# 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, $0.005/call, status unknown (last checked 2026-09-14).

## Facts

- Endpoint: POST https://x402.agentutility.ai/hash-string
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/hash-string-17484d27
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_r1KDuuf40uoUTeuAzmF4C

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 hash-string-17484d27 -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
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "required": [
      "text"
     ],
     "properties": {
      "text": {
       "type": "string",
       "description": "Source text to hash. UTF-8 encoded internally. Max 200,000 chars."
      },
      "algorithms": {
       "type": "array",
       "description": "Which algorithms to compute. Subset of: sha1, sha256, sha384, sha512, md5. Default ['sha256']."
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "digests": {
       "type": "object",
       "properties": {
        "md5": {
         "type": "object",
         "properties": {
          "hex": {
           "type": "string"
          },
          "bytes": {
           "type": "integer"
          },
          "base64": {
           "type": "string"
          },
          "base64url": {
           "type": "string"
          }
         }
        },
        "sha256": {
         "type": "object",
         "properties": {
          "hex": {
           "type": "string"
          },
          "bytes": {
           "type": "integer"
          },
          "base64": {
           "type": "string"
          },
          "base64url": {
           "type": "string"
          }
         }
        }
       }
      },
      "algorithms": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "input_bytes": {
       "type": "integer"
      },
      "input_chars": {
       "type": "integer"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "digests": {
   "md5": {
    "hex": "d41d8c...",
    "bytes": 16,
    "base64": "1B2M...",
    "base64url": "1B2M..."
   },
   "sha256": {
    "hex": "a1b2c3...",
    "bytes": 32,
    "base64": "obLD...",
    "base64url": "obLD..."
   }
  },
  "algorithms": [
   "sha256",
   "md5"
  ],
  "input_bytes": 15,
  "input_chars": 15
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/hash-string-17484d27/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)