# 75F Haystack API

**Canonical:** https://apis.io/apis/75f/75f-haystack-api/  
**Provider:** 75F — https://apis.io/providers/75f/  
**Base URL:** https://api.75f.io/ph  
**Documentation:** https://support.75f.io/hc/en-us/articles/5459129016595-75F-External-API-s-Overview

75F Haystack API is one of 2 APIs that [75F](https://apis.io/providers/75f/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Project Haystack, Building Data, Time Series, and Building Automation. The published artifact set on APIs.io includes API documentation, an API reference, and a getting-started guide.

75F's Project Haystack-compliant external REST API. Reads Haystack entity records by filter or by id (read), reads time-series history for many points at once (hisReadMany), and writes to writable points and historized points (pointWrite, hisWriteMany). Requests carry an OAuth 2.0 bearer token plus a product-scoped Ocp-Apim-Subscription-Key; responses are Haystack grids in JSON or ZINC.

## Machine-readable artifacts (4)

- **Documentation** — https://support.75f.io/hc/en-us/sections/5484889695123-API-s-for-Integrations
- **APIReference** — https://support.75f.io/hc/en-us/articles/5460066903827-Read-API
- **GettingStarted** — https://support.75f.io/hc/en-us/articles/5509604551443-Accessing-the-API
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/75f/refs/heads/main/apis.yml

## Other 75F APIs (1)

- [75F Special Schedules API](https://apis.io/apis/75f/75f-special-schedules-api/)

## Tags

Project Haystack, Building Data, Time Series, Building Automation

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/75f/75f-haystack-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/75f/.