# AgentDiet MCP Gateway A2A Mesh Broker

> AgentDiet MCP Gateway A2A Mesh Broker is a paid API for AI agents from mcp-gateway.agentdiet.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).

Routes agent queries across 31,390+ MCP servers, x402 APIs, and A2A agents, returning deduplicated intelligence with USDC micropayment settlement on Base.

## Facts

- Endpoint: GET https://mcp-gateway.agentdiet.dev/v1/a2a-mesh?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentdiet-mcp-gateway-a2a-mesh-broker-d41ad50a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Z9rZuhuRJ7vDufsvSoWqw

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 agentdiet-mcp-gateway-a2a-mesh-broker-d41ad50a
```

Example prompt: Search the MCP agent mesh for tools that can summarize web pages, and return the best result — I want to see what's available across all connected MCP servers.

## When to prefer this

Choose this endpoint when you need to fan out a query across a large ecosystem of MCP servers, x402 APIs, or A2A agents without knowing which specific service to call. It is ideal for discovery-plus-execution workflows where the agent doesn't have a predetermined tool and wants the mesh to route to the best available capability. Prefer this over direct API calls when you want aggregated, deduplicated intelligence from thousands of sources with built-in micropayment handling via USDC on Base.

## Known failure modes

- No matching MCP server or agent found for query — returns empty data object
- Payment settlement failure on Base network — USDC transaction may not confirm
- Invalid input type or method enum — schema validation error
- Query too vague to route deterministically — may return generic or low-relevance results
- Rate limiting or quota exceeded — 402 payment required again or request rejected

## How this service works

Deterministic B2A/A2A/MCP/x402/MPP/L402 execution and intelligence node at https://mcp-gateway.agentdiet.dev settling in USDC on Base.

## Output

Returns a JSON object with a 'data' field containing the aggregated response from matched MCP servers or agents, a 'status' field ('ok' on success), and an 'roi_proof' object including a compression_ratio_pct value indicating how much the response was optimized (e.g. 91.4% compression).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "POST"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "query": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {},
  "status": "ok",
  "roi_proof": {
   "compression_ratio_pct": 91.4
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentdiet-mcp-gateway-a2a-mesh-broker-d41ad50a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-gateway.agentdiet.dev](https://www.zero.xyz/host/mcp-gateway.agentdiet.dev/llms.txt)