notte-functions-build

notte-functions-build is a skill for Claude Code, Codex from nottelabs/notte-skills. It costs 138 tokens per session (3,306 once invoked), scanned A, original, MIT.

A guide for turning a one-time website exploration into a reusable Notte Function: a callable web endpoint that accepts inputs and can be scheduled or run repeatedly.

In plain words
What is it for?
Use it to build reusable scrapers or browser automations, test them, publish them, and run them across many inputs or on a schedule.
Why use it?
It avoids exploring the same site from scratch for every request and gives repeated browser tasks a stable callable form.

Skill for Claude CodeCodex

Written for Claude Code and Codex: allowed-tools in frontmatter, but also agents/openai.yaml present.

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is **Relationship to `notte-browser`.** This skill builds on the base CLI documented in the [notte-browser skill](../notte-browser/SKILL.md). Load that skill for t.

Part of the notte plugin — 3 skills, 2 MCP servers shipped together

Good fit Use it to build reusable scrapers or browser automations, test them, publish them, and run them across many inputs or on a schedule.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/nottelabs/notte-skills
agentmods
npx agentmods add skills/nottelabs/notte-skills/notte-functions-build

Made for: Claude Code, Codex.

Or install notte, the plugin that ships this one along with the rest of its 3 skills, 2 MCP servers.

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.

agentmods badge for notte-functions-build

README.md
[![agentmods](https://agentmods.dev/badge/skills/nottelabs/notte-skills/notte-functions-build/github.svg)](https://agentmods.dev/skills/nottelabs/notte-skills/notte-functions-build)
Your own site
<a href="https://agentmods.dev/skills/nottelabs/notte-skills/notte-functions-build"><img src="https://agentmods.dev/badge/skills/nottelabs/notte-skills/notte-functions-build/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.

agentmods 80×15 button for notte-functions-build

Your own site · 80×15
<a href="https://agentmods.dev/skills/nottelabs/notte-skills/notte-functions-build"><img src="https://agentmods.dev/badge/skills/nottelabs/notte-skills/notte-functions-build.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 138 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,306 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Data Exfiltration · line 197
    Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.
    Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
  • medium Data Exfiltration · line 197
    Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.
    Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00138 $0.03306
Opus 5 $0.00069 $0.01653
Sonnet 5 $0.00028 $0.00661
Haiku 4.5 $0.00014 $0.00331

Measured 11d ago against content hash daa1e3a3f3db, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

notte-functions-build scanned grade A with 1 finding 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 11d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (templates/function-skeleton.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

allowed-tools: Bash(notte:*), Bash(curl:*), Bash(jq:*), Read, Write, Edit
plugins/notte/skills/notte-functions-build/SKILL.md · 234 lines

How it starts

The opening of the file, as written. The whole thing — 234 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Notte Functions Build

Turn a one-off browser task into a deployed, reusable Notte Function. The expensive, non-deterministic part - an agent exploring a site to find where the data actually lives - happens once. The result is a parameterized Function with a stable Function ID that anyone can invoke over HTTP, run from the CLI/SDK, or schedule on a cron. Running 5,000 records later costs nothing extra in exploration.

This is the difference between asking an agent to "scrape Indeed" every time (pay exploration cost and eat non-determinism on every call) and building an indeed-jobs Function once, then calling it with {"keyword": "...", "location": "..."} forever.

Relationship to notte-browser. This skill builds on the base CLI documented in the notte-browser skill. Load that skill for the full command reference, authentication handling, and security notes. This skill adds the explore-once -> generate -> self-test -> publish pipeline on top of it.

When to use this skill vs. notte-browser

  • One-off task ("scrape this page now") -> use notte-browser directly.
  • Reusable artifact ("I'll run this across many inputs / on a schedule / from my backend") -> use this skill to build a Function.
  • A built Function broke (site changed, returns empty) -> use notte-functions-doctor.

The pipeline

Phase 0  Setup          ensure the notte CLI is authenticated
Phase 1  Describe       parse intent, check the marketplace, confirm a plan          [GATE]
Phase 2  Explore        drive the site ONCE; find the stable path (API-first)
Phase 3  Generate       export workflow-code; parameterize; stamp a health contract
Phase 4  Publish+Test   create the Function; self-test until green; self-repair
Delivery                report Function ID + HTTP snippet + coverage; schedule      [GATE]

Phases 2 and 3 may loop per capability when a task spans several stages (search page + detail page, for example). Finish one stable capability before starting the next.

Read the full file on GitHub · 234 lines

Files

What ships with it

5 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.

  1. 11d ago First seen · 234 lines · 138 tokens per session scan A daa1e3a3f3db

Subscribe to this mod's changes

notte-functions-build is a skill published in the GitHub repository nottelabs/notte-skills (11 stars, last pushed 6d ago), licensed MIT. It adds 138 tokens to every session and 3,306 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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