---
title: "AtProto"
section: experiments
description: "Three ATProto tools: Nimbus handles firehose and backfill via Cloudflare Durable Objects; Sonde is an AT Protocol explorer; atproto-wc provides framework-agnostic web components with no AppView dependency."
tags: ["atproto", "cloudflare-workers", "durable-objects", "web-components", "json-events", "pds"]
published: 2026-09-20T05:15:08Z
updated: 2026-09-20T05:15:08Z
cid: bafkreie6xxysrtkw6gqawj3y5ri7bzyheit6hous7bblk3q7khsxrgb5ly
html: https://iammatthias.com/experiments/1789491418000-atproto
---

# AtProto

- Nimbus: [REPO](https://github.com/iammatthias/nimbus)\
A Cloudflare Worker implementation of [TAP](https://github.com/bluesky-social/atproto/tree/main/packages/tap) (Repository Sync) for the AT Protocol, using Durable Objects for state management.Nimbus handles firehose connections, backfill, and filtering to provide simple JSON events for AT Protocol repositories.
- Sonde: [REPO](https://github.com/iammatthias/sonde) [PROJECT](https://sonde.blue/)\
What started as a way to render the byte-array memory that [Koios](https://koio.sh/) stores on its PDS quickly snowballed into something else. [sonde.blue](https://sonde.blue/) is a new AT Protocol explorer. It has issues, is rough around the edges, and I'm having a lot of fun with it right now.
- atproto-wc: [REPO](https://github.com/iammatthias/atproto-wc)  [NPM](https://www.npmjs.com/package/atproto-wc) [PROJECT](https://atproto-wc.iammatthias.com)\
Framework-agnostic web components for ATProto. Content via PDS-direct reads, engagement via the [Constellation](https://constellation.microcosm.blue/) backlink index. **No Bluesky AppView dependency.**

---

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