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merge-port

merge-port is a skill for Claude Code from anivaryam/anivaryam-plugins. It costs 153 tokens per session (1,699 once invoked), scanned A, original, MIT.

A local reverse proxy that puts a frontend and one or more backend services behind a single port and URL. It routes requests by path, such as `/api` or `/auth`.

In plain words
What is it for?
Use it to combine frontend and backend servers locally, route multiple backends by URL prefix, expose one port through a tunnel, or provide one container entrypoint port.
Why use it?
It removes the need to expose and manage separate development ports or tunnel endpoints. It also lets services share one origin, which helps with browser cookies, requests, and WebSockets.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the merge-port plugin — 1 skill, 2 commands, 1 agent shipped together

not rated 2repo 5mo ago A scan 153 tokens original MIT

Good fit Use it to combine frontend and backend servers locally, route multiple backends by URL prefix, expose one port through a tunnel, or provide one container entrypoint port.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/anivaryam/anivaryam-plugins/merge-port
View source ↗ anivaryam/anivaryam-plugins
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 anivaryam/anivaryam-plugins --skill merge-port
Clone the repo
git clone --depth 1 https://github.com/anivaryam/anivaryam-plugins

Made for: Claude Code.

Or install merge-port, the plugin that ships this one along with the rest of its 1 skill, 2 commands, 1 agent.

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.

agentmods badge for merge-port

README.md
[![agentmods](https://agentmods.dev/badge/skills/anivaryam/anivaryam-plugins/merge-port/github.svg)](https://agentmods.dev/skills/anivaryam/anivaryam-plugins/merge-port)
Your own site
<a href="https://agentmods.dev/skills/anivaryam/anivaryam-plugins/merge-port"><img src="https://agentmods.dev/badge/skills/anivaryam/anivaryam-plugins/merge-port/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.

agentmods 80×15 button for merge-port

Your own site · 80×15
<a href="https://agentmods.dev/skills/anivaryam/anivaryam-plugins/merge-port"><img src="https://agentmods.dev/badge/skills/anivaryam/anivaryam-plugins/merge-port.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 153 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,699 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00153 $0.01699
Opus 5.5 $0.00061 $0.00680
Sonnet 5.5 $0.00031 $0.00340
Haiku 4.5 $0.00015 $0.00170

Measured 2mo ago against content hash a416107d0ddd, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

merge-port 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 2mo 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 -sf http://localhost:8080/_health # liveness
plugins/merge-port/skills/merge-port/SKILL.md · 154 lines

How it starts

The opening of the file, as written. The whole thing — 154 lines — stays where its author put it; the contents beside it link to each section on GitHub.

merge-port

Local reverse proxy. Two upstreams (or many), one listen port. Pure path routing — no containers, no DNS, no TLS termination.

Repo: github.com/anivaryam/merge-port. Binary: merge-port (install via brokit install merge-port, go install, or release tarball).

When to reach for it

  • Frontend (5173) + backend (3001) → one URL (e.g. :8080) so cookies, fetches, and WebSockets share an origin.
  • Tunnel a single port instead of two.
  • Container entrypoint that must serve everything on $PORT.
  • Multiple backends behind one origin (/api → 3001, /auth → 3002, / → 3000).

Do NOT use for: TLS termination (put a real LB in front), production load balancing across hosts, sticky sessions, or anything that needs request rewriting beyond prefix-based routing.

Two modes

Simple mode

merge-port --client 5173 --server 3001 --port 8080
  • /api/* → server (3001)
  • everything else → client (5173)

Repeatable --api-prefix to add more server routes:

merge-port --client 5173 --server 3001 \
  --api-prefix /api --api-prefix /auth --api-prefix /uploads

Route mode

Multiple backends, explicit prefixes:

merge-port --route /api=3001 --route /auth=3002 --route /=3000

Target accepts: bare port (3001), host:port, or full URL (http://admin.local:4000).

Route mode is exclusive with --client/--server/--api-prefix. Pick one form.

Add /=... as catch-all in route mode if you want frontend fallback — without it, unmatched paths return 404.

Routing rule: longest prefix wins. WebSockets pass through transparently (the proxy honours upgrade frames).

Config files

merge-port init                                # writes .merge-port.yaml in cwd
merge-port init --client 5173 --server 3001 --dry-run

Simple mode YAML:

port: 8080
client: 3000
server: 3001
api_prefixes:
  - /api
  - /auth

Route mode YAML:

port: 8080
routes:
  - prefix: /api
    target: "3001"
  - prefix: /
    target: "5173"

Read the full file on GitHub · 154 lines

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. 2mo ago First seen · 154 lines · 0 tokens per session scan A a416107d0ddd

Subscribe to this mod's changes

merge-port is a skill published in the GitHub repository anivaryam/anivaryam-plugins (2 stars, last pushed 5mo ago), licensed MIT. It adds 153 tokens to every session and 1,699 once invoked, about $0.0006 per session on Opus 5.5. 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 2026-08-31.

Backend and APIsDevOps and cloud
Related

merge-port compared with skills from other repositories

merge-port next to 6 skills from other repositories
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merge-portanivaryam/anivaryam-pluginsSkill25mo agoMITA153Claude Code
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