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 rules/twells89/sigma-migration-skills/sigma-apigit clone --depth 1 https://github.com/twells89/sigma-migration-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/rules/twells89/sigma-migration-skills/sigma-api)<a href="https://agentmods.dev/rules/twells89/sigma-migration-skills/sigma-api"><img src="https://agentmods.dev/badge/rules/twells89/sigma-migration-skills/sigma-api.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 | $0.00103 | $0.02396 |
| Opus 5 | $0.00051 | $0.01198 |
| Sonnet 5 | $0.00021 | $0.00479 |
| Haiku 4.5 | $0.00010 | $0.00240 |
Grade A, and why
sigma-api 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 5d 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.
description: "Authenticate against the Sigma Computing REST API and obtain a bearer token. Use whenever the user wants to call the Sigma API directly with curl/HTTP, exchange OAuth client credentials for an access token, How it starts
The opening of the file, as written. The whole thing — 148 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Authenticate against the Sigma Computing REST API and obtain a bearer token. Use whenever the user wants to call the Sigma API directly with curl/HTTP, exchange OAuth client credentials for an access token, sign in interactively via a browser OAuth login (authorization-code + PKCE), configure SIGMA_BASE_URL / SIGMA_CLIENT_ID / SIGMA_CLIENT_SECRET, troubleshoot 401/403 responses, or pick the right Sigma API hostname for their cloud. Use as a prerequisite when another Sigma skill needs an SIGMA_API_TOKEN.
Sigma REST API Authentication
Authenticate against the Sigma Computing REST API and obtain a bearer token. This skill is a prerequisite for any skill that calls the Sigma API directly with curl.
curl, jq, and base64 must be available. curl and base64 ship with macOS and most Linux distros; jq usually does not — install with brew install jq (macOS) or apt install jq (Debian/Ubuntu).
Reference Index
| File | When to load |
|---|---|
| reference/browser-oauth-login.md | The user wants an interactive browser sign-in (OAuth authorization-code + PKCE) instead of a client ID/secret — the discovery-driven flow, code exchange, and encrypted refresh-token storage. |
Base URL Selection
The host depends on the user's Sigma cloud and region. Confirm with the user before exporting. The user can also look up their base URL in Administration → Developer Access in the Sigma app.
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.
- 5d ago First seen · 148 lines · 103 tokens per session scan A 8f6e15190b93
sigma-api is a cursor rule published in the GitHub repository twells89/sigma-migration-skills (14 stars, last pushed yesterday), licensed MIT. It adds 103 tokens to every session and 2,396 once invoked, about $0.0005 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 2026-08-30.
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