# API Documentation | HelloData

## Instructions for AI Agents

- For clean Markdown of any page, append `.md` to the page URL
- For section-specific indexes, append `/llms.txt` to any section URL
- For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.hellodata.ai/_mcp/server

## Docs

- [HelloData's API Documentation 👋](https://docs.hellodata.ai/documentation/start-here/welcome-to-hello-data-api.md): Make real-time data your competitive advantage!
- [Authentication](https://docs.hellodata.ai/documentation/start-here/authentication.md): It all starts with an API key...
- [Pricing](https://docs.hellodata.ai/documentation/start-here/pricing.md): How we charge for API usage
- [Changelog](https://docs.hellodata.ai/documentation/start-here/changelog/llms.txt)
- [Rate Limits](https://docs.hellodata.ai/documentation/concepts/rate-limits.md): Ensuring fair usage and reliability
- [Respecting Rate Limits](https://docs.hellodata.ai/documentation/concepts/respecting-rate-limits.md): Wait and retry using response headers
- [Common Error Codes](https://docs.hellodata.ai/documentation/concepts/common-error-codes.md): What they mean and what to do next
- [Common Calculations](https://docs.hellodata.ai/documentation/concepts/common-calculations.md): How to compute metrics from property data
- [Data Ingestion Timeline](https://docs.hellodata.ai/documentation/concepts/ingestion-timeline.md): What does the data ingestion timeline look like?
- [Deprecations](https://docs.hellodata.ai/documentation/concepts/deprecations.md): Improvements sometimes require changes
- [Property Search](https://docs.hellodata.ai/documentation/examples/property-search.md): Find the properties you want to know everything about
- [Property Details & History](https://docs.hellodata.ai/documentation/examples/property-details-history.md): Access the most comprehensive property data, and our AI-powered insights
- [Identify Comparables](https://docs.hellodata.ai/documentation/examples/identify-comparables.md): Instant comparables for any subject property in the US
- [Market Rents](https://docs.hellodata.ai/documentation/examples/price-recommendations.md): Price available units based on what just closed among your competitors
- [Property ID Changes](https://docs.hellodata.ai/documentation/examples/property-id-changes.md)
- [Dataset Webhook Export](https://docs.hellodata.ai/documentation/examples/dataset-export.md): Export large datasets asynchronously with webhook notifications
- [Contact Us](https://docs.hellodata.ai/documentation/support/contact-us.md): Need help? We're here for you.

## API Docs

- API Reference > Property Report [List](https://docs.hellodata.ai/api-reference/api-reference/property-report/list.md)
- API Reference > Property Report [Search](https://docs.hellodata.ai/api-reference/api-reference/property-report/search.md)
- API Reference > Property Report [Search Tags](https://docs.hellodata.ai/api-reference/api-reference/property-report/search-tags.md)
- API Reference > Property Report [Reports By Tag](https://docs.hellodata.ai/api-reference/api-reference/property-report/reports-by-tag.md)
- API Reference > Property Report [Update Metadata](https://docs.hellodata.ai/api-reference/api-reference/property-report/update-metadata.md)
- API Reference > Property [Search](https://docs.hellodata.ai/api-reference/api-reference/property/search.md)
- API Reference > Property [Get Property](https://docs.hellodata.ai/api-reference/api-reference/property/get-property.md)
- API Reference > Property [Comparables](https://docs.hellodata.ai/api-reference/api-reference/property/comparables.md)
- API Reference > Property [Post Property](https://docs.hellodata.ai/api-reference/api-reference/property/post-property.md)
- API Reference > Property [Market Rents](https://docs.hellodata.ai/api-reference/api-reference/property/market-rents.md)
- API Reference > Property [Expense Benchmarks](https://docs.hellodata.ai/api-reference/api-reference/property/expense-benchmarks.md)
- API Reference > Market [Market Search](https://docs.hellodata.ai/api-reference/api-reference/market/market-search.md)
- API Reference > Market [Shape Search](https://docs.hellodata.ai/api-reference/api-reference/market/shape-search.md)
- API Reference > Dataset [Dataset Export Async](https://docs.hellodata.ai/api-reference/api-reference/dataset/dataset-export-async.md)

## OpenAPI Specification

The raw OpenAPI 3.1 specification for this API is available at:
- [OpenAPI JSON](https://docs.hellodata.ai/openapi.json)
- [OpenAPI YAML](https://docs.hellodata.ai/openapi.yaml)