# API Resources Developer Docs

> Work with subscribers, tags, custom fields, forms, landing pages, segments, and asynchronous import or export jobs.

- Human page: https://mailrith.com/developers/category/resources
- Markdown page: https://mailrith.com/developers/category/resources.md
- Guide count: 13
- Last updated: 2026-07-13
- Related keywords: API Resources, API Resources developer docs, Mailrith developer docs, Mailrith public API, Subscribers API, Tags API, Custom Fields API, Forms API, Landing Pages API, Broadcasts API, Email Templates API, Sequences API, Automations API, Magic Links API, Segments API, Import and Export Jobs, Webhook Subscriptions API

Agent notes:
- Use these category links to choose the most specific Mailrith developer guide before writing integration code.
- Use the OpenAPI document for exact request and response schemas.

## Guides
- [Subscribers API](https://mailrith.com/developers/subscribers.md): The subscribers resource is the main way integrations write Subscriber data in `v1`. This guide explains when to list subscribers, when to upsert subscribers, how Mailrith chooses the workspace, what to include in an upsert body, and when to use async imports instead of many single requests.
- [Tags API](https://mailrith.com/developers/tags.md): The tags API gives integrations a lightweight way to manage subscriber labels. This guide explains when to use tags, when to use custom fields instead, how to list or create tags, and how to name tags so workspace users understand each label.
- [Custom Fields API](https://mailrith.com/developers/custom-fields.md): Custom fields define the typed workspace schema shared by subscribers, forms, and segments. This guide explains how to choose field types, map external data sources, create field definitions, and avoid schema changes that break forms or reports.
- [Forms API](https://mailrith.com/developers/forms.md): The forms API lets integrations manage capture forms outside the app. This guide explains when to list, create, update, or delete forms, how forms depend on fields and tags, and how to update live forms without breaking website signups.
- [Landing Pages API](https://mailrith.com/developers/landing-pages.md): The landing pages API lets integrations manage hosted capture pages outside the app. This guide explains when to list, create, update, or delete landing pages, how page definitions depend on tags and fields, and how to update public pages safely.
- [Broadcasts API](https://mailrith.com/developers/broadcasts.md): The broadcasts resource is the public campaign control plane for one-off messages. This guide explains draft management, test sends, live-send safety, and why integrations and agents should treat send actions as high-impact operations.
- [Email Templates API](https://mailrith.com/developers/email-templates.md): The email templates resource supports migrations, governance, and external template sync. This guide explains when to use templates, how to preserve structured editor content, and how to keep template names and descriptions useful for workspace users.
- [Sequences API](https://mailrith.com/developers/sequences.md): The sequences resource lets external systems prepare, migrate, or synchronize time-based email series. This guide explains how to plan sequence definitions, when to update or delete sequences, and what to check before migrated journeys reach real subscribers.
- [Automations API](https://mailrith.com/developers/automations.md): The automations resource exposes Mailrith workflow definitions for tools that create or synchronize automations outside the app. This guide explains what automations can affect, how to use the public schema, and what to review before you trust a generated workflow.
- [Magic Links API](https://mailrith.com/developers/magic-links.md): The magic links resource lets external tools create and maintain subscriber action links. This guide explains where to use magic links, how to match each action with the correct destination, and how to test links before live campaigns.
- [Segments API](https://mailrith.com/developers/segments.md): The segments API supports saved segment definitions, imported subscriber rules, and previews for unsaved logic. This guide explains how segments behave, when to save segments, and why preview is the safest step before using complex subscriber rules.
- [Import and Export Jobs](https://mailrith.com/developers/jobs.md): Imports and exports are asynchronous in `v1`. This guide explains when to queue a job, how import mappings and export filters work at a high level, how to use idempotency, and how to monitor final job status without confusing queued work with completed work.
- [Webhook Subscriptions API](https://mailrith.com/developers/webhook-subscriptions.md): Webhook subscriptions let external systems receive Mailrith events for syncs, dashboards, fulfillment, and audit trails. This guide explains when to use webhooks, how to manage subscriptions, why you must store the signing secret immediately, and how receivers should verify and deduplicate deliveries.