## Documentation Index

Fetch the complete documentation index at: [/llms.txt](https://docs.m3ter.com/llms.txt)

Use this file to discover all available pages before exploring further.

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m3ter is an API-first platform. When you’ve created your Meters and their data-collection fields, you can use the _Submit Measurements_ API call to m3ter’s _Ingest API_ to submit usage data into those fields:

> **POST**`/organizations/{orgid}/measurements`

For more details on the Submit Measurements API call to the Ingest API, see:

- The [Submit measurements](https://docs.m3ter.com/api/measurements/submit-measurements) API Reference Docs page.
- The [Getting Started with API Calls](https://docs.m3ter.com/guides/m3ter-apis/getting-started-with-api-calls) topic, which provides an example of the call with code snippets for different languages you can copy.

**Important! Request Rate and Payload Limits**. The Ingest API is designed to handle high request rates and offers high payload-per-request size. However, we impose limits on request rate and request payload size. See [m3ter APIs](https://docs.m3ter.com/guides/m3ter-apis)