Carto Basics Agent Skill

Start here for first-time CARTO use. Orients on the two parallel access paths into the CARTO platform — the MCP server (the primary path…

Context cost
5k tokensestimated from the bundle, loaded when it triggers
Bundle
6 files · 20.2 kBtext throughout, nothing executable
Licence
MITthe author’s own terms
Last change
—no release on file
Servers it uses
Noneruns standalone

What it does

Start here for first-time CARTO use. Orients on the two parallel access paths into the CARTO platform — the MCP server (the primary path for inline, in-conversation work in chat hosts, including creating and editing maps and Workflows) and the CLI (for scripting, CI/CD, headless and bulk/cross-org work, and deeper administration and auditing such as usage-log queries) — and which skills cover each. Also covers CLI install, authentication, profiles, JSON output, and async job patterns.

What this skill changes about the agent has not been set out here as a list. Its SKILL.md, shown below, says it in the author’s own words.

data sciencemcp

The skill itself

A skill is instructions the model reads, so you can see what you are getting: below is the start of its SKILL.md. The front matter loads with every session, the body loads when the skill triggers, and the whole file comes with the install.

SKILL.md6.1 kB · preview
--- name: carto-basics license: MIT ---
7# carto-basics
8
9CARTO is reachable through two parallel access paths, and most agent setups use one or both:
10
11- **CARTO MCP Server** — the primary path for inline, in-conversation work in chat-based agent hosts (Claude.ai, Claude Desktop, ChatGPT, and other MCP clients). When attached, it exposes a broad consolidated tool surface: exploring data, creating and editing Builder maps, authoring and running Workflows, running SQL, import/export, and org admin. Renders maps inline on hosts that support MCP Apps, and dynamically registers the user's published Workflows as MCP tools. This covers most interactive requests.
12- **CARTO CLI** (@carto/carto-cli) — the path for scripting, CI/CD, headless contexts, bulk and cross-org operations, deeper administration and auditing (e.g. SQL over usage logs), and the fullest command surface. Used by many platform skills in this catalog, and the fallback whenever the MCP server isn't attached.
13
14**Use this skill before any other CARTO skill** — it covers how to detect and route between the two access paths, plus CLI installation, authentication, profiles, and the global flags the CLI-driven skills assume.
15
16## When to use this skill
17
18- Setting up the CLI for the first time on a new machine.
19- The user reports authentication errors (auth status failures, expired tokens).
20- The user wants to switch between organizations or environments.
21- A downstream skill needs --profile, --json, --token, or --base-url and you don't yet know how those work.
22
23## Preflight — run before any CLI operation
24
25Skills that drive the **CLI** assume a working, authenticated carto CLI. If the attached **MCP server** already covers the request (exploring data, creating maps, running Workflows in a chat host), you don't need the CLI at all — route through MCP. Run the checks below before your first *CLI* call, and **re-run them at the start of each task** — ephemeral sandboxes (e.g. Claude Code Cowork tasks) wipe the CLI between tasks. An attached MCP server, by contrast, persists at the account level (see below).
This is a preview of SKILL.md. Download or install the skill to get the whole thing.
In the file
SKILL.md875 words
Files6
LicenceMIT
Why you can read it

Nothing in a skill executes. The client loads the text and the model follows it, so a skill can be audited the way a runbook is — by reading it.

What it costs in context

Skills are not billed by the call. They are paid for in context: every token the instructions occupy is a token your code, your diff and your conversation cannot use. Here is what this one takes and when it takes it.

≈140
always loaded
The name and description, so the model knows the skill exists and when to reach for it.
4,910
on trigger
The instruction body and 5 supporting files, read only when the skill fires.
2.5%
of a 200k window
Ten skills this size would take about 25% of the window before you open a file.
050k100k150k200k context window

5k tokens, estimated from the bundle at four bytes to the token, held for the rest of the session once it triggers. Heavy. Teams tend to install this one per project rather than globally, and load it only when the job comes up.

Servers bill, skills cost

A server charges by the month. A skill charges once per session, in context, and then keeps charging it for as long as the session lives.

Before and after

The same question, put to the same model twice: once as it comes, and once with these instructions loaded.

No worked example has been published for this skill yet.

