# 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 2026-10-21).

Searches across 500+ indexed MCP servers and A2A tools by capability query, returning compressed, firewall-filtered results via a single meta-router endpoint.

## Facts

- Endpoint: GET https://polymarket-odds.agentdiet.dev/v1/a2a-mesh?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- 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-1e27eff3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_F5Y4H7de2M4XAO9jcChpJ

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-1e27eff3
```

Example prompt: Search the A2A and MCP tool index for any servers that handle SEC filings or company enrichment — I need to find a tool my agent can call for that capability.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP servers or A2A tools support a given capability, rather than hardcoding tool URLs. Especially useful when orchestrating multi-agent swarms and needing a single connection point that indexes 500+ tools with safety filtering already applied.

## Known failure modes

- Empty or vague query returns no results or low-relevance matches
- Queried endpoint URL not found in the index returns a not-found or unverified status
- Service returns generic object response with no schema guarantees, making parsing fragile
- Token compression may omit detail needed for full tool evaluation
- Firewall may block legitimate tools flagged as unsafe

## 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/v1/a2a-mesh)

## Output

Returns a compressed list of matching MCP servers or A2A tools relevant to the capability query, or verification status for a supplied endpoint URL, filtered through the Prompt-Guard firewall to remove unsafe or malicious 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-1e27eff3/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)