# 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 an index of 500+ MCP servers and A2A tools by capability query, returning compressed, prompt-safe matching endpoints via a single meta-router connection.

## Facts

- Endpoint: GET https://polymarket-odds.agentdiet.dev/v1/mesh/dispatch?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-e66670c1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bYd0jLKoUOomz74PMLd30

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-e66670c1
```

Example prompt: Search the MCP mesh for tools that can do SEC filings retrieval — I need to find which available agent endpoints support that capability.

## When to prefer this

Choose this endpoint when an agent needs to dynamically discover which MCP servers or A2A tools support a given capability at runtime, rather than hardcoding tool references. Especially useful for swarm architectures needing a single connection point to a large tool ecosystem, or when token budget is constrained and 85% compression of tool metadata is valuable. Also suitable for verifying whether a specific remote agent endpoint is live and compliant before routing traffic to it.

## Known failure modes

- Empty or vague query string returns no matches or overly broad results
- Queried endpoint URL is unreachable or non-compliant, returning an error status
- Rate limiting or payment failure (HTTP 402) if x402 micropayment is not properly handled
- Index may be stale if recently added MCP servers have not yet been crawled
- Ambiguous capability terms may return loosely related tools rather than exact matches

## 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/mesh/dispatch)

## Output

Returns a structured object listing matching MCP servers or A2A tool endpoints relevant to the capability query, with token-compressed metadata and Prompt-Guard firewall filtering applied. When given a URL, returns verification status and compliance signals for that endpoint.

## 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-e66670c1/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)