Coingecko — Printing Press CLI

Prerequisites: Install the CLI

This skill drives the

coingecko-pp-cli

binary. You must verify the CLI is installed before invoking any command from this skill. If it is missing, install it first:

Install via the Printing Press installer:

bash

npx -y @mvanhorn/printing-press install coingecko --cli-only

Verify:
```
coingecko-pp-cli --version
```
Ensure
```
$GOPATH/bin
```
(or
```
$HOME/go/bin
```
) is on
```
$PATH
```
.

If the

npx

install fails (no Node, offline, etc.), fall back to a direct Go install (requires Go 1.23+):

bash

go install github.com/mvanhorn/printing-press-library/library/payments/coingecko/cmd/coingecko-pp-cli@latest

--version

reports "command not found" after install, the install step did not put the binary on

$PATH

. Do not proceed with skill commands until verification succeeds.

When Not to Use This CLI

Do not activate this CLI for requests that require creating, updating, deleting, publishing, commenting, upvoting, inviting, ordering, sending messages, booking, purchasing, or changing remote state. This printed CLI exposes read-only commands for inspection, export, sync, and analysis.

HTTP Transport

This CLI uses Chrome-compatible HTTP transport for browser-facing endpoints. It does not require a resident browser process for normal API calls.

Command Reference

coins — Manage coins

```
coingecko-pp-cli coins detail
```
— Get current data for a coin
```
coingecko-pp-cli coins list
```
— List all coins with id, symbol, and name
```
coingecko-pp-cli coins markets
```
— List coins with market data

global — Manage global

```
coingecko-pp-cli global global
```
— Get global crypto market data

ping — Manage ping

```
coingecko-pp-cli ping ping
```
— Check API server status

search — Manage search

```
coingecko-pp-cli search search
```
— Search coins, categories, exchanges
```
coingecko-pp-cli coingecko-search-2
```
— Get trending coins

simple — Manage simple

```
coingecko-pp-cli simple price
```
— Get price of coins

coingecko-pp-cli simple supported-vs-currencies

— List supported vs currencies

Finding the right command

When you know what you want to do but not which command does it, ask the CLI directly:

bash

coingecko-pp-cli which "<capability in your own words>"

which

resolves a natural-language capability query to the best matching command from this CLI's curated feature index. Exit code

means at least one match; exit code

means no confident match — fall back to

--help

or use a narrower query.

Auth Setup

No authentication required.

Run

coingecko-pp-cli doctor

to verify setup.

Agent Mode

Add

--agent

to any command. Expands to:

--json --compact --no-input --no-color --yes

Pipeable — JSON on stdout, errors on stderr
Filterable —
```
--select
```
keeps a subset of fields. Dotted paths descend into nested structures; arrays traverse element-wise. Critical for keeping context small on verbose APIs:
bash
```
coingecko-pp-cli coins list --agent --select id,name,status
```
Previewable —
```
--dry-run
```
shows the request without sending
Offline-friendly — sync/search commands can use the local SQLite store when available
Non-interactive — never prompts, every input is a flag
Read-only — do not use this CLI for create, update, delete, publish, comment, upvote, invite, order, send, or other mutating requests

Response envelope

Commands that read from the local store or the API wrap output in a provenance envelope:

json

{
  "meta": {"source": "live" | "local", "synced_at": "...", "reason": "..."},
  "results": <data>
}

Parse

.results

for data and

.meta.source

to know whether it's live or local. A human-readable

N results (live)

summary is printed to stderr only when stdout is a terminal — piped/agent consumers get pure JSON on stdout.

Agent Feedback

When you (or the agent) notice something off about this CLI, record it:

coingecko-pp-cli feedback "the --since flag is inclusive but docs say exclusive"
coingecko-pp-cli feedback --stdin < notes.txt
coingecko-pp-cli feedback list --json --limit 10

Entries are stored locally at

~/.coingecko-pp-cli/feedback.jsonl

. They are never POSTed unless

COINGECKO_FEEDBACK_ENDPOINT

is set AND either

--send

is passed or

COINGECKO_FEEDBACK_AUTO_SEND=true

. Default behavior is local-only.

Write what surprised you, not a bug report. Short, specific, one line: that is the part that compounds.

Output Delivery

Every command accepts

--deliver <sink>

. The output goes to the named sink in addition to (or instead of) stdout, so agents can route command results without hand-piping. Three sinks are supported:

Sink	Effect
`stdout`	Default; write to stdout only
`file:<path>`	Atomically write output to `<path>` (tmp + rename)
`webhook:<url>`	POST the output body to the URL ( `application/json` or `application/x-ndjson` when `--compact` )

Unknown schemes are refused with a structured error naming the supported set. Webhook failures return non-zero and log the URL + HTTP status on stderr.

Named Profiles

A profile is a saved set of flag values, reused across invocations. Use it when a scheduled agent calls the same command every run with the same configuration - HeyGen's "Beacon" pattern.

coingecko-pp-cli profile save briefing --json
coingecko-pp-cli --profile briefing coins list
coingecko-pp-cli profile list --json
coingecko-pp-cli profile show briefing
coingecko-pp-cli profile delete briefing --yes

Explicit flags always win over profile values; profile values win over defaults.

agent-context

lists all available profiles under

available_profiles

so introspecting agents discover them at runtime.

Exit Codes

Code	Meaning
0	Success
2	Usage error (wrong arguments)
3	Resource not found
5	API error (upstream issue)
7	Rate limited (wait and retry)
10	Config error

Argument Parsing

Parse

$ARGUMENTS

Empty,
help
, or
--help
→ show
```
coingecko-pp-cli --help
```
output
Starts with
install
→ ends with
```
mcp
```
→ MCP installation; otherwise → see Prerequisites above
Anything else → Direct Use (execute as CLI command with
```
--agent
```
)

MCP Server Installation

Install the MCP server:

bash

go install github.com/mvanhorn/printing-press-library/library/payments/coingecko/cmd/coingecko-pp-mcp@latest

bash

claude mcp add coingecko-pp-mcp -- coingecko-pp-mcp

Verify:
```
claude mcp list
```

Direct Use

Check if installed:
```
which coingecko-pp-cli
```
If not found, offer to install (see Prerequisites at the top of this skill).
Match the user query to the best command from the Unique Capabilities and Command Reference above.

Execute with the

--agent

flag:

bash

coingecko-pp-cli <command> [subcommand] [args] --agent

If ambiguous, drill into subcommand help:
```
coingecko-pp-cli <command> --help
```
.

pp-coingecko

NPX Install

Tags

SKILL.md Content

Coingecko — Printing Press CLI

Prerequisites: Install the CLI

When Not to Use This CLI

HTTP Transport

Command Reference

Finding the right command

Auth Setup

Agent Mode

Response envelope

Agent Feedback

Output Delivery

Named Profiles

Exit Codes

Argument Parsing

MCP Server Installation

Direct Use