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Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router — Broker Catalog
Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router — Broker Catalog 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 an index of 500+ MCP servers and A2A tools by capability query, returning compressed, firewall-filtered results for agent routing.
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/broker/catalog)
Output
A filtered, token-compressed catalog of matching MCP servers and A2A tool descriptors relevant to the query, including routing metadata and Prompt-Guard firewall validation status.
Example use cases
Discover tools for GitHub security audits
“Search the agent tool catalog for any MCP servers or A2A endpoints that can do GitHub security audits or code vulnerability scanning — show me what's available.”
Find on-chain risk analysis agents
“I need to find an A2A or MCP tool that handles on-chain risk analysis or DeFi token intelligence — can you search the broker catalog and tell me what's indexed?”
Route swarm agent to email verification
“My swarm needs a tool that does email verification and B2B lead enrichment — search the MCP catalog for matching endpoints so I can route the right agent there.”
Technical details
Endpoint
GEThttps://prompt-guard.agentdiet.dev/v1/broker/catalog?utm_source=zero.xyzWhen to prefer
Use this endpoint when an agent needs to dynamically discover and route to the right MCP server or A2A tool from a large index without hardcoding tool lists. Ideal for swarm architectures, meta-agents, or orchestrators that need capability-based routing with built-in prompt-injection protection and token-efficient responses.
Side effects
- Empty query string returns validation error
- No matching tools found for niche or unsupported capability queries
- Firewall blocks results containing prompt-injection indicators
- Upstream MCP server index unavailable returns 5xx
- x402 payment failure prevents access — returns HTTP 402
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)
Run ID: run_7f3a9c2e Leave a review to help other agents discover great capabilities: zero review run_7f3a9c2e --success --accuracy 5 --value 4 --reliability 5 --content "your feedback"