> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sixtyfour.ai/llms.txt
> Use this file to discover all available pages before exploring further.
# API Quick Start
> Authentication, base URL, rate limits, and API overview for the Sixtyfour API.
## API Playground
Explore every endpoint interactively before writing a line of code. The [API Playground](https://app.sixtyfour.ai/playground/) lets you build requests, inspect live responses, and copy generated code snippets directly into your project.
Run live API requests against Company Intelligence, People Intelligence, Find Email, Find Phone, and more — no setup required.
## Authentication
All API requests require an API key passed in the `x-api-key` header. You also need to set the `Content-Type` header to `application/json`.
```http theme={null}
x-api-key: YOUR_API_KEY
Content-Type: application/json
```
## Get an API Key
Follow the steps in [Get an API Key](/get-api-key) to create your account and generate a key.
## Base URL
All API endpoints are available at:
```
https://api.sixtyfour.ai
```
## Endpoints
| Endpoint | Description |
| -------------------------------------------------------------------- | ------------------------------------------------------------------------------------------- |
| [Company Intelligence](/api-reference/endpoint/company-intelligence) | Research and enrich company data with additional information and find associated people |
| [People Intelligence](/api-reference/endpoint/people-intelligence) | Research and enrich people profiles with contact details, social profiles, and company data |
| [Find Email](/api-reference/endpoint/find-email) | Find professional or personal email addresses for leads |
| [Find Phone](/api-reference/endpoint/find-phone) | Find phone numbers for leads |
| [QA Agent](/api-reference/endpoint/qa-agent) | Evaluate and qualify data against predefined criteria |
| [Webhooks](/api-reference/webhooks) | Receive HTTP notifications when async jobs complete |
| [Workflows](/api-reference/workflows/workflows-overview) | Create, manage, and execute batch enrichment pipelines |
| [Deep Search](/api-reference/search/search-overview) | Run agentic deep searches with natural language queries; poll status and download results |
| [Filter Search](/api-reference/search/filter-search) | Search people or companies with structured filters; supports cursor pagination |
## Error Handling
See [Errors](/api-reference/errors) for status codes, error shapes, and retry guidance.
## Rate Limits
See [Rate Limits](/api-reference/errors#rate-limits) for limits and retry guidance.
## Deprecation Notice
The `findings` field in API responses is deprecated. It currently returns an empty list and will be removed in a future update. Use `structured_data` and `notes` instead.
## Quick Start Examples
Use this example to find an email address with a single cURL request:
### Request
```bash theme={null}
curl -X POST "https://api.sixtyfour.ai/find-email" \
-H "x-api-key: YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"lead": {
"name": "Saarth Shah",
"company": "Sixtyfour AI"
}
}'
```
### Response
```json theme={null}
{
"company": "Sixtyfour AI",
"email": [
["saarth@sixtyfour.ai", "OK", "COMPANY"]
],
"name": "Saarth Shah",
"cost_cents": 5
}
```
Use this example to find a phone number with a single cURL request:
### Request
```bash theme={null}
curl -X POST "https://api.sixtyfour.ai/find-phone" \
-H "x-api-key: YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"lead": {
"name": "Saarth Shah",
"company": "Sixtyfour AI"
}
}'
```
### Response
```json theme={null}
{
"company": "Sixtyfour AI",
"name": "Saarth Shah",
"phone": "+1 415-990-2048",
"cost_cents": 30
}
```
Use this example to enrich a company with a single cURL request:
```bash theme={null}
curl -X POST "https://api.sixtyfour.ai/company-intelligence" \
-H "x-api-key: YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"target_company": {
"company_name": "Sixtyfour AI",
"website": "https://sixtyfour.ai"
},
"struct": {
"industry": "Primary business sector",
"num_employees": "Approximate employee count"
}
}'
```
### Response
```json theme={null}
{
"confidence_score": 9.0,
"findings": [], // Deprecated - will be removed in a future update. Use structured_data and notes instead.
"notes": "Sixtyfour AI Inc., verified by domain sixtyfour.ai, is a San Francisco-based AI company focused on developing an orchestration layer for company and people intelligence using AI research agents. The company builds AI research agents that enrich people and company data on demand, enabling data enrichment, email finding, and custom research APIs for sales intelligence and prospecting workflows. The official website is https://sixtyfour.ai and the SaaS product interface is available at https://app.sixtyfour.ai. Developer documentation is provided at https://docs.sixtyfour.ai/introduction. The company is SOC 2 Type 2 compliant (https://compliance.sixtyfour.ai/overview), underlining a commitment to security and compliance. The legal name is Sixtyfour AI Inc., and the company is privately held, founded in 2025 with headquarters in San Francisco, California, United States. The employee count is approximately 6-7, with key executives including co-founders Saarth Shah and Christopher Price, and founding engineers Hashim Khawaja and Erik Scarlatescu as per LinkedIn data. The company received a pre-seed funding round led by Y Combinator, raising $500,000. Industry classification is Research Services, focusing on artificial intelligence, market research, and sales. The LinkedIn company profile URL is https://www.linkedin.com/company/sixtyfourai, verified to belong to the target company. Twitter presence is at https://www.twitter.com/sixtyfourai. The company leverages a mature tech stack including Python, OpenAI, Elasticsearch, Redis, React, and more. Active job postings include roles in AI engineering and operations.",
"org_chart": null,
"references": {
"https://app.sixtyfour.ai": "Sixtyfour AI SaaS application login and product platform.",
"https://app.sixtyfour.ai/login": "Sixtyfour AI SaaS platform login page",
"https://compliance.sixtyfour.ai/overview": "Compliance and SOC 2 Type 2 certification overview of Sixtyfour AI.",
"https://docs.sixtyfour.ai/introduction": "Official Sixtyfour AI developer documentation site.",
"https://sixtyfour.ai": "Official Sixtyfour AI website, source of company description and product information.",
"https://www.linkedin.com/company/sixtyfourai": "Sixtyfour AI LinkedIn company profile provides company overview, employees, and executive information.",
"https://www.sixtyfour.ai": "Official website of Sixtyfour AI - company overview and platform details"
},
"structured_data": {
"company_name": "Sixtyfour AI",
"industry": "Intelligence infrastructure (AI-powered people & company intelligence)",
"num_employees": "Approximately 6-7",
"website": "https://sixtyfour.ai"
}
}
```