AtomicAPIs MCP Server

A Model Context Protocol (MCP) server that exposes 17 production-grade micro-API tools for AI assistants. Built with .NET 9 and the official ModelContextProtocol SDK.

MCP allows AI assistants like Claude to invoke these tools natively during conversation — no HTTP requests, API keys, or boilerplate needed on the client side.

Quick Install

One-click for Claude Desktop

Add this to your claude_desktop_config.json:

{
  "mcpServers": {
    "atomicapis": {
      "command": "dotnet",
      "args": ["run", "--project", "/path/to/atomicapis-mcp-server/src"]
    }
  }
}

One-click for Claude Code

claude mcp add atomicapis -- dotnet run --project /path/to/atomicapis-mcp-server/src

One-click for Kiro

Tools

| Tool | Method | Description | |------|--------|-------------| | WebToMarkdownTools | ExtractMarkdown | Scrape any URL and convert the page to clean Markdown. Strips nav, footer, scripts, and non-essential HTML to minimize tokens. SSRF-protected with a 5MB page limit. | | EmailShieldTools | VerifyEmail | Check if an email address is disposable or from a known burner domain. Validates format, checks against a curated domain list, and verifies MX records via DNS. | | TimezoneTools | ResolveTimezone | Convert latitude/longitude to full timezone data including IANA timezone, UTC offset, DST status, current local time, and next transition. | | SchemaSniffTools | InferSchema | Auto-detect the format (JSON, CSV, XML) of a payload and infer its schema — field names, types, nullability, and nesting. | | ProductSchemaTools | GenerateProductSchema | Generate JSON-LD Product structured data for SEO. Outputs both raw JSON-LD and a ready-to-embed <script> tag. | | CsvSurgeonTools | CleanCsv | Clean, normalize, and deduplicate CSV data. Fixes encoding, normalizes headers, collapses whitespace, pads/truncates rows, and optionally normalizes date formats. | | UtmLinkTools | CloakLink | Create cloaked UTM-tagged tracking URLs. Encode campaign parameters into a short token and decode them back. | | JsonRepairTools | RepairJson | Fix broken JSON from LLM outputs — trailing commas, unquoted keys, single quotes, missing brackets. Optionally validate against a JSON schema. | | TokenCounterTools | CountTokens | Count tokens for multiple LLM models (GPT-4, Claude, Llama, Mistral, Gemini). Estimates costs, context window usage, and flags when text exceeds the model's limit. | | EmailAuthGraderTools | GradeEmailAuth | Audit a domain's email authentication setup: SPF, DKIM, DMARC, MTA-STS, and BIMI. Returns a letter grade (A–F), score, and actionable recommendations. | | PiiRedactorTools | RedactPii | Detect and redact personally identifiable information from text. Handles emails, SSNs, credit cards, phone numbers, IP addresses, street addresses, dates of birth, and URLs. | | PhoneValidatorTools | ValidatePhone | Validate international phone numbers across 30+ countries. Returns E.164 format, country info, number type (mobile/landline), and formatted output. | | TaxIdValidatorTools | ValidateTaxId | Validate

... View full README on GitHub