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Sixtyfour

Sixtyfour

85

Intelligence-grade enrichment API for people and companies — AI agents do deep research to surface verified contacts, firmographics, and real-time business signals.

API KeyPay-as-you-goJSONBot Blocking: NoneNo CCpeople-searchcompany-enrichmentlead-enrichmentemail-finderphone-finderasync-apiai-agents

Pros

  • + Flexible struct parameter lets agents define exactly which fields to return in natural language — no rigid schema to map
  • + Async endpoints with polling prevent timeout issues on long-running enrichment (P95 ~5 min), critical for agent orchestration
  • + Significantly higher enrichment coverage than Apollo/BuiltWith — surfaces data on even tiny businesses with a few employees

Cons

  • - No public pricing or free tier — agents can't self-provision, requires sales contact to get started
  • - Sync enrichment calls can take up to 15 minutes; agents must use async+polling pattern or risk HTTP timeouts

Integration

example.py
import requests
headers = {    "x-api-key": "YOUR_API_KEY",    "Content-Type": "application/json"}
# Enrich a leadresp = requests.post("https://api.sixtyfour.ai/enrich-lead", headers=headers, json={    "lead_info": {        "name": "Jane Smith",        "company": "Acme Corp",        "linkedin": "https://linkedin.com/in/janesmith"    },    "struct": {        "email": "Work email address",        "phone": "Direct phone number",        "title": "Current job title"    }})print(resp.json()["structured_data"])
Documentation Website

Details

Category
People Search
Pricing
Pay-as-you-go
Free Tier
No public free tier; contact sales for pricing and trial access
Rate Limit
500 req/min per API key
Verified
2026-03-31

Score Breakdown

Base +50
OpenAPI Spec (No) 0
Auth Complexity (API Key) +10
Response Format (JSON) +10
Bot Blocking (None) +10
No Credit Card (Yes) +5
Completely Free (No) 0
Total 85

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