> ## Documentation Index
> Fetch the complete documentation index at: https://docs.echozero.app/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> Dated API and documentation changes for EchoZero developers.

## 2026-07-07

* **Docs:** Production-complete developer documentation launch (concepts, tutorials, MCP catalog, recipes)
* **Docs:** Public OpenAPI spec excludes admin, cron, and internal webhook surfaces
* **Docs:** Signature test vectors for REST, inbound, and outbound HMAC
* **Docs:** Inbound agent signals tag renamed to `Inbound Agent Signals` (no em-dash slug)

## 2026-06-23

* **Signals (#1098):** Full structured signal envelope with 10 `eventType` values, `positionRef` lifecycle, Hyperliquid perps
* **Inbound webhook:** Per-agent `ezw_` HMAC signing with canonical JSON

## 2026-06-18

* **MCP:** OAuth 2.1 + PKCE for assistant clients
* **MCP:** Streamable HTTP transport at `/mcp` with session-bound credentials
* **MCP:** 70+ tools, 10 resources, 4 prompts

## 2026-06-01

* **API v1 baseline:** Agents, strategies, wallet, developer earnings, marketplace browse
* **Rate limiting:** Tiered limits with `X-RateLimit-*` headers

## Subscribe to updates

Register in the [Dev Portal](https://devportal.echozero.app) and watch [echozero-docs](https://github.com/EchoZeroApp/echozero-docs) on GitHub.

See also [Versioning policy](/guides/versioning).