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
| LinkedIn profile URL |
|---|
| linkedin.com/in/maya-lindqvist |
| linkedin.com/in/tom-okafor |
| linkedin.com/in/lea-moreau |
Trusted by 38,000+ users at startups and Fortune 500 teams
Works with any tool that can send HTTP requests
Claude
Cursor
Codex
Make
n8n
Zapier
- Your own code
Pick Your Way In
Let an AI assistant or your automation tool do the setup, or call the REST API from your own code.
Paste the setup prompt
Copy the prompt for Claude Code, Codex 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.
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 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 resultUsing 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 keyContent-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
@idfrom 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.
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 you get back
- The phone number: In international format, with the country prefix
- The country: Two-letter country code of the number
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
What Teams Build With It
Put Waterfall Phone Finder wherever your data already flows.
Add calls to your sequence
- LinkedIn URL of a lead
- 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.
Call candidates directly
- Candidate LinkedIn URL
- Saved in your ATS
Reach shortlisted candidates by phone instead of waiting for an InMail answer.
Complete high-value contacts
- Key accounts in the CRM
- Number on the contact
Run the lookup only for decision makers on your target accounts, so you spend credits where a call matters.
What Will It Cost You?
Pay per lookup with credits. API access starts on the Growth plan.
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 at 500 credits per number found (the maximum, if every row returns a result)
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.
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.
{
"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)
- /v1/enrichments/waterfall-phone-finder
- Read the schema, no key needed
- POST
- /v1/enrichments/tasks
- Create a task
- /v1/enrichments/tasks/{taskId}
- Poll status and progress
- /v1/enrichments/tasks/{taskId}/results
- Read results, 1 to 100 per page
- POST
- /v1/enrichments/tasks/{taskId}/stop
- Cancel a running task
- /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
cacheAgeAllowed Cache Age | Text | Results are cached to avoid paying multiple times for the same search. Configure the cache limit here. Default to 30 days.Allowed values: |
|---|---|---|
useCustomAPIKeysCustom Waterfall | Boolean | Check this setting to customize the Waterfall sequence and use your own API Keys. |
customSequenceWaterfall Sequence | JSON list | Define each provider and configure your API Keys. Enabled when: |
customSequence[].providerProvider | Text | Allowed values: Enabled when: |
customSequence[].apiKeyProvider API Key | Text | When configuring your sequence, you have to provide your API Key for each provider. Enabled when: |
Inputs (data)
profileUrlrequiredLinkedIn Profile | Text | 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
phoneNumberPhone Number | Text | Phone Number found in international format (with country prefix). |
|---|---|---|
phoneNumberCountryCountry | Text | 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. |
finderProviderProvider | Text | Which Phone Finder provider returned the result. Enabled when: |
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: BearerfromPOST /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
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.


