mcp-oauth-remote-gateway

mcp-oauth-remote-gateway is a skill for Claude Code, Codex from GGbond-bo/MemOmics-Agent. It costs 20 tokens per session (5,943 once invoked), scanned A, a copy of mcp-oauth-remote-gateway, MIT.

A procedure for signing in to remote MCP servers from a headless gateway, such as a container or VPS. MCP servers provide tools to an AI agent, while OAuth is a browser-based permission process.

In plain words
What is it for?
Use it to complete OAuth with PKCE, save the resulting tokens where Hermes expects them, and let a later MCP reload use the cached login.
Why use it?
It fixes the redirect problem that occurs when a browser on your computer cannot reach a gateway running elsewhere.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to complete OAuth with PKCE, save the resulting tokens where Hermes expects them, and let a later MCP reload use the cached login.

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Install with agentmods
npx agentmods add skills/ggbond-bo/memomics-agent/mcp-oauth-remote-gateway
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 GGbond-bo/MemOmics-Agent --skill mcp-oauth-remote-gateway
Clone the repo
git clone --depth 1 https://github.com/GGbond-bo/MemOmics-Agent

Made for: Claude Code, Codex.

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 mcp-oauth-remote-gateway

README.md
[![agentmods](https://agentmods.dev/badge/skills/ggbond-bo/memomics-agent/mcp-oauth-remote-gateway/github.svg)](https://agentmods.dev/skills/ggbond-bo/memomics-agent/mcp-oauth-remote-gateway)
Your own site
<a href="https://agentmods.dev/skills/ggbond-bo/memomics-agent/mcp-oauth-remote-gateway"><img src="https://agentmods.dev/badge/skills/ggbond-bo/memomics-agent/mcp-oauth-remote-gateway/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 mcp-oauth-remote-gateway

Your own site · 80×15
<a href="https://agentmods.dev/skills/ggbond-bo/memomics-agent/mcp-oauth-remote-gateway"><img src="https://agentmods.dev/badge/skills/ggbond-bo/memomics-agent/mcp-oauth-remote-gateway.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 20 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,943 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 97% 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 5.1 $0.00020 $0.05943
Opus 5 $0.00010 $0.02972
Sonnet 5 $0.00004 $0.01189
Haiku 4.5 $0.00002 $0.00594

Measured 11d ago against content hash 063f7b9e4877, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

mcp-oauth-remote-gateway 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 11d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/diagnose-oauth-mcp.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

login-gated; a cookieless curl returning 401/302 confirms they exist).
Origin

This is a copy

97% identical to mcp-oauth-remote-gateway — 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.

hermes-agent/optional-skills/mcp/mcp-oauth-remote-gateway/SKILL.md · 372 lines

How it starts

The opening of the file, as written. The whole thing — 372 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MCP OAuth on a Remote Hermes Gateway

Overview

Hermes' built-in MCP OAuth client runs a one-shot HTTP listener on 127.0.0.1:<port> inside the Hermes process and registers that loopback address as the OAuth redirect_uri. That works perfectly for a local CLI on the user's own machine. It breaks completely when Hermes runs as a remote gateway (container, VPS, messaging bot), because the user's browser resolves 127.0.0.1 to the user's own laptop, not the remote container — so the authorization code never reaches Hermes.

This skill does the OAuth dance by hand and writes the resulting tokens into the exact files Hermes' token storage expects, so a subsequent /reload-mcp finds cached tokens and skips the browser flow entirely.

When to Use

Use this skill when all of the following are true:

  1. The user wants to add a remote HTTP MCP server that requires OAuth (not a static Bearer token).
  2. Hermes is running as a remote gateway (container, VPS, Docker, managed service) — NOT a local CLI on the user's laptop.
  3. The server supports OAuth 2.1 with PKCE and RFC 7591 Dynamic Client Registration (most modern MCP servers do — Better Stack, Linear, Cloudflare, Datadog, etc.). If it doesn't support DCR (GitHub is the notable exception), this skill does not apply — use a pre-registered OAuth App or a Personal Access Token instead.

Do NOT use this for:

  • Local CLI Hermes — just set auth: oauth in mcp_servers.<name> and /reload-mcp. The built-in flow opens a browser and captures the callback on localhost. Works perfectly.
  • Servers that accept a static Bearer token (API key) — always prefer headers.Authorization: "Bearer <token>" when the user is willing. Simpler, no refresh dance.
  • GitHub Copilot MCP (api.githubcopilot.com/mcp/) — GitHub does not expose DCR. Use a PAT or a pre-registered OAuth App (see pitfall 12).

Why the Built-in OAuth Flow Fails on a Remote Gateway

Hermes' native MCP OAuth client (tools/mcp_oauth.py):

  1. Picks a free local port P.
  2. Registers a dynamic OAuth client with the AS, sending redirect_uri = http://127.0.0.1:P/callback.
  3. Starts an HTTP server on 127.0.0.1:P inside the Hermes process.
  4. Prints the authorize URL and waits for the code at its local endpoint.

Read the full file on GitHub · 372 lines

Files

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.

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. 11d ago First seen · 372 lines · 20 tokens per session scan A 063f7b9e4877

Subscribe to this mod's changes

mcp-oauth-remote-gateway is a skill published in the GitHub repository GGbond-bo/MemOmics-Agent (19 stars, last pushed yesterday), licensed MIT. It adds 20 tokens to every session and 5,943 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 97% identical to mcp-oauth-remote-gateway, differing in 2 lines, and is treated as a copy.

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