> ## Documentation Index
> Fetch the complete documentation index at: https://doc.indexbrain.online/llms.txt
> Use this file to discover all available pages before exploring further.

# Apollo.io

> Search Apollo's people database, look up companies, and read your saved contacts.

Connect Indexbrain to Apollo to search for people, look up companies, and read your saved contacts — read-only.

## Setup

<Steps>
  <Step title="Create an API key">
    In Apollo, go to **Settings > Integrations > API > API Keys** and create a new key.
  </Step>

  <Step title="Go to Integrations">
    Navigate to **Settings > Integrations > Apollo**.
  </Step>

  <Step title="Add your API key">
    Paste the key and connect.
  </Step>

  <Step title="Test the connection">
    Ask Indexbrain to search for people at a target company.
  </Step>
</Steps>

<Note>
  Access and rate limits depend on your Apollo plan — some capabilities may
  require a master key. Anyone with the key can take actions in your Apollo
  account, so treat it like a password.
</Note>

## Capabilities

### People search

```
Find contacts who are VPs of Engineering at SaaS companies with 200 to 1000 employees.
```

Searches Apollo's full people database — not just contacts already saved to your account — filtered by job title, seniority, company size, and location.

<Warning>
  Apollo's People Search API does not return email or phone numbers, by
  Apollo's own design — only identity, title, and company information. Full
  contact-detail enrichment for a specific person isn't built here.
</Warning>

### Company lookup

```
Look up Acme Corp and summarize its size, industry, and technologies.
```

Returns a company's size, industry, technology stack, description, and location — matched by domain (most reliable) or name.

### Saved contacts

Contacts already saved in your connected Apollo account are synced automatically and searchable like any other connected source:

```
What do we know about our saved Apollo contacts at Acme Corp?
```

## What Indexbrain does not do in Apollo (yet)

* **No bulk domain enrichment** — enriching a list of company domains in one batch isn't supported; use company lookup one at a time.
* **No sequence/campaign analytics** — reply rates and performance on Apollo sales sequences aren't available. This is a separate Apollo product area (sales engagement, not data/contacts).
* **No write access** — Indexbrain cannot create, update, or add contacts/sequences in Apollo.

## Troubleshooting

<AccordionGroup>
  <Accordion title="People search returns no results">
    * Confirm your API key has search access — some Apollo plans restrict certain endpoints to a master key.
    * Try broadening your filters (fewer titles, a wider employee range).
  </Accordion>

  <Accordion title="Company lookup can't find a company">
    * Try the domain instead of the name — domain matches are more reliable.
  </Accordion>

  <Accordion title="I need email or phone for a person I found in search">
    * Not available through Indexbrain's People Search today — Apollo's own API separates search from contact enrichment, and enrichment isn't built here.
  </Accordion>
</AccordionGroup>