name: pp-kdpnichefinder description: "Every KDP Niche Finder bucket as a local research database — rank niches across buckets Trigger phrases: `find a kdp niche`, `rank kdp niches`, `which book niche is rising`, `kdp niche research`, `best low-content book niche`, `use kdpnichefinder`, `run kdpnichefinder`." author: "Vincent Colombo" license: "Apache-2.0" argument-hint: "<command> [args] | install cli|mcp" allowed-tools: "Read Bash" metadata: openclaw: requires: bins: - kdpnichefinder-pp-cli install: - kind: go bins: [kdpnichefinder-pp-cli] module: github.com/mvanhorn/printing-press-library/library/marketing/kdpnichefinder/cmd/kdpnichefinder-pp-cli

KDP Niche Finder — Printing Press CLI

Prerequisites: Install the CLI

This skill drives the kdpnichefinder-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. It defaults binaries to $HOME/.local/bin on macOS/Linux and %LOCALAPPDATA%\Programs\PrintingPress\bin on Windows:
```
npx -y @mvanhorn/printing-press-library install kdpnichefinder --cli-only
```
Verify: kdpnichefinder-pp-cli --version
Ensure the reported install directory is on $PATH for the agent/runtime that will invoke this skill.

If the npx install fails (no Node, offline, etc.), fall back to a direct Go install (requires Go 1.26.6 or newer). This installs into $GOPATH/bin (default $HOME/go/bin), so add that directory to $PATH instead:

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

If --version reports "command not found" after install, the runtime cannot see the binary directory on $PATH. Do not proceed with skill commands until verification succeeds.

KDP Niche Finder is a click-to-browse web tool that shows one curated niche bucket at a time with no history and no export. This CLI mirrors all four buckets into local SQLite so you can rank niches by opportunity across buckets (rank), see which niches are rising or fading since your last refresh (drift), spot books that appear in multiple buckets (dupes), gauge publisher saturation, and export KDP-ready CSVs — all offline and agent-native.

When to Use This CLI

Use this CLI when an agent or power user needs to research Amazon KDP niches programmatically: ranking opportunities across all buckets, tracking niche revenue trends over time, studying publisher competition, or exporting shortlists. It turns KDP Niche Finder's browse-only web UI into a queryable local database.

Anti-triggers

Do not use this CLI for:

Do not use this CLI to generate book covers or interiors — that is Artistly's generation suite, not this niche tool.
Do not use it for live Amazon BSR lookups of arbitrary ASINs — it only covers the curated KDP Niche Finder buckets.
Do not use it for non-US marketplaces — the source data is US-centric.

Unique Capabilities

These capabilities aren't available in any other tool for this API.

Local state that compounds

rank — Rank niches across all four buckets at once by a composite of estimated revenue, sales, and price.

Pick this when an agent needs the single best niche by opportunity, not a bucket-by-bucket browse.
```
kdpnichefinder-pp-cli rank --max-price 9.99 --sort value --agent
```
drift — Show which synced niches are rising or fading in estimated revenue versus an earlier snapshot.

Pick this for timing decisions (publish now vs skip) that the source tool cannot answer at all.
```
kdpnichefinder-pp-cli drift --since 7d --sort rising --agent
```
keywords — Tokenize synced book titles and count keyword frequency to surface hot terms for a niche.

Pick this to seed KDP backend keyword fields from what is actually selling.
```
kdpnichefinder-pp-cli keywords --type evergreen --min-count 3 --agent
```

Cross-bucket analysis

dupes — Find books that appear in more than one niche bucket (same ASIN) and show which buckets.

Pick this to spot niches surfacing in multiple buckets, a strong cross-validated signal.
```
kdpnichefinder-pp-cli dupes --agent
```
saturation — Per bucket, show how concentrated estimated revenue is among publishers (whale vs fragmented).

Pick this to tell an open niche from one a single publisher already dominates.
```
kdpnichefinder-pp-cli saturation --type hidden_gems --agent
```
competitors — For a focus book, list same-publisher and same-price-band competitors using the extracted ASIN.

Pick this to study who else is winning a specific niche before committing to it.
```
kdpnichefinder-pp-cli competitors 2584 --agent
```

Agent-native plumbing

export — Export title, ASIN, price, estimated sales, and revenue as CSV for KDP backend keyword and cover work.

Pick this to hand a shortlist off to keyword/cover tooling without retyping titles.
```
kdpnichefinder-pp-cli export --csv
```

Discovery Signals

This CLI was generated with browser-observed traffic context.

