jina

jina is a cursor rule for Cursor from basher83/lunar-claude. It costs 1,586 tokens per session, scanned A, original, MIT.

A rule requiring Jina tools for web research and verification when information is uncertain or an answer is challenged. Jina provides web, academic-paper, and image search and reading tools.

In plain words
What is it for?
Use it to search the web or arXiv, find images, expand search queries, read sources in parallel, and remove duplicate results.
Why use it?
It gives the agent a defined way to check current or disputed information instead of relying on memory.

Cursor rule for Cursor

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.

agentmods
npx agentmods add rules/basher83/lunar-claude/jina
Clone the repo
git clone --depth 1 https://github.com/basher83/lunar-claude

Made for: Cursor.

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 jina

README.md
[![agentmods](https://agentmods.dev/badge/rules/basher83/lunar-claude/jina.svg)](https://agentmods.dev/rules/basher83/lunar-claude/jina)
Your own site
<a href="https://agentmods.dev/rules/basher83/lunar-claude/jina"><img src="https://agentmods.dev/badge/rules/basher83/lunar-claude/jina.svg" alt="Measured on agentmods" height="20"></a>
Per session 1,586 This file is loaded in full into every session.
When invoked 1,586 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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 $0.01586 $0.01586
Opus 5 $0.00793 $0.00793
Sonnet 5 $0.00317 $0.00317
Haiku 4.5 $0.00159 $0.00159

Measured 5d ago against content hash c9859cece5a3, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

jina 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 5d 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.

.cursor/rules/jina.mdc · 179 lines

How it starts

The opening of the file, as written. The whole thing — 179 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Jina MCP Tools Usage Rules

Always Use Jina MCP Tools for Research and Verification

When you are uncertain about knowledge, or the user doubts your answer, always use Jina MCP tools to search and read best practices and latest information.

Why Use Jina MCP Tools

  1. Up-to-date information: Access current web content and academic papers
  2. Comprehensive search: Search web, academic papers (arXiv), and images
  3. Efficient reading: Parallel reading capabilities for multiple sources
  4. Quality sources: Access academic papers and verified web content
  5. Deduplication: Built-in tools to remove duplicate content

Available Jina MCP Tools

Search Tools

  • mcp_jina-mcp-server_search_web - Search the web for current information, news, articles
  • mcp_jina-mcp-server_search_arxiv - Search academic papers and preprints on arXiv
  • mcp_jina-mcp-server_search_images - Search for images across the web
  • mcp_jina-mcp-server_parallel_search_web - Run multiple web searches in parallel
  • mcp_jina-mcp-server_parallel_search_arxiv - Run multiple arXiv searches in parallel
  • mcp_jina-mcp-server_expand_query - Expand and rewrite search queries for better results

Reading Tools

  • mcp_jina-mcp-server_read_url - Extract and convert web page content to markdown
  • mcp_jina-mcp-server_parallel_read_url - Read multiple web pages in parallel
  • mcp_jina-mcp-server_capture_screenshot_url - Capture screenshots of web pages
  • mcp_jina-mcp-server_guess_datetime_url - Guess last updated/published datetime

Utility Tools

  • mcp_jina-mcp-server_sort_by_relevance - Rerank documents by relevance to a query
  • mcp_jina-mcp-server_deduplicate_strings - Get top-k semantically unique strings
  • mcp_jina-mcp-server_deduplicate_images - Get top-k semantically unique images

Critical Rule: Search Must Be Complemented with Read

NEVER use search tools alone. Every search must be complemented with read_url or parallel_read_url to read the source URL content.

Read the full file on GitHub · 179 lines

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. 5d ago First seen · 179 lines · 1,586 tokens per session scan A c9859cece5a3

Subscribe to this mod's changes

jina is a cursor rule published in the GitHub repository basher83/lunar-claude (22 stars, last pushed yesterday), licensed MIT. It adds 1,586 tokens to every session, about $0.0079 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.