Courier Management Skill

Manage and analyze Courier notification resources including messages, templates, and delivery analytics.

API Conventions

Authentication

All API calls use Bearer auth token, injected automatically.

Base URL

https://api.courier.com

Core Helper Function

#!/bin/bash

courier_api() {
    local method="$1"
    local endpoint="$2"
    local data="${3:-}"

    if [ -n "$data" ]; then
        curl -s -X "$method" \
            -H "Authorization: Bearer $COURIER_AUTH_TOKEN" \
            -H "Content-Type: application/json" \
            "https://api.courier.com${endpoint}" \
            -d "$data"
    else
        curl -s -X "$method" \
            -H "Authorization: Bearer $COURIER_AUTH_TOKEN" \
            "https://api.courier.com${endpoint}"
    fi
}

Output Rules

• Target ≤50 lines per script output
• Use jq to extract only needed fields
• Never dump full API responses

Phase 1: Discovery

#!/bin/bash
echo "=== Recent Messages ==="
courier_api GET "/messages?limit=20" \
    | jq -r '.results[] | "\(.id[0:16])\t\(.status)\t\(.event[0:20])\t\(.recipient[0:16])\t\(.enqueued | . / 1000 | strftime("%Y-%m-%d"))"' \
    | column -t | head -20

echo ""
echo "=== Notification Templates ==="
courier_api GET "/notifications?limit=20" \
    | jq -r '.results[] | "\(.id[0:16])\t\(.title[0:30])\t\(.tags | join(",") | .[0:20])"' \
    | column -t | head -15

echo ""
echo "=== Brands ==="
courier_api GET "/brands?limit=10" \
    | jq -r '.results[] | "\(.id[0:16])\t\(.name)\t\(.published // false)"' | head -10

Phase 2: Analysis

Delivery Analytics

#!/bin/bash
echo "=== Message Status Summary ==="
courier_api GET "/messages?limit=100" \
    | jq -r '.results[] | .status' | sort | uniq -c | sort -rn

echo ""
echo "=== Messages by Event/Template ==="
courier_api GET "/messages?limit=100" \
    | jq -r '.results[] | .event // "unknown"' | sort | uniq -c | sort -rn | head -10

echo ""
echo "=== Failed Messages ==="
courier_api GET "/messages?limit=20&status=UNDELIVERABLE" \
    | jq -r '.results[] | "\(.id[0:16])\t\(.event[0:20])\t\(.recipient[0:16])\t\(.reason // "no reason")"' \
    | head -10

echo ""
echo "=== Delivery Channels Used ==="
courier_api GET "/messages?limit=100" \
    | jq -r '.results[] | .channel // "unknown"' | sort | uniq -c | sort -rn

User & Preference Management

#!/bin/bash
echo "=== Recent Profiles ==="
courier_api GET "/profiles?limit=15" \
    | jq -r '.results[] | "\(.id[0:20])\t\(.profile.email // "no-email")"' | head -15

echo ""
echo "=== Subscription Topics ==="
courier_api GET "/preferences?limit=20" \
    | jq -r '.items[] | "\(.id[0:16])\t\(.topic_name)\t\(.default_status)"' | head -15

echo ""
echo "=== Lists ==="
courier_api GET "/lists?limit=15" \
    | jq -r '.results[] | "\(.id)\t\(.name[0:30])"' | head -15

Output Format

=== Courier Workspace ===
Templates: <n>  Brands: <n>

--- Message Delivery ---
DELIVERED: <n>  SENT: <n>  UNDELIVERABLE: <n>  OPENED: <n>

--- By Template ---
<event>: <n> messages

--- By Channel ---
email: <n>  push: <n>  sms: <n>

Anti-Hallucination Rules

1. NEVER assume resource names — always discover via CLI/API in Phase 1 before referencing in Phase 2.
2. NEVER fabricate metric names or dimensions — verify against the service documentation or --help output.
3. NEVER mix CLI commands between service versions — confirm which version/API you are targeting.
4. ALWAYS use the discovery → verify → analyze chain — every resource referenced must have been discovered first.
5. ALWAYS handle empty results gracefully — an empty response is valid data, not an error to retry.

Counter-Rationalizations

Shortcut	Counter	Why
"I'll skip discovery and check known resources"	Always run Phase 1 discovery first	Resource names change, new resources appear — assumed names cause errors
"The user only asked for a quick check"	Follow the full discovery → analysis flow	Quick checks miss critical issues; structured analysis catches silent failures
"Default configuration is probably fine"	Audit configuration explicitly	Defaults often leave logging, security, and optimization features disabled
"Metrics aren't needed for this"	Always check relevant metrics when available	API/CLI responses show current state; metrics reveal trends and intermittent issues
"I don't have access to that"	Try the command and report the actual error	Assumed permission failures prevent useful investigation; actual errors are informative

Common Pitfalls

• Message statuses: ENQUEUED, SENT, DELIVERED, OPENED, CLICKED, UNDELIVERABLE, UNMAPPED
• Timestamps: Unix milliseconds in responses
• Pagination: Use limit and cursor; check paging.cursor for next page
• Rate limits: 20 requests/second for most endpoints
• Two auth tokens: Published (production) and Draft (test) tokens are separate