What is openevidence?

A command-line client for OpenEvidence, a clinical evidence assistant used to ask medical questions and retrieve evidence. It can check login status, list question history, fetch articles, and submit questions.

Use it to verify authentication, search past questions, retrieve an article by its identifier, or ask a new clinical evidence question.

It provides access to those OpenEvidence tasks without requiring a separate MCP server. Each command returns structured JSON and can save article or question results as files.

openevidence — Skill for Claude Code and Codex by htlin222

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 htlin222/openevidence-mcp --skill openevidence-skill

Clone the repo

git clone --depth 1 https://github.com/htlin222/openevidence-mcp

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/htlin222/openevidence-mcp/openevidence-skill/github.svg)](https://agentmods.dev/skills/htlin222/openevidence-mcp/openevidence-skill)

Your own site

<a href="https://agentmods.dev/skills/htlin222/openevidence-mcp/openevidence-skill"><img src="https://agentmods.dev/badge/skills/htlin222/openevidence-mcp/openevidence-skill/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/htlin222/openevidence-mcp/openevidence-skill"><img src="https://agentmods.dev/badge/skills/htlin222/openevidence-mcp/openevidence-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 111 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,338 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. 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	$0.00111	$0.01338
Opus 5	$0.00056	$0.00669
Sonnet 5	$0.00022	$0.00268
Haiku 4.5	$0.00011	$0.00134

Measured 11d ago against content hash d40bb646641b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

openevidence 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 11d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/oe.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.

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.

openevidence-skill/SKILL.md · 96 lines

How it starts

The opening of the file, as written. The whole thing — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OpenEvidence (portable)

A stdlib-only Python port of openevidence-mcp. One CLI (scripts/oe.py) with four subcommands matching the MCP tools.

MCP tool	Skill command	Purpose
`oe_auth_status`	`python3 scripts/oe.py auth-status`	Confirm `cookies.json` still authenticates `/api/auth/me`
`oe_history_list`	`python3 scripts/oe.py history`	Paginated question history with optional search
`oe_article_get`	`python3 scripts/oe.py article <uuid>`	Fetch an article, extract answer + figures, save artifacts
`oe_ask`	`python3 scripts/oe.py ask "<question>"`	Submit a new question, optionally wait, save artifacts

Output of every command is a single JSON object on stdout - same shape the MCP returns to its client.

Setup (one time)

Cookies. Export the OpenEvidence cookies from a logged-in browser tab (e.g. "Cookie-Editor" extension → "Export → JSON"). Save as cookies.json next to this SKILL.md. The format is either a flat array of cookie objects or { "cookies": [...] } (Playwright storage state). The file is gitignored.
Verify. python3 scripts/oe.py auth-status should print "authenticated": true. Status 401/403 means the cookies expired - re-export.

Cookie lookup order: $OE_COOKIES, ./cookies.json, the skill folder, ~/.openevidence/cookies.json.

Common workflows

Ask a question, wait for completion, save artifacts (the default):

python3 scripts/oe.py ask "First-line therapy for adult community-acquired pneumonia in a hospitalized patient"

Note: behavior differs from the MCP tool. The MCP oe_ask is now fire-and-forget by default (returns a pending article_id; pass wait_for_completion:true to block, or fetch later via oe_article_get). THIS portable CLI waits by default — override with --no-wait.

Read the full file on GitHub · 96 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.

11d ago First seen · 96 lines · 111 tokens per session scan A d40bb646641b

Subscribe to this mod's changes

openevidence is a skill published in the GitHub repository htlin222/openevidence-mcp (72 stars, last pushed 2d ago), licensed Apache-2.0. It adds 111 tokens to every session and 1,338 once invoked, about $0.0006 per session on Opus 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 2026-08-30.

Claude Code Research Scientific bibtex codex-cli crossref gemini-cli mcp

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