What is build-grok-oauth-mcp?

A skill for building and checking MCP tool servers that Grok can connect to over the web using browser-based OAuth sign-in. OAuth is a standard way to let an app access an account without sharing its password.

Creating Streamable HTTP MCP servers, configuring OAuth discovery and login, restricting client registration, and validating PKCE-based authorisation and refresh tokens.

It addresses the setup and debugging work needed when a Grok connector must securely discover, authorise, and refresh access to an MCP server.

build-grok-oauth-mcp — Skill for Codex by v1xingyue/my-example-mcp

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 v1xingyue/my-example-mcp --skill build-grok-oauth-mcp

Clone the repo

git clone --depth 1 https://github.com/v1xingyue/my-example-mcp

Made for: 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/v1xingyue/my-example-mcp/build-grok-oauth-mcp/github.svg)](https://agentmods.dev/skills/v1xingyue/my-example-mcp/build-grok-oauth-mcp)

Your own site

<a href="https://agentmods.dev/skills/v1xingyue/my-example-mcp/build-grok-oauth-mcp"><img src="https://agentmods.dev/badge/skills/v1xingyue/my-example-mcp/build-grok-oauth-mcp/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/v1xingyue/my-example-mcp/build-grok-oauth-mcp"><img src="https://agentmods.dev/badge/skills/v1xingyue/my-example-mcp/build-grok-oauth-mcp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 83 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,214 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 unknown 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	$0.00083	$0.01214
Opus 5.5	$0.00033	$0.00486
Sonnet 5.5	$0.00017	$0.00243
Haiku 4.5	$0.00008	$0.00121

Measured 2mo ago against content hash cc777164ca76, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

build-grok-oauth-mcp 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 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.

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/build-grok-oauth-mcp/SKILL.md · 103 lines

The source is not reproduced here

No licence file

Read it on GitHub

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.

2mo ago First seen · 103 lines · 83 tokens per session scan A cc777164ca76

Subscribe to this mod's changes

build-grok-oauth-mcp is a skill published in the GitHub repository v1xingyue/my-example-mcp (0 stars, last pushed 3mo ago), with no licence file. It adds 83 tokens to every session and 1,214 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-08-31.

Building agents

build-grok-oauth-mcp next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
build-grok-oauth-mcpv1xingyue/my-example-mcp	Skill	0	3mo ago	none	A	83	Codex
imagegenopenai/codex	Skill	134k	today	Apache-2.0	A	113	Codex
playwright-climicrosoft/playwright	Skill	100k	today	Apache-2.0	A	19	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	3d ago	MIT	A	200	Claude Code, Codex
browser-automationopenclaw/openclaw	Skill	394k	today	MIT	A	36	Claude Code
systematic-debuggingobra/superpowers	Skill	315k	6d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	today	MIT	A	95	Claude Code