pp-erank - SKILL.md Agent Skill

name: pp-erank description: "Keyword Tool data from eRank, plus local scoring, drift, and listing-gap analysis for Etsy sellers. Trigger phrases: research dad mug on eRank, score an Etsy keyword, find eRank top listings, compare Etsy listing tags, use eRank, run eRank." author: "horknfbr" license: "Apache-2.0" argument-hint: " [args] | install cli|mcp" allowed-tools: "Read Bash" metadata: openclaw: requires: bins: - erank-pp-cli install: - kind: go bins: [erank-pp-cli] module: github.com/mvanhorn/printing-press-library/library/marketing/erank/cmd/erank-pp-cli

eRank — Printing Press CLI

Prerequisites: Install the CLI

This skill drives the erank-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 erank --cli-only
```
Verify: erank-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 1.26.4 or newer):

go install github.com/mvanhorn/printing-press-library/library/marketing/erank/cmd/erank-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.

When to Use This CLI

Use this CLI when you need repeatable eRank Keyword Tool research from an agent or script. It is strongest for Etsy keyword decisions, tag extraction, top-listing comparisons, and tracking changes over time.

Unique Capabilities

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

Seller decisions

opportunity — Score a keyword as a seller opportunity using eRank stats, difficulty, competition, and current top listings.

Use this when an agent needs a go/no-go read on a keyword instead of separate raw metric calls.
```
erank-pp-cli opportunity "dad mug" --source etsy --country USA --agent
```
lists optimize — Rank saved keyword lists by weak, saturated, overlapping, and missing keyword opportunities.

Use this when an agent needs to clean up a seller's research list before drafting listings.
```
erank-pp-cli lists optimize "Father's Day mugs" --country USA --agent
```
saturation — Flag crowded keywords by combining competition, difficulty, tag reuse, and top-listing density.

Use this to avoid chasing keywords that look popular but are too crowded to enter.
```
erank-pp-cli saturation "dad mug" --source etsy --country USA --agent
```

Listing optimization

listing gaps — Compare a draft listing title and tags against phrases and tags appearing in top eRank results.

Use this before publishing or rewriting an Etsy listing from keyword evidence.
```
erank-pp-cli listing gaps "dad mug" --title "Funny Dad Coffee Mug" --tags "dad gift,fathers day,mug" --agent
```
tags consensus — Find tags that repeatedly appear across top listings, Etsy tag data, related searches, and near matches.

Use this when an agent needs defensible tag candidates grounded in multiple signals.
```
erank-pp-cli tags consensus "dad mug" --source etsy --country USA --min-count 3 --agent
```

Local history

watch drift — Detect meaningful changes in keyword competition, difficulty, and top listings across saved snapshots.

Use this to monitor seasonal or competitive shifts without rereading full eRank pages.
```
erank-pp-cli watch drift "dad mug" --days 30 --threshold 15 --agent
```

Product research

angles — Extract product angles from related searches, near matches, tags, and current top listings.

Use this when an agent needs product-angle ideas tied to observed demand signals.
```
erank-pp-cli angles "dad mug" --source etsy --country USA --limit 10 --agent
```

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.

Discovery Signals

This CLI was generated with browser-observed traffic context.

Capture coverage: 61 API entries from 233 total network entries
Protocols: rest_json (75% confidence)
Auth signals: api_key — query: keyword
Generation hints: browser_http_transport, requires_protected_client, weak_schema_confidence
Candidate command ideas: create_competition — Derived from observed POST /api/keyword-tool/competition traffic.; create_google_data — Derived from observed POST /api/keyword-tool/google-data traffic.; create_keyword_difficulty — Derived from observed POST /api/keyword-tool/keyword-difficulty traffic.; create_save_history — Derived from observed POST /api/keyword-tool/save-history traffic.; get_user_preferences — Derived from observed GET /api/account/user-preferences/{user_preference_id} traffic.; list_check_paddle_restriction — Derived from observed GET /api/check-paddle-restriction traffic.; list_check_token_validity — Derived from observed GET /api/oauth/check-token-validity traffic.; list_customer — Derived from observed GET /dotjs/v1/quests/customer/ 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

account — Operations on sideBarCollapse

erank-pp-cli account get-user-preferences — GET /api/account/user-preferences/{user_preference_id}
erank-pp-cli account list-keyword-tool.near-matches.table.config.columns — GET /api/account/user-preferences/keyword-tool.near-matches.table.config.columns
erank-pp-cli account list-kt-keyword-ideas — GET /api/account/user-preferences/kt_keyword_ideas
erank-pp-cli account list-member-preferences — GET /api/account/member-preferences
erank-pp-cli account list-search-country — GET /api/account/user-preferences/searchCountry
erank-pp-cli account list-side-bar-collapse — GET /api/account/user-preferences/sideBarCollapse

build — Operations on version.json

erank-pp-cli build — GET /build/version.json

check-paddle-restriction — Operations on check-paddle-restriction

erank-pp-cli check-paddle-restriction — GET /api/check-paddle-restriction

intercom — Operations on intercom

erank-pp-cli intercom — GET /api/intercom

keyword-tool — Operations on stats

erank-pp-cli keyword-tool create-competition — POST /api/keyword-tool/competition
erank-pp-cli keyword-tool create-google-data — POST /api/keyword-tool/google-data
erank-pp-cli keyword-tool create-keyword-difficulty — POST /api/keyword-tool/keyword-difficulty
erank-pp-cli keyword-tool create-save-history — POST /api/keyword-tool/save-history
erank-pp-cli keyword-tool list-etsy-tags — GET /api/keyword-tool/etsy-tags
