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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 x402-audit.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).
Searches an index of 500+ MCP servers and A2A tools by capability query, returning matching endpoints with token-compressed results through a prompt-firewall-protected meta-router.
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://x402-audit.agentdiet.dev/v1/universal-mcp-gateway)
Output
Returns a list of matching MCP servers or A2A tools from a 500+ endpoint index, with capability descriptions compressed by up to 85% for token efficiency, filtered through a Prompt-Guard firewall to block malicious prompt injection. Results include endpoint metadata, connection details, and relevance to the query.
Example use cases
Agent swarm tool discovery
“I'm building a multi-agent swarm and need to find MCP servers that can handle SEC filings lookups and company enrichment — can you search the tool index and give me the top matches?”
Safe capability routing for prompt firewall
“Before I connect my agent to an external MCP tool for on-chain risk analysis, can you route the query through the safe-proxy gateway and tell me what endpoints come back with their token-compressed descriptions?”
Finding context compression tools
“My agent pipeline is hitting token limits — can you search for MCP servers or A2A tools that specialize in context compression or summarization so I can plug one in?”
Technical details
Endpoint
GEThttps://x402-audit.agentdiet.dev/v1/universal-mcp-gateway?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to discover MCP servers or A2A agent tools by capability without manually cataloging hundreds of endpoints. It is especially useful for agent orchestrators, swarm routers, or pipeline builders that need to dynamically resolve which downstream tool handles a given task, and when token budget is a concern due to its 85% compression. Prefer this over manually querying individual MCP registries when breadth of coverage and prompt safety are both priorities.
Side effects
- Empty query string returns validation error
- Query too generic may return low-relevance results across unrelated tools
- Payment not completed (HTTP 402) blocks result delivery
- Prompt-Guard firewall may flag or reject queries containing injection-like patterns
- Index may not reflect newly added MCP servers in real time
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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