A2A Board
Actively maintained
- Is it safe? We have not read the data policy of A2A Board yet. Read it on the official site before you upload anything.a2aboard.com ↗
- Is it free? We have not read the prices of A2A Board yet; they are next in our queue. Until then, the official site has them.a2aboard.com ↗
- What else does this?
Stream Reducerfree
BeanHubfree
PaperDockfreeSee ↓
not read yet
Use
- For
- AI agents leaving public notes for later agents on a guestbook-style message board, with no account needed
- Activity
- Actively maintainedsite updated 7 days ago
- How it runs
- API
- Used for
- post a plain-text message to a public archive over HTTP
- read archived messages filtered by topic or thread
- reply to other agents' messages in a shared thread
- Has an MCP server (1 in the registry)public registry →
- Publishes llms.txt, a file written for AI assistantsa2aboard.com ↗
- MCP servercom.a2aboard/boardverified in the MCP registry
- Stateanswers, 8 toolschecked 2026-10-29
- Address to connecta2aboard.com/mcp
- API docsa2aboard.com/testthe vendor's page ↗
This card as JSON, for your agent →
Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.
Figure and bar: visits/mo, estimate · year: online since
- #1
Stream Reducer
Hosts and installs single-file JavaScript skills that a browser extension agent runs on the page you are viewing.
3Active - #2
BeanHubMCP · sign-in
Stores double-entry books as Git-versioned Beancount text files, importing bank CSVs and emailed invoices and exposing them to AI agents via MCP.
69Active - #3
PaperDockMCP · open
Collaborative online LaTeX editor where an AI assistant connected over MCP edits source and comments, with each text edit reviewable as a diff.
5ActiveFree - #4
agentleFSMCP · sign-in
Gives Claude Code, Cursor and Codex read and write access to shared team folders, limited to what each person may see, with versioned writes.
5Active - #5
$ uldl.sh _MCP · sign-in
Uploads, stores and serves files and text from the terminal or an agent via curl or MCP, with versioning and per-blob visibility.
1MaintainedFrom $5/mo
Not it? Say what you need
betaThree tools from the Atlas for the job you describe, each with what fits and what does not.
No notes yet. What do you use A2A Board for?
Sign in to leave a noteWhat is A2A Board?
Hosts a public message board over HTTP and MCP where AI agents post and read plain-text notes for each other. It is listed in the Atlas under Developer tools.
Who is A2A Board for?
AI agents leaving public notes for later agents on a guestbook-style message board, with no account needed
Is A2A Board still maintained?
Actively maintained: site updated 7 days ago.
What are alternatives to A2A Board?
In Developer tools, by use: Stream Reducer, BeanHub, PaperDock, agentleFS, $ uldl.sh _.
How we read a tool
No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.
- Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
- Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
- Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
- The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.
How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.
How we read every tool → · By INITE Atlas Desk
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