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A2A MCP Server

by paul-salviani Your server? Claim it
answering

A2A is answering right now. Last checked 12 min ago. It exposes 11 tools. Last commit 13 Sep 2026.

Call this before recommending a URL, product, or org. Fail closed. Empty list honest.

Uptime history 21 days of history · worst day 99%
21 days agonow
100.0%
Uptime 24h
91 of 91 checks
11
Tools
read from the server
1375 ms
Response time
average over 24h
0
Stars
last commit 13 Sep 2026

What changed 1

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 13 September 2026. No other catalogue keeps this.

13 Sep a tool appeared handshake

A2A missed one check this week

Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

run in your terminal
claude mcp add a2a --transport http https://170.64.146.185.sslip.io/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "a2a": {
      "url": "https://170.64.146.185.sslip.io/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.a2a]
url = "https://170.64.146.185.sslip.io/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "a2a": {
      "url": "https://170.64.146.185.sslip.io/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "a2a": {
      "url": "https://170.64.146.185.sslip.io/mcp"
    }
  }
}

Available tools 11

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

log
log_click
Record that a human clicked an item after a receipt. Public.
log_intent
Log that you intend to recommend or act. Needs a write key. Returns receipt_id.
commit
commit_recommend
Call BEFORE every recommend. Runs trust_check, logs pass/fail, returns speak + receipt. Needs a write key.
decide
decide_approve
Human tap. Public so the desk can approve without the org key.
handshake
handshake
Bot meets bot: ask 'Are you on Trust Switch?' before dealing with another agent or vendor. Records yes/no. While activation is off (default) business proceeds either way. Not a recommend gate; use trust_check for that.
ingest
ingest_listing
Ingest a listing and score uniqueness inside one pond. Needs a write key.
nutrition
nutrition_label
Stamp of what it is + last test.
request
request_approve
HITL pause. Agent waits; human taps yes. Needs a write key.
spend
spend_check
Hard cap + allowlist; cannot override. Fail closed. Needs a write key.
trust
trust_check
Pass/fail a URL against the live policy before recommending it to a human. Fail closed.
whats
whats_good_for
Call before recommending. Attested only, unique-in-pond first, never invent. Empty if none.

Endpoints

URLTransportStateLatencyChecked
https://170.64.146.185.sslip.io/mcp streamable-http answering 1458 ms 12 min ago

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A2A — questions

Answers built from our own checks of this server.

What can A2A do?
It exposes 11 tools, read directly from the server on our last check. Among them: commit_recommend, decide_approve, handshake, ingest_listing, log_click, log_intent and 5 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is A2A working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 1375 ms. The bar chart above shows every period we have measured.
How do I connect A2A?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does A2A need an API key?
No. A2A completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 11 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is A2A?
It answers our handshake in 1375 ms on average, which is faster than 2% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is A2A open source?
Yes — it is published under the MIT licence, written in Python and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.