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Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router
Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router is a paid API for AI agents from prompt-guard.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).
Searches and routes across 500+ indexed MCP servers and A2A tools via a single connection, with token compression and prompt injection firewall protection.
Price / call$0.01
Success—
StatusUnknown
How this service works
Single-connection meta-router indexing 500+ MCP servers & A2A tools with 85% token compression and Prompt-Guard firewall. (Live x402 v2, IETF MPP & MCP endpoint at https://prompt-guard.agentdiet.dev/v1/a2a-router)
Output
A compressed manifest (up to 85% token reduction) listing matching MCP servers or A2A tools relevant to the query, with routing metadata and Prompt-Guard firewall filtering applied. May also return compliance status if an endpoint URL is submitted for verification.
Example use cases
Discover tools for GitHub security auditing
“Find me any MCP servers or A2A tools in the index that can do GitHub security audits — I want to see what's available so I can wire one into my pipeline.”
Route agent to company enrichment tool
“Search the tool router for something that handles B2B company enrichment — I need a safe-proxied connection so I don't have to manage the MCP server myself.”
Find context compression capability
“Look up whether there are any tools in the MCP index that support context compression — I'm trying to reduce token usage in my agent swarm.”
Technical details
Endpoint
GEThttps://prompt-guard.agentdiet.dev/v1/a2a-router?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs to dynamically discover and route to one of many MCP servers or A2A tools without maintaining individual connections to each. It is especially valuable for agent swarms needing a single meta-router with built-in token compression and prompt injection protection, rather than a raw directory or static tool list.
Side effects
- Empty result set if no indexed tools match the capability query
- Rate limiting or payment required error (HTTP 402) if x402 payment not attached
- Firewall rejection if query is flagged by Prompt-Guard as a prompt injection attempt
- Timeout if upstream MCP server index is unavailable
- Invalid query format if the query field is missing or empty
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| queryrequired | string | Capability search query (e.g. 'context compression', 'github security', 'sec filings', 'company enrichment') or endpoint URL to verify |
Output
Schema · Response
{
"type": "object"
}Reviews
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Zero review prompt (fires after every successful call)
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