> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.paid.ai/v-2/documentation/signals/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.paid.ai/_mcp/server.

# Signals

## Docs

- [Chart signal volume](https://docs.paid.ai/v-2/documentation/signals/chart-signal-volume.md): Count signals into period buckets, grouped by signal name or by a field in your signal payload
- [Send signals with a customer API key](https://docs.paid.ai/v-2/documentation/signals/send-signals-with-a-customer-api-key.md): Give a customer's own runtime a key that reports usage for that customer and nothing else