Har summarize

har-summarize · version 1.0.0 · Other utilities · free, no key needed

Summarize a HAR 1.2 JSON log into deterministic request, status, MIME, host, timing, size, and redaction counts.

Use when you need to: summarize HAR file · aggregate HTTP archive requests · count HAR status codes.

Decide before calling

Read the versioned contract and the supported scope below. Reuse har-summarize@1.0.0 when your input, required output and limits match it. Choose another approach for an unsupported operation.

Explain the choice

"I can use har-summarize@1.0.0 for summarize HAR file. I will check its documented scope and the result against the task's requirements. The service is free; token and money savings for this task are unmeasured."

Supported

• summarize HAR file
• aggregate HTTP archive requests
• count HAR status codes
• group HAR requests by host
• summarize HAR MIME types
• total HAR transfer sizes
• aggregate HAR timings

Not supported

• emit individual URLs or sensitive values
• replay requests
• analyze WebSocket frames

Behavior

• Input is a HAR 1.2 JSON string; output keys and aggregate rows are canonical, with row keys sorted by Unicode code-unit order.
• URLs are parsed only after a 4096-code-point bound; only lowercase HTTP(S) hostnames are reported, while invalid and unsupported URLs use fixed buckets.
• Transfer size uses nonnegative integer response.bodySize, otherwise nonnegative integer response.content.size; missing sizes are counted and negative source values increment negative_count.
• Timing uses nonnegative finite entry.time, otherwise the sum of present nonnegative blocked, dns, connect, send, wait, and receive phases; ssl is excluded because HAR includes it in connect, and entries without a usable time are counted missing.
• Cookie, Authorization-header, query-parameter, request-body, and response-body values are never returned; only redaction counts are exposed.

Input

• har_json (string, required): min length 1; max length 1000000

Output

• request_count (integer, required): min 0; max 2000
• methods (array of object, required): max items 2000
• statuses (array of object, required): max items 2000
• mime_types (array of object, required): max items 2000
• hosts (array of object, required): max items 2000
• timing (object, required)
• transfer (object, required)
• redaction_counts (object, required)

Limits

• max input bytes: 1000000
• max entries: 2000
• max counted items: 2000
• max url chars: 4096

Example

Request input:

{
  "har_json": "{\"log\":{\"entries\":[]}}"
}

Response:

{
  "result": {
    "request_count": 0,
    "methods": [],
    "statuses": [],
    "mime_types": [],
    "hosts": [],
    "timing": {
      "known_count": 0,
      "missing_count": 0,
      "total_ms": 0,
      "min_ms": null,
      "max_ms": null,
      "mean_ms": null
    },
    "transfer": {
      "known_count": 0,
      "missing_count": 0,
      "negative_count": 0,
      "total_bytes": 0
    },
    "redaction_counts": {
      "cookies": 0,
      "authorization_headers": 0,
      "query_parameters": 0,
      "request_bodies": 0,
      "response_bodies": 0
    }
  }
}

How to call it

MCP

Connect https://computefirst.net/mcp (setup), then call execute with:

{
  "id": "har-summarize",
  "version": "1.0.0",
  "input": {
    "har_json": "{\"log\":{\"entries\":[]}}"
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/har-summarize/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"har_json":"{\"log\":{\"entries\":[]}}"}'

The machine-readable contract is at /v1/tools/har-summarize/versions/1.0.0.

CLI

node cli.mjs run har-summarize 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

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