azuresql-db-functions

A guide for building HTTP APIs and event-driven handlers with Azure Functions over a local Azure SQL Database container. Azure Functions runs small pieces of code in response to requests or events; SQL bindings connect that code to database data.

In plain words
What is it for?
Use it to build HTTP create, read, update, and delete endpoints, or run code when rows are inserted, updated, or deleted.
Why use it?
It reduces the database connection code needed for basic API operations and local reactions to row changes.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/microsoft/azure-sql-database-container/azuresql-db-functions
Any agent
npx skills add microsoft/azure-sql-database-container --skill azuresql-db-functions
Clone the repo
git clone --depth 1 https://github.com/microsoft/azure-sql-database-container

Made for: Claude Code, Codex.

Per session 175 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,546 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00175 $0.02546
Opus 5 $0.00088 $0.01273
Sonnet 5 $0.00035 $0.00509
Haiku 4.5 $0.00017 $0.00255

Measured 3d ago against content hash 7ef400a77684, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

azuresql-db-functions scanned grade A with 0 findings 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 3d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/azuresql-db-functions/SKILL.md · 201 lines

How it starts

The opening of the file, as written. The whole thing — 201 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Serverless API + event-driven on the Azure SQL Database container with Azure Functions

Build HTTP CRUD endpoints and change-driven handlers over the local Azure SQL Database container (Private Preview) using Azure Functions and the first-party Azure SQL bindings. Two capabilities:

  • API: HTTP-triggered functions with SQL input and output bindings (read and upsert with no ADO.NET boilerplate).
  • Event-driven (local): the SQL trigger binding fires a function when rows are inserted/updated/deleted. It is backed by Change Tracking, runs fully locally against the container, and needs no cloud services.

Event-driven note: Azure SQL Change Event Streaming (CES) is the cloud path for streaming row changes, and it cannot run against the local container (it is unsupported on the Linux engine and streams only to Azure Event Hubs public endpoints). Locally, use the SQL trigger below. See references/event-driven.md.

Load-bearing facts (inlined; full engine detail in azuresql-db-container)

  • This is the Azure SQL Database engine (Private Preview), not the SQL Server image mcr.microsoft.com/mssql/server. SERVERPROPERTY('EngineEdition') returns 5, SERVERPROPERTY('Edition') returns 'SQL Azure'.
  • Image: sqldbpreview-dpgaeqhmgphzd4bk.azurecr.io/azure-sql/db-dev:latest (x64, linux/amd64). Registry is private: sign in first with docker login sqldbpreview-dpgaeqhmgphzd4bk.azurecr.io using the shared pull-only credentials from https://aka.ms/sqldbcontainerpreview-signup (they may rotate). Registry and tag are provisional during Private Preview.
  • Required env: ACCEPT_EULA=Y and a complex MSSQL_SA_PASSWORD (8+ chars, upper/lower/digit/symbol). Engine listens on 1433.
  • The engine does NOT auto-create databases. Run CREATE DATABASE appdb on a master connection before the function app connects with Database=appdb. Do not use USE to switch databases; select it in the connection string.
  • On a non-x64 host add --platform linux/amd64.

Read the full file on GitHub · 201 lines

Files

What ships with it

3 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.

Changes

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.

  1. 3d ago First seen · 201 lines · 175 tokens per session scan A 7ef400a77684

Subscribe to this mod's changes

azuresql-db-functions is a skill published in the GitHub repository microsoft/azure-sql-database-container (16 stars, last pushed yesterday), licensed MIT. It adds 175 tokens to every session and 2,546 once invoked, about $0.0009 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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