512 555 0142US
+33 6 12 34 56 78FR

Trusted by 38,000+ users at startups and Fortune 500 teams

AmazonAirbusUberFedexSAPSeonDatadogZendesk

Works with any tool that can send HTTP requests

  • Claude
  • Cursor
  • Codex
  • 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

2

Paste your API key

Get your API key
3

Get your results

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)
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.

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

What it costs

Use Cases

What Teams Build With It

Put Waterfall Phone Finder wherever your data already flows.

Sales and SDRs

Add calls to your sequence

  1. LinkedIn URL of a lead
  2. Find the phone
  3. Call 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

  1. Candidate LinkedIn URL
  2. Find the phone
  3. Saved in your ATS

Reach shortlisted candidates by phone instead of waiting for an InMail answer.

RevOps

Complete high-value contacts

  1. Key accounts in the CRM
  2. Find the phone
  3. Number 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.

Required: API/MCP access and automation start on the Growth plan.

Recommended plan
…
Credits you'll have
…
Total this month
…
Get your API key

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'

What the API Returns

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

GET /resultsjson
{
"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). Schema version: 2026-09-12.

View API schema (JSON) (opens in a new tab)

GET
/v1/enrichments/waterfall-phone-finder
Read the schema, no key needed
POST
/v1/enrichments/tasks
Create a task
GET
/v1/enrichments/tasks/{taskId}
Poll status and progress
GET
/v1/enrichments/tasks/{taskId}/results
Read results, 1 to 100 per page
POST
/v1/enrichments/tasks/{taskId}/stop
Cancel a running task
GET
/v1/enrichments/tasks
Task 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
Settings
cacheAgeAllowed Cache AgeText

Results are cached to avoid paying multiple times for the same search. Configure the cache limit here. Default to 30 days.Allowed values: "30", "61", "183", "0"

useCustomAPIKeysCustom WaterfallBoolean

Check this setting to customize the Waterfall sequence and use your own API Keys.

customSequenceWaterfall SequenceJSON list

Define each provider and configure your API Keys.

Enabled when: useCustomAPIKeys==true

customSequence[].providerProviderText

Allowed values: "enrow", "prospeo", "findymail", "wiza", "full_enrich"

Enabled when: useCustomAPIKeys==true

customSequence[].apiKeyProvider API KeyText

When configuring your sequence, you have to provide your API Key for each provider.

Enabled when: useCustomAPIKeys==true

Inputs (data)
Inputs (data)
profileUrlrequiredLinkedIn ProfileText

Person's Profile URL should be in the format of https://linkedin.com/in/xxx . This enrichment doesn't work with Sales Navigator Profile URL format.

Outputs
Outputs
phoneNumberPhone NumberText

Phone Number found in international format (with country prefix).

phoneNumberCountryCountryText

Alpha-2 country code for the phone Number. See [Wikipedia page](https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2) for more information on ISO 3166-1 alpha-2.

finderProviderProviderText

Which Phone Finder provider returned the result.

Enabled when: useCustomAPIKeys==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
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.