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 adadiamonds/agent-tools --skill ada-diamonds-commercegit clone --depth 1 https://github.com/adadiamonds/agent-toolsWrote 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/adadiamonds/agent-tools/ada-diamonds-commerce)<a href="https://agentmods.dev/skills/adadiamonds/agent-tools/ada-diamonds-commerce"><img src="https://agentmods.dev/badge/skills/adadiamonds/agent-tools/ada-diamonds-commerce/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/adadiamonds/agent-tools/ada-diamonds-commerce"><img src="https://agentmods.dev/badge/skills/adadiamonds/agent-tools/ada-diamonds-commerce.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00110 | $0.02288 |
| Opus 5 | $0.00055 | $0.01144 |
| Sonnet 5 | $0.00022 | $0.00458 |
| Haiku 4.5 | $0.00011 | $0.00229 |
Grade A, and why
ada-diamonds-commerce 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 9d 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 -X POST https://www.adadiamonds.com/api/acp/checkout_sessions \ How it starts
The opening of the file, as written. The whole thing — 116 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agentic checkout at Ada Diamonds
Ada Diamonds implements the two open agentic commerce protocols on top of its existing Stripe and order pipeline. Both reduce to the same flow: create a session from item ids, get an authoritative priced cart, add buyer and shipping details, complete with a payment credential, receive an order id and permalink.
| Protocol | Discovery | Endpoint base | Who calls it |
|---|---|---|---|
| OpenAI ACP (Agentic Checkout) | https://www.adadiamonds.com/.well-known/acp.json |
https://www.adadiamonds.com/api/acp |
ChatGPT and other ACP-speaking agent platforms |
| Google UCP | https://www.adadiamonds.com/.well-known/ucp |
advertised in the discovery document (services["dev.ucp.shopping"], transport rest) |
Google AI Mode, Gemini, and other UCP platforms |
Product feed for both: https://www.adadiamonds.com/feeds/acp-products.jsonl (one JSON object per line, ACP Product Feed spec fields, same stable item ids as checkout).
Money
All amounts are US dollars. The ACP and UCP wire formats define their own numeric representation for amount, subtotal, tax, and total fields; read https://www.adadiamonds.com/openapi.json for the exact type on each field before doing arithmetic, and never assume a checkout total and a catalog price share a unit without checking. An engagement ring is a setting item plus a diamond item, priced separately, in checkout as everywhere else on Ada Diamonds.
ACP checkout sessions
Base: https://www.adadiamonds.com/api/acp
| Method | Path | Success |
|---|---|---|
POST |
/checkout_sessions |
201 with the full cart state |
POST |
/checkout_sessions/{id} |
200 (update buyer, address, fulfillment choice, items) |
GET |
/checkout_sessions/{id} |
200 or 404 |
POST |
/checkout_sessions/{id}/complete |
200 with status: "completed" and an order |
POST |
/checkout_sessions/{id}/cancel |
200, or 405 if already completed or canceled |
Headers on every request:
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.
- 9d ago First seen · 116 lines · 110 tokens per session scan A af1d3edcc031
ada-diamonds-commerce is a skill published in the GitHub repository adadiamonds/agent-tools (2 stars, last pushed 11d ago), licensed MIT. It adds 110 tokens to every session and 2,288 once invoked, about $0.0006 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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