# POSTA

> POSTA is email infrastructure for developers. It provides a REST API, Node/TypeScript SDK, dashboard, custom sending domains, templates, webhooks, delivery logs, email validation, scheduled and batch sending, and inbound email workflows.

The production API base URL is `https://posta.esaart.studio`. Authenticate API requests with `Authorization: Bearer pa_...`. API keys are created in the POSTA dashboard. Never use POSTA API keys in browser or mobile client code; call POSTA from a trusted server.

## Documentation

- [Complete LLM reference](https://posta.esaart.studio/llms-full.txt): Product behavior, authentication, API fields, limits, SDK examples, webhooks, inbound email, and error handling in one Markdown document.
- [Developer documentation](https://posta.esaart.studio/docs): Human-readable quickstart and product documentation.
- [Protocol](https://posta.esaart.studio/protocol): Overview of sending, observability, domain identity, and inbound email.
- [Delivery network](https://posta.esaart.studio/network): Routing, delivery, and operational model.
- [Pricing](https://posta.esaart.studio/pricing): Current plans, monthly email allowances, and included features.
- [Security](https://posta.esaart.studio/security): Implemented credential, identity, webhook, quota, and reputation controls.
- [Changelog](https://posta.esaart.studio/changelog): Documented product and infrastructure changes.

## API

- [Send and list emails](https://posta.esaart.studio/api/v1/emails): `POST` sends one email; `GET` lists recent emails for full-permission keys.
- [Batch sending](https://posta.esaart.studio/api/v1/emails/batch): `POST` sends up to 100 emails with at most 100 total recipients.
- [Email validation](https://posta.esaart.studio/api/v1/validate): `POST` validates one address or a batch of up to 100 addresses.
- [Service health](https://posta.esaart.studio/api/health): Public operational health response for the web app, backend, email provider, and inbound MTA.
- [Human-readable status](https://posta.esaart.studio/status): Live visual status page backed by the public health response.

## Policies

- [Privacy policy](https://posta.esaart.studio/privacy): How POSTA handles personal and service data.
- [Terms of service](https://posta.esaart.studio/terms): Terms governing use of POSTA.
- [Abuse policy](https://posta.esaart.studio/abuse): Prohibited sending and abuse-reporting requirements.

## Optional

- [Customer stories](https://posta.esaart.studio/stories): Product narratives and use cases; not required for API integration.