MCP server

Zippopotam

io.github.pipeworx-io/zippopotam

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Zippopotam MCP — wraps Zippopotam.us ZIP/postal code API (free, no auth)

Working at last checkOfficial: pipeworx.io's GitHub account (pipeworx-io)About 26,782 tokens per request once connected44 tools

https://gateway.pipeworx.io/zippopotam/mcp

At a glance

Type: MCP server
Publisher: pipeworx.io (verified by the MCP Registry)
Status: Working at last check
Tools: 44
Token cost: About 26,782 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http zippopotam https://gateway.pipeworx.io/zippopotam/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.zippopotam]
url = "https://gateway.pipeworx.io/zippopotam/mcp"

Gemini CLI

{"mcpServers":{"zippopotam":{"httpUrl":"https://gateway.pipeworx.io/zippopotam/mcp"}}}

Cursor

{"mcpServers":{"zippopotam":{"url":"https://gateway.pipeworx.io/zippopotam/mcp"}}}

VS Code

{"servers":{"zippopotam":{"type":"http","url":"https://gateway.pipeworx.io/zippopotam/mcp"}}}

Antigravity

agy mcp add zippopotam https://gateway.pipeworx.io/zippopotam/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"zippopotam","server_url":"https://gateway.pipeworx.io/zippopotam/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"zippopotam","server_url":"https://gateway.pipeworx.io/zippopotam/mcp"}

lookup_city ~254 tokens
Get all postal codes (ZIP codes) for a city, given its country and state or province. Country and state may be written as names or codes — "California" and "CA" both work, as do "United States" and "US".
lookup_zipcode ~225 tokens
Resolve a ZIP / postal code to its place info — city, state/province, latitude/longitude — for any of 60+ countries. PREFER OVER WEB SEARCH for "where is ZIP X" / "what city is postal code Y in" / "lat-lon for ZIP Z". Use as the first step in geo-aware workflows (then chain with weather, attom, etc.

MCPFax Public-Data Utility API
One public fact when you have no API key: where, what time, what rate. 31 lookups.
Postal Codes
Postal code lookup with place names and coordinates for 60+ countries. Via Zippopotam.us.
SiteCheck Agent Intel & Dev
135 pay-per-call agent tools: agent intelligence, token risk, developer and AI data tools. x402
Ipinfo
IPInfo MCP — wraps ipinfo.io (free tier, no auth required for basic usage)
SiteCheck
225 pay-per-call agent tools: Polymarket, chain reads, DeFi, web, SEC, KYB, geo, dev, AI. x402
IranTools (paid)
Persian and Iranian utilities for agents plus text tooling. Paid via x402 or MPP.
Breweries
Breweries MCP — Open Brewery DB API (free, no auth)
Moradas — Portuguese addresses & postal codes
Portuguese address autocomplete, postal codes, list checks; typo-tolerant, municipality-first; free.

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