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.
npx agentmods add instructions/post-crawl/mcp/claude-mdgit clone --depth 1 https://github.com/post-crawl/mcpWrote 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.
[](https://agentmods.dev/instructions/post-crawl/mcp/claude-md)<a href="https://agentmods.dev/instructions/post-crawl/mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/post-crawl/mcp/claude-md.svg" alt="Measured on agentmods" height="20"></a>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 | $0.01259 | $0.01259 |
| Opus 5 | $0.00629 | $0.00629 |
| Sonnet 5 | $0.00252 | $0.00252 |
| Haiku 4.5 | $0.00126 | $0.00126 |
Grade A, and why
mcp CLAUDE.md 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 3d 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.
How it starts
The opening of the file, as written. The whole thing — 170 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PostCrawl MCP Server Development Guide
Overview
This is a Model Context Protocol (MCP) server implementation for PostCrawl, providing AI assistants with tools to search and extract content from social media platforms (Reddit and TikTok). Built on Cloudflare Workers with Hono framework.
Architecture
- Hono: Web framework for routing and middleware
- MCP SDK: Protocol implementation for AI tool integration
- Zod: Runtime validation for tool parameters
- PostCrawl Client: Internal API client for PostCrawl services
Key Technologies
- Cloudflare Workers: Serverless execution environment
- TypeScript: Full type safety with strict mode
- @post-crawl/extraction-schemas: Shared types for extraction and search operations
Authentication Flow
- MCP client sends Bearer token in Authorization header
- Token is extracted and validated in request handlers
- Token is passed to PostCrawl API for authentication
- Errors return appropriate JSON-RPC error responses
Tool Schemas
All tools use Zod schemas for parameter validation:
socialPlatformSchema: Enum of supported platforms (reddit, tiktok)responseModeSchema: Enum of response formats (raw, markdown)- Parameters are validated before API calls
- Important: Tool parameters use snake_case (e.g.,
social_platforms,include_comments,response_mode) to match API expectations
Available Tools
search
Search across social media platforms.
- Input: query, page, results, social_platforms[]
- Output: Array of search results with title, url, snippet, date (formatted string), imageUrl
- Note: Dates are returned as formatted strings (e.g., "Dec 28, 2024")
search_and_extract
Combined search and content extraction.
- Input: Same as search + response_mode, include_comments
- Output: Array of extracted posts
extract
Extract content from specific URLs.
- Input: urls[], response_mode, include_comments
- Output: Array of posts with content
check_health
Health check for PostCrawl API.
- No parameters required
- Returns API status
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.
- 3d ago First seen · 170 lines · 1,259 tokens per session scan A 2eab284b7801
mcp CLAUDE.md is an instructions file published in the GitHub repository post-crawl/mcp (0 stars, last pushed 1y ago), licensed MIT. It adds 1,259 tokens to every session, about $0.0063 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 2026-08-31.
Other instructions, from other repositories
Browser4 CLAUDE.md
Claude Code instructions for platonai/Browser4, covering browser4 — project context for claude, architecture, key dispatch chain (cli → browser), batch commands and e2e test structure.
fix-quera AGENTS.md
Instructions for AlirezaKeshavarz83/fix-quera, covering agent guidance, project shape, visual style, quera page data findings and compatibility findings.
fast-browser CLAUDE.md
Claude Code instructions for m4ttstack/fast-browser, covering fast browser plugin, where a change belongs, fork branch: use fast-browser-runtime, releasing a new runtime and re-pinning this repo: use the script.
sendblue-browser-use AGENTS.md
Instructions for sendblue-api/sendblue-browser-use, covering agents.md — sendblue-browser-use, what this repo is, setup, common commands and health (no auth).
browser_oxide AGENTS.md
AGENTS.md instructions for yfedoseev/browser_oxide, covering browseroxide — conventions for ai coding assistants, build & test, architecture, key conventions and where to read more.
shantycrawl-mcp AGENTS.md
AGENTS.md instructions for schlemperdev/shantycrawl-mcp, covering shantycrawl mcp -- dynamic firecrawl mcp server, purpose, ownership, local contracts and work guidance.