Canvas LMS — Course & Assignment Access

Read-only access to Canvas LMS for listing courses and assignments.

Scripts

• scripts/canvas_api.py — Python CLI for Canvas API calls

Setup

1. Log in to your Canvas instance in a browser
2. Go to Account → Settings (click your profile icon, then Settings)
3. Scroll to Approved Integrations and click + New Access Token
4. Name the token (e.g., "Hermes Agent"), set an optional expiry, and click Generate Token
5. Copy the token and add to ${HERMES_HOME:-~/.hermes}/.env:

CANVAS_API_TOKEN=your_token_here
CANVAS_BASE_URL=https://yourschool.instructure.com

The base URL is whatever appears in your browser when you're logged into Canvas (no trailing slash).

Usage

bash
CANVAS="python $HERMES_HOME/skills/productivity/canvas/scripts/canvas_api.py"

# List all active courses
$CANVAS list_courses --enrollment-state active

# List all courses (any state)
$CANVAS list_courses

# List assignments for a specific course
$CANVAS list_assignments 12345

# List assignments ordered by due date
$CANVAS list_assignments 12345 --order-by due_at

Output Format

list_courses returns:

json
[{"id": 12345, "name": "Intro to CS", "course_code": "CS101", "workflow_state": "available", "start_at": "...", "end_at": "..."}]

list_assignments returns:

json
[{"id": 67890, "name": "Homework 1", "due_at": "2025-02-15T23:59:00Z", "points_possible": 100, "submission_types": ["online_upload"], "html_url": "...", "description": "...", "course_id": 12345}]

Note: Assignment descriptions are truncated to 500 characters. The html_url field links to the full assignment page in Canvas.

API Reference (curl)

bash
# List courses
curl -s -H "Authorization: Bearer $CANVAS_API_TOKEN" \
  "$CANVAS_BASE_URL/api/v1/courses?enrollment_state=active&per_page=10"

# List assignments for a course
curl -s -H "Authorization: Bearer $CANVAS_API_TOKEN" \
  "$CANVAS_BASE_URL/api/v1/courses/COURSE_ID/assignments?per_page=10&order_by=due_at"

Canvas uses Link headers for pagination. The Python script handles pagination automatically.

Rules

• This skill is read-only — it only fetches data, never modifies courses or assignments
• On first use, verify auth by running $CANVAS list_courses — if it fails with 401, guide the user through setup
• Canvas rate-limits to ~700 requests per 10 minutes; check X-Rate-Limit-Remaining header if hitting limits

Troubleshooting

| Problem | Fix | |---------|-----| | 401 Unauthorized | Token invalid or expired — regenerate in Canvas Settings | | 403 Forbidden | Token lacks permission for this course | | Empty course list | Try --enrollment-state active or omit the flag to see all states | | Wrong institution | Verify CANVAS_BASE_URL matches the URL in your browser | | Timeout errors | Check network connectivity to your Canvas instance |