# Hookdeck Transformations API

**Canonical:** https://apis.io/apis/hookdeck/hookdeck-transformations-api/  
**Provider:** Hookdeck — https://apis.io/providers/hookdeck/  
**Base URL:** https://api.hookdeck.com/2025-07-01  
**Documentation:** https://hookdeck.com/docs/transformations

Hookdeck Transformations API is one of 17 APIs that [Hookdeck](https://apis.io/providers/hookdeck/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. This API exposes 1 JSON Schema definition. Tagged areas include Transformation, Webhook, and Event Gateways. The published artifact set on APIs.io includes API documentation, an OpenAPI specification, and 1 JSON Schema.

Manage transformations — sandboxed JavaScript executed against events to mutate headers, body, path, or query string before delivery. Also includes a sandboxed run endpoint for testing transformation code against sample event payloads.

## Machine-readable artifacts (3)

- **Documentation** — https://hookdeck.com/docs/transformations
- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/hookdeck/refs/heads/main/openapi/hookdeck-transformations-api-openapi.yml
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/hookdeck/refs/heads/main/json-schema/hookdeck-transformation-schema.json

## Other Hookdeck APIs (12)

- [Hookdeck Connections API](https://apis.io/apis/hookdeck/hookdeck-connections-api/)
- [Hookdeck Sources API](https://apis.io/apis/hookdeck/hookdeck-sources-api/)
- [Hookdeck Destinations API](https://apis.io/apis/hookdeck/hookdeck-destinations-api/)
- [Hookdeck Events API](https://apis.io/apis/hookdeck/hookdeck-events-api/)
- [Hookdeck Requests API](https://apis.io/apis/hookdeck/hookdeck-requests-api/)
- [Hookdeck Bookmarks API](https://apis.io/apis/hookdeck/hookdeck-bookmarks-api/)
- [Hookdeck Issues API](https://apis.io/apis/hookdeck/hookdeck-issues-api/)
- [Hookdeck Metrics API](https://apis.io/apis/hookdeck/hookdeck-metrics-api/)
- [Hookdeck Integrations API](https://apis.io/apis/hookdeck/hookdeck-integrations-api/)
- [Hookdeck Notifications API](https://apis.io/apis/hookdeck/hookdeck-notifications-api/)
- [Hookdeck Attempts API](https://apis.io/apis/hookdeck/hookdeck-attempts-api/)
- [Hookdeck Bulk cancel events API](https://apis.io/apis/hookdeck/hookdeck-bulk-cancel-events-api/)

## Tags

Transformation, Webhook, Event Gateways

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