Waggle – A search engine for A2A protocol agents

Name: Waggle – A search engine for A2A protocol agents
Availability: InStock
Author: enmerk4r

by enmerk4r·Feb 24, 2026·1 point·0 comments

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AI Analysis

●●SolidBig BrainNiche Gem

A2A protocol search engine, but adoption depends on whether agents actually use the standard.

Strengths

•Addresses real fragmentation: A2A agents scattered across repos and subdomains with no central discovery—health monitoring tracks uptime.
•Meta-agent delegation is clever: Waggle itself is A2A-compliant and can forward tasks to indexed agents, demonstrating the protocol.
•Clean landing page, semantic search, REST API, and smart health tracking show thoughtful product design.

Weaknesses

•Only 48 agents online; ecosystem still nascent—utility scales with adoption, which is uncertain.
•A2A protocol itself is Google's spec; Waggle is entirely dependent on whether the broader web embraces it.

Post Description

Hey HN,

I've been following Google's A2A protocol since it launched and noticed that there is still no good way to find agents out on the public internet. They're scattered across GitHub repos, registries, cloud deployments, random subdomains, and many go offline without anyone noticing.

So I built Waggle, which is a search engine that crawls the web for any domain that exposes a valid agent card, indexes them with semantic embeddings, and tracks their health over time. Waggle's index is exposed in a few different ways. First, there is good old search. There is also a REST API for programmatic access. But the feature I'm most excited about is Waggle's A2A-compliant meta-agent that knows how to delegate tasks to other agents. You ask Waggle "What are the GPS coordinates of the Empire State Building", it queries the database, finds a geocoding agent, and hands off your task, then gets back to you when the other agent is done.

The ecosystem is still very young and a lot of agents my crawlers dredge up are still "hello world" demos that are neither useful nor properly implemented. But I'm happy to report that over the course of one month, I went from 8 indexed agents to over 100, with about half being online at any given time. You can try out the Waggle agent / task delegation by using the chat feature (no registration required).

Some known-good agents you can take for a spin: - Cliff the Surveyor (geocoding, earthquake / flood analysis in the US) - Dispute_Email_Agent (functions as advertised) - OpSpawn AI Agent (Tries to do many things, I only had luck with converting markdown to HTML)

In any case, excited to share! Happy to answer questions.