render-web-services

A guide for deploying and running web applications on Render, a cloud hosting service. It explains how incoming traffic, HTTPS, health checks, domains, deploys, previews, and persistent storage work together.

In plain words
What is it for?
Use it to configure ports and TLS, add domains, set health checks, enable automatic deploys or pull-request previews, manage persistent disks, and troubleshoot deploys.
Why use it?
It helps diagnose deployments that fail because the application listens on the wrong port, health checks cannot reach it, domains are misconfigured, or deploy settings conflict.

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/render-oss/render-plugin-claude-code/render-web-services
Any agent
npx skills add render-oss/render-plugin-claude-code --skill render-web-services
Clone the repo
git clone --depth 1 https://github.com/render-oss/render-plugin-claude-code

Made for: Claude Code, Codex.

Per session 71 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,550 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 95% copy Near-identical to another mod 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 $0.00071 $0.01550
Opus 5 $0.00036 $0.00775
Sonnet 5 $0.00014 $0.00310
Haiku 4.5 $0.00007 $0.00155

Measured 2d ago against content hash 4ce0323558f5, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

render-web-services 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 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.

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.

Origin

This is a copy

95% identical to render-web-services — 2 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.

skills/render-web-services/SKILL.md · 116 lines

How it starts

The opening of the file, as written. The whole thing — 116 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Render Web Services

This skill covers Web Service behavior on Render: how traffic reaches your process, how deploys go live, and how optional features (domains, disks, auto-deploy) interact. Use it alongside Blueprint and networking skills when wiring render.yaml or Dashboard settings.

When to Use

  • Configuring or debugging port binding, PORT, or multi-port web services
  • TLS/HTTPS expectations at the edge vs inside the container
  • Health checks blocking or rolling back deploys
  • Custom domains, DNS, and certificate provisioning
  • Auto-deploy, CI-gated deploys, and PR preview generation
  • Persistent disks and their impact on scaling and zero-downtime
  • Deploy lifecycle: build, pre-deploy, swap, drain, rollback, shutdown delay

Deeper patterns live under references/ (health checks, domains, deploy phases).

Port Binding

  • Listen on 0.0.0.0 (all interfaces). Binding only to localhost or 127.0.0.1 prevents Render’s proxy from reaching your app.
  • Use the PORT environment variable for the HTTP listen port. Render sets it for you; the default is often 10000 and you can change the configured value in the service Settings in the Dashboard.
  • Reserved ports (do not bind your application to these for normal traffic): 18012, 18013, 19099.

Multi-port Web Services

  • Only one port receives public HTTP traffic: the port aligned with PORT.
  • Additional open ports are reachable on Render’s private network only (not from the public internet through the same public URL pattern).

TLS and HTTPS

  • TLS terminates at Render’s edge. The edge speaks HTTPS to clients; your process typically receives plain HTTP on PORT.
  • HTTPS redirect for clients is handled by the platform; users hitting HTTP are redirected appropriately at the edge.
  • Do not terminate TLS inside the app for the primary public listener unless you have a rare, explicit need—standard Web Services assume HTTP behind the proxy.

Read the full file on GitHub · 116 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. 2d ago First seen · 116 lines · 71 tokens per session scan A 4ce0323558f5

Subscribe to this mod's changes

render-web-services is a skill published in the GitHub repository render-oss/render-plugin-claude-code (0 stars, last pushed 13d ago), licensed MIT. It adds 71 tokens to every session and 1,550 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. It is 95% identical to render-web-services, differing in 2 lines, and is treated as a copy.

Related

Other skills, from other repositories

systematic-debugging

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.

obra/superpowers · 21 tokens

next-cache-components-adoption

Turn on Cache Components in a Next.js app and resolve the blocking routes it surfaces. Use when the user wants to enable, adopt, or migrate to Cache Components, flip the cacheComponents flag, work through a flood of blocking-prerender / instant validation errors, run the cache-components-instant-false codemod, or…

vercel/next.js · 95 tokens

babysit-pr

Babysit a GitHub pull request after creation by continuously polling review comments, CI checks/workflow runs, and mergeability state until the PR is merged/closed or user help is required. Diagnose failures, retry likely flaky failures up to 3 times, auto-fix/push branch-related issues when appropriate, and keep…

openai/codex · 114 tokens

imagegen

Generate or edit raster images when the task benefits from AI-created bitmap visuals such as photos, illustrations, textures, sprites, mockups, or transparent-background cutouts. Use when Codex should create a brand-new image, transform an existing image, or derive visual variants from references, and the output…

openai/codex · 113 tokens

cpu-profile-analysis

Analyze V8/Chrome CPU profiles (.cpuprofile) and DevTools trace files (Trace-.json). Use when: profiling performance, investigating slow functions, comparing code paths, finding bottlenecks, analyzing timeToRequest, understanding call trees from sampling profiler data, analyzing layout/paint/rendering, investigating…

microsoft/vscode · 71 tokens

next-cache-components-optimizer

Drive a Next.js route to instant navigation by setting up an agentic loop, under Cache Components / PPR, on initial load (hard navigation) and client-side navigation (soft navigation). Encode the goal as a failing @next/playwright instant() e2e and work it to green, one verified route at a time; the shipped test then…

vercel/next.js · 170 tokens