Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/timncox/squarespace-mcp/squarespacegit clone --depth 1 https://github.com/timncox/squarespace-mcpWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00000 | $0.03870 |
| Opus 5 | $0.00000 | $0.01935 |
| Sonnet 5 | $0.00000 | $0.00774 |
| Haiku 4.5 | $0.00000 | $0.00387 |
Grade A, and why
squarespace scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 272 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Squarespace Content Save API — Agent Reference
Reference for agents working with the Squarespace API layer. All methods are on ContentSaveClient in src/services/content-save.ts. Types in src/services/content-save-types.ts.
Authentication
- Session file:
storage/auth/sqsp-session.json(Playwright session export) - Crumb token: Extracted from site-specific cookies (NOT account.squarespace.com)
- Pre-flight:
ContentSaveClient.checkSessionHealth()— checks existence, age, crumb - Factory:
createContentSaveClient(subdomain)— loads cookies automatically - Sessions work 90+ hours but warn after 24h
Read-Modify-Write Pattern
All block/section modifications follow this pattern:
1. GET /api/page-sections/{pageSectionsId} → read current sections
2. Modify sections JSON in memory
3. PUT /api/page-sections/{pageSectionsId}/collection/{collectionId} → save
CRITICAL: PUT validates ALL blocks. Missing verticalAlignment or zIndex on ANY block causes 400 errors. Always backfill before PUT:
for (const gc of section.gridContents) {
if (gc.layout?.desktop && !gc.layout.desktop.verticalAlignment) {
gc.layout.desktop.verticalAlignment = 'top';
}
if (gc.layout?.desktop && gc.layout.desktop.zIndex == null) {
gc.layout.desktop.zIndex = 0;
}
}
Block Type Reference
| Type ID | Name | Add Method | Update Method | Find-By Strategy |
|---|---|---|---|---|
| 2 | Text | addTextBlock() |
updateTextBlock() / patchTextBlock() |
Stripped HTML text match |
| 18 | Menu | — | updateMenuBlock() |
Raw text, tab/section/item titles |
| 23 | Code | addCodeBlock() |
updateCodeBlock() |
Code content match |
| 44 | Quote | addQuoteBlock() |
updateQuoteBlock() |
Quote text / attribution |
| 46 | Button (legacy) | addButtonBlock() |
updateButtonBlock() |
Label text match |
| 1337 | Button (new) | addButtonBlock() |
updateButtonBlock() |
buttonText/buttonLink match (definitionName: website.components.button) |
| 1337 | Image | addImageBlock() / addImageBlockBatch() |
updateImageBlock() |
title/description/altText |
| 8 | Gallery | — | — | — |
| 52 | Divider | addDividerBlock() |
— | — |
| 50 | Video | addVideoBlock() |
updateVideoBlock() |
title/url match |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 272 lines · 0 tokens per session scan A 65d309d8f93c
squarespace is an agent published in the GitHub repository timncox/squarespace-mcp (2 stars, last pushed 25d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 3,870 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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