evo-citation-verifier

evo-citation-verifier is a skill for Claude Code, Codex from OpenLAIR/OpenSkill. It costs 47 tokens per session (290 once invoked), scanned A, original, Apache-2.0.

An academic citation checker that looks up papers through services such as Crossref, Semantic Scholar, DBLP, and DOI.org to see whether a citation exists.

In plain words
What is it for?
Use it to verify a citation by its DOI or title and obtain the lookup result.
Why use it?
It reduces the manual work of checking DOI links and searching several research databases. It also handles temporary request failures and limits request frequency.

Skill for Claude CodeCodex

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

Good fit Use it to verify a citation by its DOI or title and obtain the lookup result.

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Install with agentmods
npx agentmods add skills/openlair/openskill/evo-citation-verifier
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 OpenLAIR/OpenSkill --skill evo-citation-verifier
Clone the repo
git clone --depth 1 https://github.com/OpenLAIR/OpenSkill

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 evo-citation-verifier

README.md
[![agentmods](https://agentmods.dev/badge/skills/openlair/openskill/evo-citation-verifier/github.svg)](https://agentmods.dev/skills/openlair/openskill/evo-citation-verifier)
Your own site
<a href="https://agentmods.dev/skills/openlair/openskill/evo-citation-verifier"><img src="https://agentmods.dev/badge/skills/openlair/openskill/evo-citation-verifier/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 evo-citation-verifier

Your own site · 80×15
<a href="https://agentmods.dev/skills/openlair/openskill/evo-citation-verifier"><img src="https://agentmods.dev/badge/skills/openlair/openskill/evo-citation-verifier.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 290 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 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 $0.00047 $0.00290
Opus 5 $0.00023 $0.00145
Sonnet 5 $0.00009 $0.00058
Haiku 4.5 $0.00005 $0.00029

Measured today against content hash 477f02c69c04, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

evo-citation-verifier 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 today.

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

tasks-evolved/citation-check/environment/skills/evo-citation-verifier/SKILL.md · 31 lines

What it actually says

evo-citation-verifier

Verifies citations against academic APIs.

Key Functions

  • get_robust_session() - Create requests session with retry/backoff
  • verify_doi_exists(doi, session) - Check if DOI resolves via CrossRef
  • query_crossref(title, session) - Search CrossRef by title
  • query_semantic_scholar(title, session) - Search Semantic Scholar
  • query_dblp(title, session) - Search DBLP
  • verify_citation(citation, session) - Full verification pipeline for one citation
  • rate_limited_query(session, url, params, headers, delay) - Rate-limited GET

Usage

import sys
sys.path.insert(0, '/app/environment/skills/evo-citation-verifier/scripts')
from utils import get_robust_session, verify_citation, verify_doi_exists

session = get_robust_session()
result = verify_citation({'title': 'Some Paper', 'doi': '10.1234/fake'}, session)
print(result['doi_exists'])  # False for fake DOIs
Files

What ships with it

1 file 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. today First seen · 31 lines · 47 tokens per session scan A 477f02c69c04

Subscribe to this mod's changes

evo-citation-verifier is a skill published in the GitHub repository OpenLAIR/OpenSkill (88 stars, last pushed yesterday), licensed Apache-2.0. It adds 47 tokens to every session and 290 once invoked, about $0.0002 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 2026-09-11.