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 sinch/sinch-plugins --skill sinch-functions-nodegit clone --depth 1 https://github.com/sinch/sinch-pluginsWrote 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/sinch/sinch-plugins/sinch-functions-node)<a href="https://agentmods.dev/skills/sinch/sinch-plugins/sinch-functions-node"><img src="https://agentmods.dev/badge/skills/sinch/sinch-plugins/sinch-functions-node/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/sinch/sinch-plugins/sinch-functions-node"><img src="https://agentmods.dev/badge/skills/sinch/sinch-plugins/sinch-functions-node.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 | $0.00084 | $0.07018 |
| Opus 5.5 | $0.00034 | $0.02807 |
| Sonnet 5.5 | $0.00017 | $0.01404 |
| Haiku 4.5 | $0.00008 | $0.00702 |
Grade A, and why
sinch-functions-node 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 8d 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.
Credentials are your project's API key and secret, injected automatically as `PROJECT_ID_API_KEY` and `PROJECT_ID_API_SECRET` — no setup required; export `ADMIN_USER`/`ADMIN_PASSWORD` as a second variable/secret pair to This is a copy
100% identical to sinch-functions-node — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 386 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Sinch Functions — Node.js Runtime
Overview
Sinch Functions is in beta: free during the beta period, and the API may change before general availability.
Package: @sinch/functions-runtime (npm). Write TypeScript/JavaScript functions that answer phone calls, handle conversation webhooks, and serve custom HTTP endpoints.
Voice API v2 is what context.voice is and what a new function is written against. The unversioned name always means the current API: context.voice is v2. The v2 sections below lead this skill because developers.sinch.com does not yet have a Functions-on-v2 page. Existing Voice v1 functions keep running unchanged; see Voice v1 callbacks.
Related skills:
sinch-functions— platform overview, concepts, runtime choicesinch-cli— terminal commands (sinch functions dev,sinch functions deploy, etc.)- Voice API v2 is covered by the
sinch-voice-api-v2skill; load it for the REST contract, SVAML v2 commands, and service configuration. sinch-functions-dotnet— the same concepts in C#
Agent Instructions
Policy gate
sinch-shared-policy@5(sha256:4864cf0fa8d6): The policy digest below is binding as written. Before implementation or live execution, read the full shared Sinch policy once per conversation — skip it if this exact ID/version/fingerprint is already loaded; read it if the version is newer or the fingerprint differs. This skill's canonical operation routes live in its Agent Instructions and Links sections.
Sinch policy digest (binding):
- Load the shared policy once per conversation; skip duplicate copies bearing the same ID/version/fingerprint.
- Infer product, language, region, and environment from the request and workspace; ask one combined question only for true blockers. Prefer the official Sinch SDK unless the request or workspace decides otherwise or no official SDK covers the language or operation.
- Code-generation approval is not execution approval. Classify every operation (read-only / reversible / billable / destructive) and obtain explicit approval before billable or destructive calls.
- Tier B facts — endpoint paths, methods, field names, enums, limits, webhook payloads, signature algorithms, SDK signatures — require fetching the exact canonical document in the current session before use.
- Bundled scripts, references, and examples are Tier C: illustrations, never schema authority. Never promote example values to production defaults.
- If a route is unresolved or a canonical fetch fails, climb the resolution ladder in order — re-search already-fetched documents (raw, not summarized), consult https://developers.sinch.com/llms.txt, follow first-party links, retry once — before failing closed. Never pattern-guess a documentation URL; never substitute memory, search snippets, or bundled files.
- Keep an evidence ledger mapping each fetched source to the fields and claims it authorized.
- Bound all polling and retries (backoff, jitter, hard cap); check state before retrying billable or destructive operations; report a timeout as unknown, not failed.
- Report verification levels separately (lint → unit → mock contract → sandbox → live → end-to-end); an HTTP 2xx does not prove delivery. State the levels not performed.
- Load only the smallest skill set that owns the behavior; if a required skill is unavailable, name it and stop rather than improvising its instructions.
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 8d ago First seen · 386 lines · 84 tokens per session scan A 112ff4c8d745
sinch-functions-node is a skill published in the GitHub repository sinch/sinch-plugins (6 stars, last pushed 8d ago), licensed Apache-2.0. It adds 84 tokens to every session and 7,018 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). It is 100% identical to sinch-functions-node, differing in 0 lines, and is treated as a copy.
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