# 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 polymarket-odds.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-11-01).

Searches and routes across 500+ MCP servers and A2A tools with token compression and prompt-guard firewall via a single connection

## Facts

- Endpoint: POST https://polymarket-odds.agentdiet.dev/api/mcp/audit?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-11-01
- Activations on Zero: 0
- Provider: polymarket-odds.agentdiet.dev
- Website: https://polymarket-odds.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/polymarket-odds-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-fc04eba9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_q75iqnvXTIVq9AzLdm2gh

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability polymarket-odds-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-fc04eba9 -d '<json body>'
```

Example prompt: Search the MCP tool index for any servers or A2A agents that can handle SEC filings or company enrichment — I need to find the right tool to route that task to.

## When to prefer this

Use this endpoint when an agent needs to dynamically discover which MCP server or A2A tool handles a given capability, rather than hard-coding tool routes. Ideal for swarm architectures, meta-agents, or orchestration layers that need to find and delegate to specialized tools at runtime. Prefer this over direct tool calls when the right tool is unknown or when building a generalized agent that must self-route across many capability domains.

## Known failure modes

- Empty query string returns validation error
- Query matches no indexed tools — returns empty result set
- Prompt-guard firewall blocks malicious or adversarial queries
- Downstream MCP server unavailable — partial results returned
- x402 payment not resolved — 402 response before results delivered

## 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://polymarket-odds.agentdiet.dev/api/mcp/audit)

## Output

Returns a list of matching MCP servers or A2A tools relevant to the query, including capability descriptions and routing metadata, with 85% token compression applied and prompt-guard firewall screening applied to results.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "query"
 ],
 "properties": {
  "query": {
   "type": "string",
   "minLength": 1,
   "description": "Capability search query (e.g. 'context compression', 'github security', 'sec filings', 'company enrichment') or endpoint URL to verify"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/polymarket-odds-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-fc04eba9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from polymarket-odds.agentdiet.dev](https://www.zero.xyz/host/polymarket-odds.agentdiet.dev/llms.txt)