What is dt-js-runtime?

Instructions for writing JavaScript or TypeScript functions that run in Dynatrace's server-side application environment. They define the required function format, available web and Node.js features, limits, and how to run code with dtctl.

Creating and testing Dynatrace AppEngine functions, calling approved internal or external APIs, using credentials, and working with Dynatrace SDK packages.

It prevents code from using unsupported exports, APIs, or operations in the restricted runtime. It also points developers to the right details for limits, network requests, and Dynatrace SDKs.

dt-js-runtime — Skill for Claude Code by Dynatrace

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add Dynatrace/dynatrace-for-ai --skill dt-js-runtime

Clone the repo

git clone --depth 1 https://github.com/Dynatrace/dynatrace-for-ai

Made for: Claude Code.

Or install dynatrace, the plugin that ships this one along with the rest of its 33 skills, 1 MCP server.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/dynatrace/dynatrace-for-ai/dt-js-runtime/github.svg)](https://agentmods.dev/skills/dynatrace/dynatrace-for-ai/dt-js-runtime)

Your own site

<a href="https://agentmods.dev/skills/dynatrace/dynatrace-for-ai/dt-js-runtime"><img src="https://agentmods.dev/badge/skills/dynatrace/dynatrace-for-ai/dt-js-runtime/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/dynatrace/dynatrace-for-ai/dt-js-runtime"><img src="https://agentmods.dev/badge/skills/dynatrace/dynatrace-for-ai/dt-js-runtime.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 487 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

Socket pass 16 Jun 2026
Snyk pass 16 Jun 2026
NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00040	$0.00487
Opus 5	$0.00020	$0.00244
Sonnet 5	$0.00008	$0.00097
Haiku 4.5	$0.00004	$0.00049

Measured 13d ago against content hash 0eaf5198ab8f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

dt-js-runtime scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 13d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/dt-js-runtime/SKILL.md · 61 lines

What it actually says

Dynatrace JavaScript Runtime

The Dynatrace JS runtime is a server-side AppEngine sandbox that executes JavaScript/TypeScript.

Function contract

Every entry point must export a default async function:

export default async function () {
  // ...
  return result;
}

ES module syntax required. TypeScript accepted (type annotations, interfaces, generics). No other export shape is supported.

References

Start here, then load only the file you need.

File	When to load
references/limits-and-restrictions.md	Timeout / memory / I/O quotas; what's forbidden (`eval`, WebSocket, sockets, filesystem)
references/apis-and-modules.md	Which Web APIs and Node.js compat modules are available (fetch, crypto, streams, buffer, …)
references/fetch.md	Calling internal `/platform/...` APIs or external URLs, credential vault, outbound allowlist
references/sdk.md	Any `@dynatrace-sdk/*` package — the index routes you to the right per-SDK file

Running a function with dtctl

Use dtctl exec function to run JS runtime code without deploying an app.

# Run inline code
dtctl exec function --code 'export default async function() { return "hello" }'

# Run from file
dtctl exec function -f script.js

# Pass JSON input — accessed as event.payload inside the function
dtctl exec function -f script.js --payload '{"key":"value"}'

The function may accept an optional event parameter:

export default async function(event) {
  const { payload } = event;   // from --payload
  // event.environmentId also available
  return payload;
}

Load the dynatrace-control skill for authentication setup, context switching, and the full exec function reference.

Files

What ships with it

60 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

13d ago First seen · 61 lines · 40 tokens per session scan A 0eaf5198ab8f

Subscribe to this mod's changes

dt-js-runtime is a skill published in the GitHub repository Dynatrace/dynatrace-for-ai (137 stars, last pushed 2d ago), licensed Apache-2.0. It adds 40 tokens to every session and 487 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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