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Apollo

Apollo

85

B2B sales intelligence API with 210M+ contacts and 30M+ companies — people/company enrichment, search, and prospecting via a REST API.

API KeyFreemiumJSONBot Blocking: NoneNo CCpeople-searchcompany-enrichmentpeople-enrichmentprospectingemail-finderlead-generationb2b-data

Pros

  • + Massive dataset (210M+ contacts, 30M+ companies) with structured JSON responses — agents get rich firmographic and demographic data in a single call
  • + People Search endpoint does not consume credits, so agents can search and filter freely before committing credits to enrichment
  • + Simple API Key auth via x-api-key header and straightforward REST endpoints make integration trivial for any agent framework

Cons

  • - Credit-based pricing adds complexity for agents — different actions cost different credit amounts (1 for email, 5 for mobile), requiring agents to track budget
  • - No official OpenAPI spec, so agents can't auto-discover endpoints or generate typed clients without manual setup

Integration

example.py
import requests
headers = {    "Content-Type": "application/json",    "Cache-Control": "no-cache",    "x-api-key": "YOUR_API_KEY"}
# Enrich a person by emailresp = requests.post(    "https://api.apollo.io/api/v1/people/match",    headers=headers,    json={"email": "[email protected]", "reveal_personal_emails": False})person = resp.json()["person"]print(person["name"], person["title"], person["organization"]["name"])
Documentation Website

Details

Category
People Search
Pricing
Freemium
Free Tier
Free plan includes basic API access, 10,000 email credits/month (corporate domain), 5 mobile credits/month, 10 export credits/month. No credit card required. Paid plans start at $49/user/month (Basic).
Rate Limit
Free: 50 req/min, 600/day. Basic/Pro: 200 req/min, 2,000/day. Enrichment endpoints: 100/min with 10/sec burst.
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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