For Developers

The Apollo API Alternative. $1/Contact. Government-Verified.

RESTful API with OpenAPI spec. Search 11M+ verified contacts (7.9M gov-verified) from NPI, FINRA, FMCSA, and state registries. Reveal from 1 credit. TypeScript SDK included.

Query B2B and consumer intent signals via API — 167 B2B signals (topic surge, vendor evaluation, switching intent) and 131 consumer signals (purchase readiness, declared preferences).

Get API Key Free View API Docs

Quick Start

Three API calls to go from search to automated delivery.

Search contacts

bash

curl -X POST https://api.siedata.dev/api/v1/contacts/search \
  -H "X-API-Key: vpx_live_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"query": "dentist", "state": "TX", "limit": 5}'

Reveal a contact

bash

curl -X POST https://api.siedata.dev/api/v1/contacts/abc123/reveal \
  -H "X-API-Key: vpx_live_YOUR_KEY"
# Returns: phone, email, website, full address — $1 deducted

Set up auto-buy

bash

curl -X POST https://api.siedata.dev/api/v1/buyer/auto-buy/rules \
  -H "X-API-Key: vpx_live_YOUR_KEY" \
  -d '{"industries": ["healthcare"], "states": ["TX","CA"], "min_confidence": 0.7}'

TypeScript SDK

Install the SDK and start searching in under a minute.

terminal

npm install @sie/intent-sdk

typescript

import { SIEClient } from '@sie/intent-sdk'

const client = new SIEClient({ apiKey: 'vpx_live_YOUR_KEY' })

const results = await client.contacts.search({
  query: 'dentist',
  state: 'TX',
})

const contact = await client.contacts.reveal(results[0].id)
console.log(contact.phone, contact.email)

Chrome Extension

Search contacts while you browse. Works on LinkedIn, Google Maps, and Google Search. See contact previews inline and reveal with one click. Email signature parsing — auto-detect contacts from Gmail and Outlook emails with consent-based "Save to SIE" button.

Uses the same API key and credits as your account.

Coming Soon

API Features

Contact Search

Filter 11M+ contacts by industry, geography, specialty, license type. Full-text + fuzzy matching.

Contact Reveal

1-6 credits per reveal. FCRA suppression check runs automatically. Contact enriched via automated multi-source enrichment.

Intent Signals

Subscribe to intent signals via webhook or API. Surge detection, buying readiness scoring, vendor evaluation.

Auto-Buy Rules

Set criteria and receive matched contacts automatically. Budget limits, daily caps, pause/resume.

Batch Operations

Bulk search and reveal. Export to CSV. Webhook delivery for large datasets.

BYOK Enrichment

Bring your own API keys for 29 enrichment providers. Or use our managed integrations.

Decision Maker Discovery

Query any company and identify key contacts by role, seniority, and department. Customizable per industry — find the Facilities Manager in Solar, the Practice Administrator in Healthcare.

Visitor Identification

Install our VI tag on your site. Identify visiting companies via IP-to-company resolution. Real-time webhook alerts when target accounts visit.

Outbound Sequencing API

Sequence enrollment API, ESP dispatch, SMS and voice APIs available. Trigger multi-channel outreach programmatically across 33 channels.

Rate Limits & Pricing

Start free. Scale as you grow.

Tier

Requests/hr

Reveals/mo

Price

Free

1,000

250

Pro

5,000

1,000

$99/mo

Team

25,000

10,000

$299/mo

Enterprise

Custom

100,000+

Custom

Compliance Built In

Every API call runs through our 7-stage compliance pipeline. FCRA suppression, identity hashing, and provenance tracking happen automatically. Our data comes from government-verified sources — not web scraping.

View full compliance details

Get Your API Key — Free

25 free credits/mo included. No credit card required.

Get API Key Free

No credit card. No annual contract. Cancel anytime.