A command-line interface for discovering and calling remote services that publish machine-readable schemas. It can work with interfaces described by OpenAPI, GraphQL, gRPC, MCP, or JSON-RPC.

Use it to search service documentation, inspect operation schemas, authenticate where needed, and execute supported API or tool calls.

It gives agents one consistent way to inspect available operations, understand their inputs, and make calls with structured results. This reduces guesswork when working with unfamiliar remote systems.

uxc — Skill for Codex by holon-run

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 holon-run/uxc --skill uxc

Clone the repo

git clone --depth 1 https://github.com/holon-run/uxc

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/holon-run/uxc/uxc/github.svg)](https://agentmods.dev/skills/holon-run/uxc/uxc)

Your own site

<a href="https://agentmods.dev/skills/holon-run/uxc/uxc"><img src="https://agentmods.dev/badge/skills/holon-run/uxc/uxc/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/holon-run/uxc/uxc"><img src="https://agentmods.dev/badge/skills/holon-run/uxc/uxc.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,748 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. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

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	$0.00053	$0.01748
Opus 5	$0.00026	$0.00874
Sonnet 5	$0.00011	$0.00350
Haiku 4.5	$0.00005	$0.00175

Measured 7d ago against content hash dec1c51473d8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

uxc 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 7d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/validate.sh), 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.

curl -fsSL https://raw.githubusercontent.com/holon-run/uxc/main/scripts/install.sh -o install-uxc.sh

skills/uxc/SKILL.md · 177 lines

How it starts

The opening of the file, as written. The whole thing — 177 lines — stays where its author put it; the contents beside it link to each section on GitHub.

UXC Skill

Use this skill when a task requires calling a remote interface and the endpoint can expose machine-readable schema metadata.

When To Use

You need to call APIs/tools from another skill and want one consistent CLI workflow.
The interface may be OpenAPI, GraphQL, gRPC reflection, MCP, or JSON-RPC/OpenRPC.
You need deterministic, machine-readable output (ok, kind, data, error).

Do not use this skill for pure local file operations with no remote interface.

Docs Search & Support

UXC docs support full-text search at https://uxc.holon.run/api/search?q=<query>.
Prefer searching docs first when operation names, auth flags, or protocol behavior are unclear.
If docs are unclear or behavior looks wrong, open an issue in holon-run/uxc:
- https://github.com/holon-run/uxc/issues/new/choose
- include command, endpoint, and the JSON envelope (ok, error, meta) for faster triage.

Prerequisites

uxc is installed and available in PATH.
For gRPC runtime calls, grpcurl is installed and available in PATH.

Install uxc

Choose one of the following methods:

Homebrew (macOS/Linux):

brew tap holon-run/homebrew-tap
brew install uxc

Install Script (macOS/Linux, review before running):

curl -fsSL https://raw.githubusercontent.com/holon-run/uxc/main/scripts/install.sh -o install-uxc.sh
# Review the script before running it
less install-uxc.sh
bash install-uxc.sh

Cargo:

cargo install uxc

For more options, see the Installation section in the UXC README.

Core Workflow

Discover operations:
- uxc <host> -h
Inspect a specific operation:
- uxc <host> <operation> -h
Execute with structured input:
- uxc <host> <operation> key=value
- uxc <host> <operation> '<payload-json>'
Parse result as JSON envelope:
- Success: .ok == true, consume .data
- Failure: .ok == false, inspect .error.code and .error.message
For disambiguation, use operation-level help first:
- uxc <host> <operation> -h
For auth-protected endpoints, use the right auth track:
- simple bearer / single-secret API key: see references/auth-configuration.md
- multi-field auth or request signing: see references/auth-configuration.md
- OAuth flows: see references/oauth-and-binding.md

Read the full file on GitHub · 177 lines

Files

What ships with it

8 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.

7d ago First seen · 177 lines · 53 tokens per session scan A dec1c51473d8

Subscribe to this mod's changes

uxc is a skill published in the GitHub repository holon-run/uxc (113 stars, last pushed yesterday), licensed MIT. It adds 53 tokens to every session and 1,748 once invoked, about $0.0003 per session on Opus 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 2026-09-03.

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