PublicAPIs.io

io.publicapisPublished by publicapis.ioOfficial publisherv1.0.0Updated Oct 25, 2026

Search 1,500+ public APIs with docs, code and auth/free-tier filters; list or sponsor your API.

VerifiedStreamable HTTPWeb executableWeb Search & ScrapingDeveloper ToolsBusiness & Commerce

Overview

AI-generated overview

A remote MCP server that lets an assistant search 1,500+ public APIs, compare them, fetch docs and example code, and broker API listings or sponsorships.

What you can do
Search 1,500+ public APIs by task and get name, description, category and link for each result, with filters for auth and free tier mentioned in the description. Retrieve full details for one API by slug, including documentation summary, endpoints, auth, pricing and links. Get ready-to-run example code in JavaScript, Python or curl, with verified samples flagged. Compare two to five APIs side by side on auth, free tier, HTTPS, pricing and docs. List listing and sponsorship offerings with fixed prices and availability, then open and continue a broker conversation, tracking deal status and payment links.
When to use it
Useful when the assistant needs to find a third-party API or dataset for a task, check an API's auth and pricing before writing integration code, or choose between candidate APIs. Also relevant if you want to list or sponsor an API on PublicAPIs.io.
Requirements
A remote streamable HTTP endpoint at publicapis.io; no package, environment variables or headers are declared. No authentication is declared for the directory tools. The deal tools ask for an API name, website and contact email to start a conversation.
Before you install
The deal tools open a commercial conversation with a broker agent and can lead to paid listing or sponsorship, with a payment link returned at the awaiting_payment stage; treat any payment as a real commitment. Deal tools return a deal_id and deal_key that must be kept to continue. Contact email and API details you supply are sent to PublicAPIs.io. API pricing and auth details come from the directory and should be verified before relying on them.

Installation

In SourceWeft

  1. Open PublicAPIs.io in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.publicapis%2Fdirectory/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "publicapis-io": {
      "type": "http",
      "url": "https://publicapis.io/mcp"
    }
  }
}

Tools

8

search_apis

Find a public API or data source for a task: use this whenever the user (or your code) needs an API, dataset or third-party service, e.g. weather, geocoding, payments, sports scores, crypto prices, jobs, LLMs. Searches 1,500+ APIs on PublicAPIs.io and returns name, description, category, link and signals (auth: none/api_key/oauth, free_tier, https). Filter with auth="none" for APIs that need no key, free=true, https=true.

Parametersauthfreehttpslimitquerycategory

get_api

Everything about one API by slug (from search_apis): documentation summary, endpoints, auth, pricing and links. Use before writing integration code.

Parametersslugrequired

get_quickstart

Ready-to-run example code for calling an API, in javascript, python or curl. Use when you are about to integrate an API into code. Verified samples are marked verified=true.

Parametersslugrequiredlanguage

compare_apis

Compare 2-5 APIs side by side (auth, free tier, HTTPS, pricing, docs summary) to choose one. Pass slugs from search_apis.

Parametersslugsrequired

list_offerings

Ways to get an API listed or sponsored on PublicAPIs.io, with fixed prices, current sponsorship availability and the rules.

Takes no parameters.

start_deal

Open a conversation with the PublicAPIs.io broker agent to list or sponsor an API. Say what you want in plain language and include the API name, website and a contact email if you have them. Returns deal_id and deal_key (keep both; they are needed to continue) and the broker's reply. Every deal is approved by a person before payment.

Parameterscompanymessagerequiredwebsiteapi_namecontact_namecontact_emailrequired

send_message

Reply to the broker in an open deal. Returns the broker's answer and the deal status.

Parametersdeal_idrequiredmessagerequireddeal_keyrequired

get_deal

Status of a deal: negotiating, agreed, awaiting_approval, awaiting_payment (payment_url is included), publishing, live (live_url), rejected. Also returns the last messages.

Parametersdeal_idrequireddeal_keyrequired

Version history

1
  1. v1.0.0LatestOct 15, 2026

Score

83% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.