erank-pp-cli keyword-tool list-near-matches — GET /api/keyword-tool/near-matches
erank-pp-cli keyword-tool list-related-searches — GET /api/keyword-tool/related-searches
erank-pp-cli keyword-tool list-stats — GET /api/keyword-tool/stats
erank-pp-cli keyword-tool list-top-listings — GET /api/keyword-tool/top-listings

keywordlist — Operations on names

erank-pp-cli keywordlist list-names — GET /api/keywordlist/names
erank-pp-cli keywordlist list-terms — GET /api/keywordlist/terms

member-shops — Operations on member-shops

erank-pp-cli member-shops — GET /api/member-shops

motd-v3 — Operations on keyword-tool

erank-pp-cli motd-v3 — GET /api/motd-v3/keyword-tool

oauth — Operations on check-token-validity

erank-pp-cli oauth — GET /api/oauth/check-token-validity

quota — Operations on daily

erank-pp-cli quota — GET /api/quota/daily

refresh-data — Operations on last-refresh

erank-pp-cli refresh-data — GET /api/refresh-data/listings/last-refresh

Freshness Contract

This printed CLI owns bounded freshness only for registered store-backed read command paths. In --data-source auto mode, those paths check sync_state and may run a bounded refresh before reading local data. --data-source local never refreshes. --data-source live reads the API and does not mutate the local store. Set ERANK_NO_AUTO_REFRESH=1 to skip the freshness hook without changing source selection.

Covered paths:

erank-pp-cli account
erank-pp-cli account get
erank-pp-cli account list
erank-pp-cli account search
erank-pp-cli account-user-preferences-keyword-tool-near-matches-table-config-columns
erank-pp-cli account-user-preferences-keyword-tool-near-matches-table-config-columns get
erank-pp-cli account-user-preferences-keyword-tool-near-matches-table-config-columns list
erank-pp-cli account-user-preferences-keyword-tool-near-matches-table-config-columns search
erank-pp-cli account-user-preferences-kt-keyword-ideas
erank-pp-cli account-user-preferences-kt-keyword-ideas get
erank-pp-cli account-user-preferences-kt-keyword-ideas list
erank-pp-cli account-user-preferences-kt-keyword-ideas search
erank-pp-cli account-user-preferences-search-country
erank-pp-cli account-user-preferences-search-country get
erank-pp-cli account-user-preferences-search-country list
erank-pp-cli account-user-preferences-search-country search
erank-pp-cli account-user-preferences-side-bar-collapse
erank-pp-cli account-user-preferences-side-bar-collapse get
erank-pp-cli account-user-preferences-side-bar-collapse list
erank-pp-cli account-user-preferences-side-bar-collapse search
erank-pp-cli build
erank-pp-cli build get
erank-pp-cli build list
erank-pp-cli build search
erank-pp-cli check-paddle-restriction
erank-pp-cli check-paddle-restriction get
erank-pp-cli check-paddle-restriction list
erank-pp-cli check-paddle-restriction search
erank-pp-cli intercom
erank-pp-cli intercom get
erank-pp-cli intercom list
erank-pp-cli intercom search
erank-pp-cli keywordlist
erank-pp-cli keywordlist get
erank-pp-cli keywordlist list
erank-pp-cli keywordlist search
erank-pp-cli keywordlist-terms
erank-pp-cli keywordlist-terms get
erank-pp-cli keywordlist-terms list
erank-pp-cli keywordlist-terms search
erank-pp-cli member-shops
erank-pp-cli member-shops get
erank-pp-cli member-shops list
erank-pp-cli member-shops search
erank-pp-cli motd-v3
erank-pp-cli motd-v3 get
erank-pp-cli motd-v3 list
erank-pp-cli motd-v3 search
erank-pp-cli oauth
erank-pp-cli oauth get
erank-pp-cli oauth list
erank-pp-cli oauth search
erank-pp-cli quota
erank-pp-cli quota get
erank-pp-cli quota list
erank-pp-cli quota search
erank-pp-cli refresh-data
erank-pp-cli refresh-data get
erank-pp-cli refresh-data list
erank-pp-cli refresh-data search

When JSON output uses the generated provenance envelope, freshness metadata appears at meta.freshness. Treat it as current-cache freshness for the covered command path, not a guarantee of complete historical backfill or API-specific enrichment.

Finding the right command

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

erank-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

Compact top listings for an agent

erank-pp-cli keyword-tool list-top-listings --keyword "dad mug" --marketplace etsy --country USA --agent --select title,shop_name,price,tags

Returns only listing fields an agent needs for comparison.

Score a niche before drafting

erank-pp-cli opportunity "dad mug" --source etsy --country USA --agent

Combines eRank keyword and listing signals into a go/no-go score.

Find defensible tags

erank-pp-cli tags consensus "dad mug" --source etsy --country USA --min-count 3 --agent

Extracts recurring tag evidence across captured eRank surfaces.

Check draft listing gaps

erank-pp-cli listing gaps "dad mug" --title "Funny Dad Coffee Mug" --tags "dad gift,fathers day,mug" --agent

Compares draft copy to top-ranking listing evidence.

Auth Setup

This CLI uses an authenticated eRank member session. Run the generated auth setup flow before live commands; captured endpoints require the same browser-compatible session that powers eRank's member tools.

Run erank-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:
```
erank-pp-cli account get-user-preferences mock-value --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:

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

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

erank-pp-cli profile save briefing --json
erank-pp-cli --profile briefing account get-user-preferences mock-value
erank-pp-cli profile list --json
erank-pp-cli profile show briefing
erank-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 erank-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/erank/cmd/erank-pp-mcp@latest

claude mcp add erank-pp-mcp -- erank-pp-mcp

Verify: claude mcp list

Direct Use

Check if installed: which erank-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:

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

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