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Connecting Apollo.io

The simplest of the lot. Apollo only needs an API key — paste it, you’re done.

3 min read Updated June 2026

Apollo.io’s setup is single-input: your API key. No subdomains, no account emails, no OAuth flow.

Before you start

  • Apollo plan that includes API access (the free plan does, with rate limits).

Step 1 — Generate your Apollo API key

1

In Apollo, click Settings (gear icon, top right) → Integrations.

2

Find API in the integrations list → click Connect (if not already on).

3

Copy your API key.

Step 2 — Paste it into Anexus

1

In Anexus, Settings → CRM Integrations → Apollo.io → Connect.

2

Paste the API key. Click Save & connect.

What syncs to Apollo

Each captured contact becomes an Apollo Contact with:

  • First name, last name (or just full name)
  • Email
  • Organization name
  • Title
  • Direct phone

If something goes wrong

"Apollo rejected the API key"

The key may have been regenerated since you copied it, or your plan doesn’t include API access. Re-copy from Settings → Integrations → API.

Rate limit errors during Sync past contacts

Apollo’s free plan has tight rate limits. If a batch sync fails partway, just wait a few minutes and click Sync past contacts again — pending contacts pick up where they left off.

How to disconnect

Click Disconnect in Anexus. To revoke on Apollo’s side: Settings → Integrations → API → Regenerate.

What’s next