# Instasent Docs

> Developer documentation for the Instasent APIs. Product API manages organizations, projects and audiences. Ingest API streams contacts and events. Transactional API sends SMS over HTTP and SMPP. Legacy API is kept alive for existing integrations. Each API has a machine-readable dump under /{api}/llms-full.txt.

## Getting Started

- [Introduction](https://docs.instasent.com/getting-started/introduction): Instasent is a customer messaging platform with four public APIs.
- [Create an account](https://docs.instasent.com/getting-started/create-an-account): scaffolding
- [Choose your API](https://docs.instasent.com/getting-started/choose-your-api): scaffolding

## Product API

- [Guide](https://docs.instasent.com/product-api/guide): scaffolding
- [Quickstart](https://docs.instasent.com/product-api/quickstart): scaffolding
- [Authentication](https://docs.instasent.com/product-api/authentication): scaffolding
- [Rate limits](https://docs.instasent.com/product-api/rate-limits): scaffolding
- [Errors](https://docs.instasent.com/product-api/errors): scaffolding
- [Audience query filter](https://docs.instasent.com/product-api/audience-query-filter): scaffolding
- [Audience event query filter](https://docs.instasent.com/product-api/audience-event-query-filter): scaffolding
- [Webhooks](https://docs.instasent.com/product-api/webhooks): scaffolding
- [MCP](https://docs.instasent.com/product-api/mcp): scaffolding
- [Reference](https://docs.instasent.com/product-api/reference): scaffolding

## Ingest API

- [Guide](https://docs.instasent.com/ingest-api/guide): scaffolding
- [Quickstart](https://docs.instasent.com/ingest-api/quickstart): scaffolding
- [Authentication](https://docs.instasent.com/ingest-api/authentication): scaffolding
- [Rate limits](https://docs.instasent.com/ingest-api/rate-limits): scaffolding
- [Errors](https://docs.instasent.com/ingest-api/errors): scaffolding
- [Reference](https://docs.instasent.com/ingest-api/reference): scaffolding

## Transactional API

- [Overview](https://docs.instasent.com/transactional-api/overview): scaffolding
- **HTTP**
  - [Quickstart](https://docs.instasent.com/transactional-api/http/quickstart): Send your first SMS over the Transactional API in under five minutes.
  - [Authentication](https://docs.instasent.com/transactional-api/http/authentication): scaffolding
  - [Rate limits](https://docs.instasent.com/transactional-api/http/rate-limits): scaffolding
  - [Errors](https://docs.instasent.com/transactional-api/http/errors): scaffolding
  - [DLRs](https://docs.instasent.com/transactional-api/http/dlrs): scaffolding
- **SMPP**
  - [Authentication](https://docs.instasent.com/transactional-api/smpp/authentication): scaffolding
  - [Integration](https://docs.instasent.com/transactional-api/smpp/integration): scaffolding
- **SDKs**
  - [Node.js](https://docs.instasent.com/transactional-api/sdks/node): scaffolding
  - [PHP](https://docs.instasent.com/transactional-api/sdks/php): scaffolding
  - [Python](https://docs.instasent.com/transactional-api/sdks/python): scaffolding
  - [Ruby](https://docs.instasent.com/transactional-api/sdks/ruby): scaffolding
  - [Java](https://docs.instasent.com/transactional-api/sdks/java): scaffolding
- [Reference](https://docs.instasent.com/transactional-api/reference): scaffolding

## Legacy API

- [Authentication](https://docs.instasent.com/legacy-api/authentication): scaffolding
- [Reference](https://docs.instasent.com/legacy-api/reference): scaffolding

## Further reading

- [Query Filter](https://docs.instasent.com/further-reading/query-filter): Shared syntax for filtering, sorting, paginating and grouping results on index endpoints across every Instasent API.
- [Use with AI](https://docs.instasent.com/further-reading/use-with-ai): These docs are published as machine-readable artifacts alongside the HTML.

## Changelog

- [Changelog](https://docs.instasent.com/changelog): scaffolding

## Machine-readable dumps

- [transactional-api (full)](https://docs.instasent.com/transactional-api/llms-full.txt): every page under /transactional-api concatenated.

## OpenAPI specs

- [Product API spec](https://docs.instasent.com/openapi/product.openapi.yaml)
- [Ingest API spec](https://docs.instasent.com/openapi/ingest.openapi.yaml)
- [Transactional API spec](https://docs.instasent.com/openapi/transactional.openapi.yaml)
- [Legacy API spec](https://docs.instasent.com/openapi/legacy.openapi.yaml)