# agentutility — paid x402 endpoints for autonomous agents

> agentutility — paid x402 endpoints for autonomous agents is a paid API for AI agents from x402.agentutility.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

## Facts

- Endpoint: POST https://x402.agentutility.ai/model-route-recommend
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/model-route-recommend-c8b5d6d9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_H5MzegvIHvAx8zUoPX0MS

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 model-route-recommend-c8b5d6d9 -d '<json body>'
```

## How this service works

Paid x402 endpoints organized into product clusters. USDC-settled on Base. MCP-callable. ERC-8004 identity registry agentId 47167.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "POST"
     ]
    },
    "bodyType": {
     "type": "string",
     "enum": [
      "json",
      "form-data",
      "text"
     ]
    },
    "body": {
     "properties": {
      "task": {
       "type": "string",
       "description": "Plain-language description of the task the model needs to perform, e.g. 'classify inbound support tickets in real time'. Required, max 2,000 chars."
      },
      "constraints": {
       "type": "object",
       "description": "Optional constraints object with any of: latency (string), budget (string), context_length (string), modality (string). Each field max 200 chars."
      }
     },
     "required": [
      "task"
     ]
    }
   },
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "task": {
       "type": "string"
      },
      "constraints": {
       "type": "object",
       "properties": {
        "latency": {
         "type": "string"
        },
        "budget": {
         "type": "string"
        }
       }
      },
      "recommendation": {
       "type": "object",
       "properties": {
        "recommended_tier": {
         "type": "string"
        },
        "candidate_models": {
         "type": "array",
         "items": {
          "type": "string"
         }
        },
        "reasoning": {
         "type": "string"
        },
        "tradeoffs": {
         "type": "array",
         "items": {
          "type": "string"
         }
        },
        "fallback_tier": {
         "type": "string"
        },
        "caveats": {
         "type": "array",
         "items": {
          "type": "string"
         }
        }
       }
      },
      "heuristic": {
       "type": "boolean"
      },
      "model": {
       "type": "string"
      },
      "source": {
       "type": "string"
      }
     }
    }
   },
   "required": [
    "type"
   ]
  }
 },
 "required": [
  "input"
 ]
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "task": "classify inbound support tickets into 5 categories in real time",
  "model": "hermes-3-llama-3.1-405b",
  "source": "morpheus",
  "heuristic": true,
  "constraints": {
   "budget": "low",
   "latency": "under 500ms"
  },
  "recommendation": {
   "caveats": [
    "model names and pricing here are a general guide, not a live feed; verify current pricing before committing"
   ],
   "reasoning": "The task is short-form classification with a tight latency budget; a small-tier model is fast and cheap enough.",
   "tradeoffs": [
    "may miss nuance a larger model would catch on ambiguous inputs"
   ],
   "fallback_tier": "nano",
   "candidate_models": [
    "gpt-4o-mini",
    "claude-haiku-4.5",
    "gemini-2.5-flash"
   ],
   "recommended_tier": "small"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/model-route-recommend-c8b5d6d9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.agentutility.ai](https://www.zero.xyz/host/x402.agentutility.ai/llms.txt)