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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 preflight.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 compressed, firewall-screened results for agent routing and discovery
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://preflight.agentdiet.dev/v1/tool-search)
Output
Returns a list of matching MCP servers or A2A tools relevant to the query, with compressed capability descriptions (85% token reduction), safety screening via the Prompt-Guard firewall, and routing metadata to help an agent select and connect to the best tool.
Example use cases
Discover tools for on-chain risk analysis
“Search the tool index for anything that handles on-chain risk or smart contract auditing — I need to find an MCP server my agent can call when it encounters a suspicious token address.”
Find compression tools for a large agent context
“Look up available MCP tools for context compression — my agent is hitting token limits and I need a tool that can shrink payloads before they go into the prompt.”
Verify a specific endpoint before routing
“Check whether this endpoint URL is indexed and safe to route agent traffic to: https://some-mcp-server.example.com/v1/tool — I want to make sure it passes the prompt-injection firewall before I add it to my swarm.”
Technical details
Endpoint
GEThttps://preflight.agentdiet.dev/v1/tool-search?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs to dynamically discover which MCP server or A2A tool to call for a given capability, especially in swarm or multi-agent architectures where the tool landscape is large and frequently changing. It is preferable over hardcoded tool registries because it indexes 500+ servers, applies prompt-injection safety screening, and compresses results to minimize token overhead. Use it to verify whether a specific endpoint URL is safe and indexed before routing live agent traffic.
Side effects
- Empty query string returns a 400 validation error
- Query matches no indexed tools, returning an empty result set
- Endpoint URL verification fails if the URL is not in the index
- Rate limiting or payment failure (402) if x402 micropayment is not completed
- Ambiguous queries may return loosely relevant or low-confidence matches
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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