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 skills add spree/agent-skills --skill spree-api-v3git clone --depth 1 https://github.com/spree/agent-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/spree/agent-skills/spree-api-v3)<a href="https://agentmods.dev/skills/spree/agent-skills/spree-api-v3"><img src="https://agentmods.dev/badge/skills/spree/agent-skills/spree-api-v3.svg" alt="Measured on agentmods" height="20"></a>What 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 5.1 | $0.00156 | $0.03832 |
| Opus 5 | $0.00078 | $0.01916 |
| Sonnet 5 | $0.00031 | $0.00766 |
| Haiku 4.5 | $0.00016 | $0.00383 |
Grade A, and why
spree-api-v3 scanned grade A with 1 finding 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 7d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -H "X-Spree-Api-Key: pk_CzEKBTWFiuNLgz4wciLsS59n" \ How it starts
The opening of the file, as written. The whole thing — 316 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Spree API v3
Spree exposes two distinct API surfaces under /api/v3/:
| Surface | Path | Audience | Auth |
|---|---|---|---|
| Store API | /api/v3/store/* |
Storefronts, mobile apps, customers | Publishable key + optional JWT customer |
| Admin API | /api/v3/admin/* |
Back-office apps, integrations, admin SPAs | Secret key + scopes OR JWT admin + CanCanCan |
They share conventions (envelope shape, prefixed IDs, pagination) but have different auth, different default actions, and different exposed fields. This is the most-confused-about distinction in the API; cover it carefully.
Store API vs Admin API — the contract differences
Store API
Who calls it: customer browsers and apps. Public, untrusted clients.
Auth: Always include X-Spree-Api-Key: pk_<token> (a publishable key). Additional layers:
- Anonymous browse: publishable key alone is enough for reading products, categories.
- Guest cart: publishable key +
X-Spree-Token: <cart_token>for operations on a specific guest cart. - Logged-in customer: publishable key +
Authorization: Bearer <jwt>for account data, order history.
What's exposed: customer-visible fields only. Catalog and order Store serializers omit created_at/updated_at, exposing business dates instead (available_on, completed_at); a few resources (digitals, newsletter subscriptions) do include timestamps. No cost prices, no admin internal notes, no private metadata.
What actions are enabled: read-only by default. index and show for catalog endpoints. Cart/customer/address endpoints opt into create/update/destroy.
Channel scope: Store responses are scoped by X-Spree-Channel: <code> (e.g. online, pos). When omitted, the store's default channel is used. Products not published on the requested channel don't appear.
curl -H "X-Spree-Api-Key: pk_CzEKBTWFiuNLgz4wciLsS59n" \
-H "X-Spree-Channel: online" \
-H "Accept-Language: en-US" \
https://my-spree.example.com/api/v3/store/products
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.
- 7d ago First seen · 316 lines · 156 tokens per session scan A 30a6bdab538f
spree-api-v3 is a skill published in the GitHub repository spree/agent-skills (4 stars, last pushed 2mo ago), licensed MIT. It adds 156 tokens to every session and 3,832 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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