# AgentDiet MCP Gateway Discovery Manifest

> AgentDiet MCP Gateway Discovery Manifest 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).

Returns a discovery manifest listing available MCP servers, x402 APIs, and A2A agents accessible through the AgentDiet broker gateway.

## Facts

- Endpoint: GET https://mcp-gateway.agentdiet.dev/v1/discovery-manifest?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-discovery-manifest-dc58d627
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ATRj4hpYXMA0Q1hulGtyq

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-discovery-manifest-dc58d627
```

Example prompt: Pull up the discovery manifest from the AgentDiet MCP gateway so I can see the full list of MCP servers, x402 APIs, and A2A agents available to route through.

## When to prefer this

Use this endpoint when an AI agent needs to dynamically discover the full catalog of available MCP servers, x402 APIs, and A2A agents accessible through the AgentDiet broker before routing tasks. Prefer this over hard-coding tool lists or manually managing service registries. Ideal for bootstrapping agent workflows, building dynamic tool selectors, or verifying what capabilities are live on the gateway at a given moment.

## Known failure modes

- Payment required (HTTP 402) if USDC payment on Base is not included or is insufficient
- Malformed input schema (missing required 'type' or 'method' fields) returns a validation error
- Gateway unreachable or timeout if the upstream broker is down
- Empty or partial manifest if no MCP servers are currently registered
- Invalid query URL parameter format may result in unexpected routing behavior

## 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

A JSON object with a 'data' field containing the discovery manifest (listing available MCP servers, x402 APIs, and A2A agents), a 'status' field (e.g. 'ok'), and an 'roi_proof' object that includes a compression_ratio_pct metric (e.g. 91.4%) indicating how efficiently the manifest is compressed relative to raw data.

## 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": {
      "url": {
       "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-discovery-manifest-dc58d627/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)