# Har Viewer — MCP tool `findutils:har_viewer`

Parse HAR 1.x JSON and return each entry’s method, URL, status, size, time, and MIME type. Request bodies, cookies, and headers are omitted. Convert a HAR to curl with har_to_curl.

- Category: network
- MCP server: https://mcp.findutils.com/ (Streamable HTTP, no API keys, 120 req/min per IP)
- REST endpoint: POST https://api.findutils.com/api/tools/har-viewer/execute (no API keys, 60 req/min per IP)
- Reference page: https://findutils.com/mcp/har-viewer/
- Same tool on the other surface: https://findutils.com/api/har-viewer/

## Connect

```bash
claude mcp add findutils --transport http https://mcp.findutils.com/
```

Claude Desktop (`claude_desktop_config.json`):

```json
{
  "mcpServers": {
    "findutils": {
      "url": "https://mcp.findutils.com/"
    }
  }
}
```

## Call the tool (verified example)

```bash
curl -X POST https://mcp.findutils.com/ \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "har_viewer",
      "arguments": {
        "har": "{\"log\":{\"version\":\"1.2\",\"entries\":[{\"time\":12,\"request\":{\"method\":\"GET\",\"url\":\"https://example.com/\"},\"response\":{\"status\":200,\"statusText\":\"OK\",\"content\":{\"size\":10,\"mimeType\":\"text/plain\"}}}]}}"
      }
    }
  }'
```

## Input schema

| Argument | Type | Required | Description |
|---|---|---|---|
| `har` | string | yes | HAR 1.x JSON text (DevTools export with log.entries). |

Example arguments (verified):

```json
{
  "har": "{\"log\":{\"version\":\"1.2\",\"entries\":[{\"time\":12,\"request\":{\"method\":\"GET\",\"url\":\"https://example.com/\"},\"response\":{\"status\":200,\"statusText\":\"OK\",\"content\":{\"size\":10,\"mimeType\":\"text/plain\"}}}]}}"
}
```

Decoded `har` argument (readability only — send it as a string):

```json
{
  "log": {
    "version": "1.2",
    "entries": [
      {
        "time": 12,
        "request": {
          "method": "GET",
          "url": "https://example.com/"
        },
        "response": {
          "status": 200,
          "statusText": "OK",
          "content": {
            "size": 10,
            "mimeType": "text/plain"
          }
        }
      }
    ]
  }
}
```

## Also a REST endpoint

```bash
curl -X POST https://api.findutils.com/api/tools/har-viewer/execute \
  -H "Content-Type: application/json" \
  -d '{
    "har": "{\"log\":{\"version\":\"1.2\",\"entries\":[{\"time\":12,\"request\":{\"method\":\"GET\",\"url\":\"https://example.com/\"},\"response\":{\"status\":200,\"statusText\":\"OK\",\"content\":{\"size\":10,\"mimeType\":\"text/plain\"}}}]}}"
  }'

# Parameter schema
curl https://api.findutils.com/api/tools/har-viewer
```

Full REST reference: https://findutils.com/api/har-viewer/ · OpenAPI 3.1 spec: https://findutils.com/api/openapi.json

---
Full catalog: POST https://mcp.findutils.com/ with method `tools/list` · https://findutils.com/mcp/ · https://findutils.com/llms.txt