Work with this as data
Every API here is available over the APIs.io API and to AI agents over MCP.
MCP server
One button, every client — Claude, Cursor, VS Code and the rest.
https://apis.io/mcp
Tools for apis
7 MCP tools reach this
find_apisBrowse and filter every API in the catalog.get_api_artifactsOne API's artifacts, grouped by type.get_openapiThe primary OpenAPI for this API.find_similar_apisAPIs that look like this one.apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.resolveTurn a domain, URL or GitHub org into the provider it belongs to.find_cohortsEvery scored population of providers in the catalog.
Call it yourself
curl for this page
This API
curl "https://apis.io/api/v1/apis/optimyzee:optimyzee-app-freelimit-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"
Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.
Get an API key
Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.
A second provider on the same verified email joins the account you already have.
OpenAPI Specification
openapi: 3.2.0
info:
title: App/Free Limit API
version: 4.1.0
description: App/FreeLimit
tags:
- name: App/FreeLimit
description: App/FreeLimit
paths:
/app/campaign/free-limit-check:
get:
tags:
- App/FreeLimit
operationId: appFreeLimitCheck
parameters:
- name: action_key
in: query
description: 'Ex: publish.campaign, start.optimization, report.generate...'
required: true
schema:
type: string
responses:
'200':
description: Successful check
content:
application/json:
schema:
required:
- available
properties:
available:
type: boolean
type: object
'422':
description: Validation Error
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorBagSchema'
'401':
description: Unauthenticated
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorSchema'
security:
- token: []
summary: App free limit check
x-summary-source: derived
components:
schemas:
ErrorSchema:
required:
- errors
properties:
error:
type: string
message:
type:
- string
- 'null'
type: object
ErrorBagSchema:
required:
- errors
properties:
errors:
type: object
additionalProperties:
type: array
items:
type: string
type: object
securitySchemes:
token:
type: apiKey
description: Bearer token authorization
name: authorization
in: header