What is vercel-functions-runtime?

A guide to Vercel Functions and Edge Runtime, which run server-side code without managing your own servers. It also covers scheduled jobs and request middleware.

Use it to create serverless APIs, choose Node or Edge execution, schedule cron jobs, use environment variables, and control requests with middleware.

It helps you build APIs, background tasks, and request handling that run on Vercel's infrastructure and, when needed, closer to users.

vercel-functions-runtime — Skill for Claude Code by bobmatnyc

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.

Any agent

npx skills add bobmatnyc/claude-mpm-skills --skill vercel-functions-runtime

Clone the repo

git clone --depth 1 https://github.com/bobmatnyc/claude-mpm-skills

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/bobmatnyc/claude-mpm-skills/vercel-functions-runtime/github.svg)](https://agentmods.dev/skills/bobmatnyc/claude-mpm-skills/vercel-functions-runtime)

Your own site

<a href="https://agentmods.dev/skills/bobmatnyc/claude-mpm-skills/vercel-functions-runtime"><img src="https://agentmods.dev/badge/skills/bobmatnyc/claude-mpm-skills/vercel-functions-runtime/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/bobmatnyc/claude-mpm-skills/vercel-functions-runtime"><img src="https://agentmods.dev/badge/skills/bobmatnyc/claude-mpm-skills/vercel-functions-runtime.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 583 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00037	$0.00583
Opus 5	$0.00018	$0.00292
Sonnet 5	$0.00007	$0.00117
Haiku 4.5	$0.00004	$0.00058

Measured 9d ago against content hash bf484df81761, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

vercel-functions-runtime 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 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.

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.

toolchains/platforms/deployment/vercel-functions-runtime/SKILL.md · 74 lines

What it actually says

Vercel Functions and Runtime Skill

progressive_disclosure: entry_point: summary: "Vercel Functions and Edge Runtime: serverless APIs, edge execution, cron jobs, and routing middleware." when_to_use: - "When building API routes or serverless logic" - "When targeting the Edge Runtime" - "When scheduling tasks with cron jobs" quick_start: - "Create a function entry point" - "Choose the runtime (Node or Edge)" - "Configure cron schedules" - "Deploy and monitor" token_estimate: entry: 90-110 full: 3600-4700

Overview

Vercel Functions provide serverless execution for APIs and background tasks. The Edge Runtime enables low-latency execution closer to users.

Vercel Functions

Define serverless functions in the project structure.
Use environment variables for configuration.
Review logs for errors and performance.

Edge Runtime

Use the Edge Runtime for low-latency execution.
Validate compatibility with the Edge runtime constraints.

Cron Jobs

Schedule jobs with cron definitions.
Use cron for periodic maintenance tasks or sync jobs.

Routing and Middleware

Apply routing middleware for request handling.
Use headers, rewrites, and redirects to control traffic.

Complementary Skills

When using this skill, consider these related skills (if deployed):

vercel-deployments-builds: Deployment workflow and release controls.
vercel-networking-domains: Routing, headers, and edge caching.
vercel-observability: Logs and tracing for function debugging.

Note: Complementary skills are optional. This skill is fully functional without them.

Resources

Vercel Docs:

Functions: https://vercel.com/docs/functions
Edge Runtime: https://vercel.com/docs/functions/runtimes/edge
Cron Jobs: https://vercel.com/docs/cron-jobs
Routing Middleware: https://vercel.com/docs/routing-middleware

Files

What ships with it

1 file 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.

metadata.json 471 B

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.

9d ago First seen · 74 lines · 37 tokens per session scan A bf484df81761

Subscribe to this mod's changes

vercel-functions-runtime is a skill published in the GitHub repository bobmatnyc/claude-mpm-skills (75 stars, last pushed 1mo ago), licensed MIT. It adds 37 tokens to every session and 583 once invoked, about $0.0002 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 2026-09-03.

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