PublicAPIs.io

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io.publicapis/directoryv1.0.0 Domain verified

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

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compare_apis Read-only

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

slugsarray, required

Tools (8)

compare_apis

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

read-only

Argument	Type	Description
slugs*	array

Input schema (JSON)

{
  "type": "object",
  "required": [
    "slugs"
  ],
  "properties": {
    "slugs": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 5,
      "minItems": 2
    }
  }
}

get_api

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

read-only

Argument	Type	Description
slug*	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "slug"
  ],
  "properties": {
    "slug": {
      "type": "string"
    }
  }
}

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.

read-only

Argument	Type	Description
deal_id*	string
deal_key*	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "deal_id",
    "deal_key"
  ],
  "properties": {
    "deal_id": {
      "type": "string"
    },
    "deal_key": {
      "type": "string"
    }
  }
}

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.

read-only

Argument	Type	Description
slug*	string
language	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "slug"
  ],
  "properties": {
    "slug": {
      "type": "string"
    },
    "language": {
      "enum": [
        "javascript",
        "python",
        "curl"
      ],
      "type": "string"
    }
  }
}

list_offerings

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

read-only

No arguments.

Input schema (JSON)

{
  "type": "object",
  "properties": {}
}

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.

read-only

Argument	Type	Description
auth	string	Only APIs with this authentication. "none" = no key needed.
free	boolean	Only APIs with a free tier.
https	boolean	Only APIs served over HTTPS.
limit	integer
query	string	What the API should do, in plain words.
category	string	Optional category name or id, e.g. "Weather", "finance".

Input schema (JSON)

{
  "type": "object",
  "properties": {
    "auth": {
      "enum": [
        "none",
        "api_key",
        "oauth"
      ],
      "type": "string",
      "description": "Only APIs with this authentication. \"none\" = no key needed."
    },
    "free": {
      "type": "boolean",
      "description": "Only APIs with a free tier."
    },
    "https": {
      "type": "boolean",
      "description": "Only APIs served over HTTPS."
    },
    "limit": {
      "type": "integer",
      "maximum": 20,
      "minimum": 1
    },
    "query": {
      "type": "string",
      "description": "What the API should do, in plain words."
    },
    "category": {
      "type": "string",
      "description": "Optional category name or id, e.g. \"Weather\", \"finance\"."
    }
  }
}

send_message

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

Argument	Type	Description
deal_id*	string
message*	string
deal_key*	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "deal_id",
    "deal_key",
    "message"
  ],
  "properties": {
    "deal_id": {
      "type": "string"
    },
    "message": {
      "type": "string"
    },
    "deal_key": {
      "type": "string"
    }
  }
}

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.

Argument	Type	Description
company	string
message*	string
website	string
api_name	string
contact_name	string
contact_email*	string	Where approval, payment link and go-live emails are sent.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "message",
    "contact_email"
  ],
  "properties": {
    "company": {
      "type": "string"
    },
    "message": {
      "type": "string"
    },
    "website": {
      "type": "string"
    },
    "api_name": {
      "type": "string"
    },
    "contact_name": {
      "type": "string"
    },
    "contact_email": {
      "type": "string",
      "description": "Where approval, payment link and go-live emails are sent."
    }
  }
}