API Documentation
SIE Data provides a RESTful API for accessing government-verified contacts, intent signals, and enrichment data. All endpoints use JSON and require authentication via API key.
https://api.siedata.devExplore the API
Authentication
API key types, scopes, rotation, and security best practices.
Contacts API
Search 11M+ contacts, reveal details, batch operations.
Signals API
Query and stream intent signals by industry, geography, and freshness.
Enrichment API
Multi-provider automated enrichment with BYOK support.
Webhooks
Real-time event delivery with HMAC signature verification.
Auto-Buy API
Automated signal purchasing with budget controls.
Getting Started
Get your API key
Sign up for a free account and generate an API key from the dashboard. Free tier includes 25 credits per month.
Make your first request
Search for contacts by industry and geography. Every response includes preview data — reveal to get full contact details.
curl https://api.siedata.dev/api/v1/contacts/search?q=dentist&state=TX \ -H "X-API-Key: vpx_live_YOUR_KEY"
Explore endpoints
Browse the full API reference using the sidebar. Each section includes request/response examples, parameter tables, and code snippets in multiple languages.
Sovereign Trust Engine (STE)
Every signal passes through our Sovereign Trust Engine (STE) — a 4-layer human verification system using Cloudflare Turnstile, bot detection, behavioral analysis, and device consistency checks. Signals with higher trust scores command premium pricing.
MCP Integration
SIE Data supports Model Context Protocol (MCP) for AI agent integration. AI assistants and autonomous agents can query contacts, signals, and enrichment data programmatically through our standard REST API.