Managing Nylas

Nylas Management Skill

Manage and analyze Nylas calendar, email, and scheduling resources.

API Conventions

Authentication

All API calls use Bearer API key with grant ID, injected automatically.

Base URL

https://api.us.nylas.com/v3

Core Helper Function

#!/bin/bash

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

    if [ -n "$data" ]; then
        curl -s -X "$method" \
            -H "Authorization: Bearer $NYLAS_API_KEY" \
            -H "Content-Type: application/json" \
            "https://api.us.nylas.com/v3${endpoint}" \
            -d "$data"
    else
        curl -s -X "$method" \
            -H "Authorization: Bearer $NYLAS_API_KEY" \
            "https://api.us.nylas.com/v3${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 "=== Grants (Connected Accounts) ==="
nylas_api GET "/grants?limit=20" \
    | jq -r '.data[] | "\(.id[0:16])\t\(.email)\t\(.provider)\t\(.grant_status)\t\(.created_at | strftime("%Y-%m-%d"))"' \
    | column -t | head -15

echo ""
echo "=== Calendars ==="
GRANT_ID=$(nylas_api GET "/grants?limit=1" | jq -r '.data[0].id')
nylas_api GET "/grants/$GRANT_ID/calendars?limit=20" \
    | jq -r '.data[] | "\(.id[0:16])\t\(.name[0:30])\t\(.is_primary)\t\(.read_only)"' \
    | column -t | head -15

echo ""
echo "=== Upcoming Events ==="
nylas_api GET "/grants/$GRANT_ID/events?limit=20&start=$(date +%s)&calendar_id=primary" \
    | jq -r '.data[] | "\(.when.start_time | strftime("%Y-%m-%d %H:%M"))\t\(.title[0:30])\t\(.status)\t\(.participants | length) attendees"' \
    | head -15

Phase 2: Analysis

Calendar Health

#!/bin/bash
GRANT_ID=$(nylas_api GET "/grants?limit=1" | jq -r '.data[0].id')

echo "=== Event Summary (next 7 days) ==="
START=$(date +%s)
END=$(date -d '7 days' +%s)
nylas_api GET "/grants/$GRANT_ID/events?limit=100&start=$START&end=$END&calendar_id=primary" \
    | jq '{
        total_events: (.data | length),
        by_status: (.data | group_by(.status) | map({(.[0].status): length}) | add),
        avg_duration_min: (.data | map((.when.end_time - .when.start_time) / 60) | if length > 0 then add / length | floor else 0 end)
    }'

echo ""
echo "=== Events Per Day ==="
nylas_api GET "/grants/$GRANT_ID/events?limit=100&start=$START&end=$END&calendar_id=primary" \
    | jq -r '.data[] | .when.start_time | strftime("%Y-%m-%d")' | sort | uniq -c | sort -k2

echo ""
echo "=== Cancelled/Declined Events ==="
nylas_api GET "/grants/$GRANT_ID/events?limit=20&start=$START&end=$END&calendar_id=primary" \
    | jq -r '.data[] | select(.status == "cancelled") | "\(.when.start_time | strftime("%Y-%m-%d %H:%M"))\t\(.title[0:30])"' \
    | head -10

Account Sync Health

#!/bin/bash
echo "=== Grant Status Summary ==="
nylas_api GET "/grants?limit=50" \
    | jq -r '.data[] | .grant_status' | sort | uniq -c | sort -rn

echo ""
echo "=== Grants with Issues ==="
nylas_api GET "/grants?limit=50" \
    | jq -r '.data[] | select(.grant_status != "valid") | "\(.id[0:16])\t\(.email)\t\(.grant_status)\t\(.provider)"' \
    | head -10

echo ""
echo "=== Scheduling Pages ==="
nylas_api GET "/scheduling/configurations?limit=10" \
    | jq -r '.data[] | "\(.id[0:16])\t\(.name[0:30])\t\(.event_booking.duration_minutes)min"' \
    | head -10

Output Format

=== Nylas Account ===
Connected Grants: <n>  Healthy: <n>  Invalid: <n>

--- Calendar (7d) ---
Events: <n>  Avg Duration: <n>min
By Status: confirmed: <n>, cancelled: <n>

--- Scheduling Pages ---
Total: <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

Common Pitfalls

• Grant-scoped: Most endpoints require a grant ID in the URL path
• Timestamps: Use Unix epoch seconds for event time filters
• v3 API: Nylas v3 is significantly different from v2; use v3 endpoints
• Rate limits: 5 requests/second per grant; 60 requests/second per application
• Provider differences: Google, Microsoft, and IMAP have different capabilities