The procedure it runs

The procedure has not been set out here step by step. It is in the body of its SKILL.md: the start of it is shown above, and the whole file comes with the install.

Prose, not code

These steps are written for a model to follow, not executed by a runtime. It can still be told to skip one, and it will say so when it does.

Servers it uses

None. This skill calls no MCP servers at all.

Everything it needs is in the instructions, so it works in a project with nothing connected — the model reads the file and changes how it works with what it can already reach.

Its SKILL.md does not declare which tools it asks the agent for, so what it touches is whatever the instructions themselves ask for — read them before you install it.

What it asks for
Writes filesnot declared
Network accessnot declared

This SKILL.md carries no allowed-tools line, so neither is declared. A skill grants no permissions of its own — it can only ask for tools your client already has.

What it will not do

Every skill is narrow, and the useful ones say where they stop. These are the jobs this one is the wrong tool for.

What this skill is not for has not been published here. Nothing is implied by that: it is a section the author has not filled in.

What is in the bundle

6 files, 20.2 kB on disk. A bundle is text throughout: the instructions the model reads, plus the templates it fills in.

  • SKILL.md6.1 kB
  • references/access-paths.md5.7 kB
  • references/authentication.md3.2 kB
  • references/global-options.md2.1 kB
  • references/installation.md1.9 kB
  • references/profiles.md1.2 kB
What is not in it

No dependencies and nothing executable: a skill is text the agent reads, so the bundle is 6 files you can review in full before installing. The MIT licence covers the templates and examples as well as the instructions.

Install

Installing copies the bundle into your project. Nothing runs at install time — the files sit on disk until the model reads them.

# Carto Basics · 5k tokens when loaded · macOS, Linux mkdir -p .claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/carto-basics/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/carto-basics" ] && { [ ! -e .claude/skills/carto-basics ] || { mv .claude/skills/carto-basics "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/carto-basics" .claude/skills/ && echo "Installed .claude/skills/carto-basics"
On Windows, or any OS with Node 20+
npx mcprush@latest skill add cartodb/carto-basics

Windows PowerShell says 'running scripts is disabled on this system'? Run Set-ExecutionPolicy -Scope CurrentUser RemoteSigned once, or type npx.cmd instead of npx (codex.cmd, gemini.cmd, grok.cmd likewise). PowerShell 7 needs neither. Writes to .claude/skills/carto-basics/ in the current project. For every project instead, run mkdir -p ~/.claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/carto-basics/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/carto-basics" ] && { [ ! -e ~/.claude/skills/carto-basics ] || { mv ~/.claude/skills/carto-basics "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/carto-basics" ~/.claude/skills/ && echo "Installed ~/.claude/skills/carto-basics" (macOS, Linux) — or add --global to the npx line. The curl line replaces .claude/skills/carto-basics/ only after the download succeeds, so files left there by another skill of the same name, or by an older release, do not mix in. A copy already there is moved aside, not deleted, and the line prints where.

Which clients pick it up on their own

A skill is a folder of text. Most of these read a skills folder and pick it up without being told; the rest take the same folder another way — an upload in the app, a parameter on an API call — and then choose it by its description just the same.

Claude Code.claude/skills/
Claude DesktopCustomize › Skills
ChatGPTSkills › Create › Upload
Cursor.cursor/skills/
VS Code.github/skills/
Codex CLI.agents/skills/
Gemini CLI.gemini/skills/
Grok Build.grok/skills/
Microsoft CopilotSkills › Upload a skill
PerplexityComputer › Skills › Upload a skill
DeepSeek Harness.dsh/skills/
Zed.agents/skills/
Devin Desktop.devin/skills/
Windsurf (legacy).windsurf/skills/
OpenAI Agents SDKInstructions or sandbox Skills
HTTP / APIa request parameter
This release
Versionnot versioned
Publishedno release date on file
PriceFree
Referencecartodb/carto-basics

Versions

Its author publishes no version number, so there is nothing here to pin to: what you install is the folder as it stands today. Instructions change more often than APIs do — a skill can be rewritten entirely without anything it depends on moving.

Pinning

Nothing to pin to: this skill carries no version number of its own. What you install is what the folder holds on the day you install it.

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