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 skills/microsoft/agents/agents-sdk-typescriptnpx skills add microsoft/Agents --skill agents-sdk-typescriptgit clone --depth 1 https://github.com/microsoft/AgentsWhat 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 | $0.00111 | $0.04430 |
| Opus 5 | $0.00056 | $0.02215 |
| Sonnet 5 | $0.00022 | $0.00886 |
| Haiku 4.5 | $0.00011 | $0.00443 |
Grade A, and why
agents-sdk-typescript 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 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s -X POST \ How it starts
The opening of the file, as written. The whole thing — 504 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Overview
The Microsoft 365 Agents SDK builds multichannel agents for Teams, Copilot Studio, and web chat.
| Package | Purpose |
|---|---|
@microsoft/agents-hosting |
Core: AgentApplication, CloudAdapter, TurnContext, TurnState, storage |
@microsoft/agents-hosting-express |
startServer() convenience wrapper |
@microsoft/agents-hosting-storage-blob |
Azure Blob Storage backend |
@microsoft/agents-hosting-storage-cosmos |
CosmosDB backend |
@microsoft/agents-hosting-dialogs |
Dialog system |
Requires Node 18+. Use node --env-file .env (Node 20+) to load environment variables.
Azure Resources Required
Microsoft Entra App Registration
clientId— Application (client) IDclientSecret— Certificates & secretstenantId— Directory (tenant) ID
Azure Bot Resource
- Messaging endpoint:
https://<your-host>/api/messages - Microsoft App ID must match
clientId
Local dev: Use Bot Framework Emulator. No Azure Bot needed until deployment. Leave clientId blank to skip auth validation.
Environment Variables
Modern format (recommended)
Uses connections__ and connectionsMap__ prefixes. Double underscores (__) separate path segments; .settings. is stripped automatically.
Single connection (most common):
connections__serviceConnection__settings__clientId=<your-app-id>
connections__serviceConnection__settings__clientSecret=<your-secret>
connections__serviceConnection__settings__tenantId=<your-tenant-id>
connectionsMap__0__connection=serviceConnection
connectionsMap__0__serviceUrl=*
How connectionsMap works:
Each entry maps a serviceUrl pattern to a named connection. The first matching entry wins.
serviceUrl=*— matches any service URL (use as the default/fallback)serviceUrlis treated as a regex for all other values
connectionsMap can be omitted when there is only one connection — the SDK defaults it to serviceUrl=*.
Multiple connections (e.g. different identities for different channels):
connections__mainConn__settings__clientId=<app-id-1>
connections__mainConn__settings__clientSecret=<secret-1>
connections__mainConn__settings__tenantId=<tenant-id>
connections__teamsConn__settings__clientId=<app-id-2>
connections__teamsConn__settings__clientSecret=<secret-2>
connections__teamsConn__settings__tenantId=<tenant-id>
connectionsMap__0__connection=teamsConn
connectionsMap__0__serviceUrl=https://smba.trafficmanager.net/.*
connectionsMap__1__connection=mainConn
connectionsMap__1__serviceUrl=*
What ships with it
2 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.
- 2d ago First seen · 504 lines · 111 tokens per session scan A 53ff3920281d
agents-sdk-typescript is a skill published in the GitHub repository microsoft/Agents (1,050 stars, last pushed 5d ago), licensed MIT. It adds 111 tokens to every session and 4,430 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 2026-08-30.
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