Capture coverage: 60 API entries from 273 total network entries
Protocols: rest_json (75% confidence), html_scrape (55% confidence)
Candidate command ideas: create_folders — Derived from observed POST /api/folders traffic.; create_toggle_save — Derived from observed POST /api/books/{book_id}/toggle-save traffic.; list_categories — Derived from observed GET /api/categories traffic.; list_evergreen — Derived from observed GET /app/category/evergreen traffic.; list_folders — Derived from observed GET /api/folders traffic.; list_fresh_money — Derived from observed GET /app/category/fresh_money traffic.; list_hidden_gems — Derived from observed GET /app/category/hidden_gems traffic.; list_high_ticket — Derived from observed GET /app/category/high_ticket traffic.
Caveats: empty_payload: API-looking request returned an empty or null payload; schema confidence is weak.; empty_payload: API-looking request returned an empty or null payload; schema confidence is weak.; empty_payload: API-looking request returned an empty or null payload; schema confidence is weak.; empty_payload: API-looking request returned an empty or null payload; schema confidence is weak.; empty_payload: API-looking request returned an empty or null payload; schema confidence is weak.; empty_payload: API-looking request returned an empty or null payload; schema confidence is weak.; empty_payload: API-looking request returned an empty or null payload; schema confidence is weak.; empty_payload: API-looking request returned an empty or null payload; schema confidence is weak.; empty_payload: API-looking request returned an empty or null payload; schema confidence is weak.; empty_payload: API-looking request returned an empty or null payload; schema confidence is weak.

Command Reference

books — Save and unsave niche books

kdpnichefinder-pp-cli books <book_id> — Toggle save/unsave a book; optionally into a folder

categories — Niche bucket metadata

kdpnichefinder-pp-cli categories — List niche bucket categories (key, name, description)

folders — Organize saved niches into folders

kdpnichefinder-pp-cli folders create — Create a folder
kdpnichefinder-pp-cli folders list — List your folders

niches — Browse curated KDP niche buckets (real Amazon books with estimated sales/revenue)

kdpnichefinder-pp-cli niches <type> — Browse a niche bucket: evergreen, fresh_money, hidden_gems, or high_ticket

saved — Your saved niche books

kdpnichefinder-pp-cli saved — List your saved books

user — Authenticated account

kdpnichefinder-pp-cli user — Show the authenticated user

Finding the right command

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

kdpnichefinder-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 0 means at least one match; exit code 2 means no confident match — fall back to --help or use a narrower query.

Recipes

Best low-price niche across all buckets

kdpnichefinder-pp-cli rank --max-price 9.99 --sort value --agent

Ranks every synced book by revenue-per-dollar so cheap, high-return niches surface first.

Narrow a verbose niche list to the fields that matter

kdpnichefinder-pp-cli niches hidden_gems --search journal --agent --select title,estimated_monthly_revenue,amazon_url

Uses dotted --select paths to pull just title, revenue, and Amazon link from the paginated bucket response.

Spot rising niches week over week

kdpnichefinder-pp-cli drift --since 7d --sort rising --agent

Diffs the latest snapshot against one a week ago to show niches gaining estimated revenue.

Export a saved shortlist for keyword work

kdpnichefinder-pp-cli export --csv

Emits title/ASIN/price/sales/revenue as CSV for KDP backend keyword and cover tooling.

Auth Setup

KDP Niche Finder uses a Laravel session login (no API key). Run kdpnichefinder-pp-cli auth login --chrome to capture your logged-in kdpnichefinder.com browser session; reads use the session cookie and saves/folders additionally send the CSRF token the CLI composes for you.

Run kdpnichefinder-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:
```
kdpnichefinder-pp-cli categories --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
Explicit retries — use --idempotent only when an already-existing create should count as success

Response envelope

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

{
  "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 AND no machine-format flag (--json, --csv, --compact, --quiet, --plain, --select) is set — piped/agent consumers and explicit-format runs get pure JSON on stdout.

Agent Feedback

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

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

Entries are stored locally at ~/.local/share/kdpnichefinder-pp-cli/feedback.jsonl. They are never POSTed unless KDPNICHEFINDER_FEEDBACK_ENDPOINT is set AND either --send is passed or KDPNICHEFINDER_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.

kdpnichefinder-pp-cli profile save briefing --json
kdpnichefinder-pp-cli --profile briefing categories
kdpnichefinder-pp-cli profile list --json
kdpnichefinder-pp-cli profile show briefing
kdpnichefinder-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 | | 4 | Authentication required | | 5 | API error (upstream issue) | | 7 | Rate limited (wait and retry) | | 10 | Config error |

Argument Parsing

Parse $ARGUMENTS:

Empty, help, or --help → show kdpnichefinder-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:

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

claude mcp add kdpnichefinder-pp-mcp -- kdpnichefinder-pp-mcp

Verify: claude mcp list

Direct Use

Check if installed: which kdpnichefinder-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:

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

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

KDP Niche Finder CLI

Recommended for