27 Developer Tools APIs with verified auth, pricing and rate limits. 26 offer a free tier; 21 document an MCP server. Every field carries the source URL that states it.
| API | Category | Auth | Pricing | MCP | Free | Confidence |
|---|---|---|---|---|---|---|
| Amazon Scraper API amazonscraperapi.com | Developer Tools | api_key | freemium | ● | ● | high |
| BrewPage brewpage.app | Developer Tools | none | free | ● | ● | high |
| Geekflare API geekflare.com | Developer Tools | api_key | freemium | ● | ● | high |
| OpenQR openqr.uk | Developer Tools | bearer_token | freemium | ● | ● | high |
| Agify.io agify.io | Developer Tools | api_key | freemium | ● | ● | high |
| Appwrite appwrite.io | Developer Tools | api_key | freemium | ● | ● | high |
| Buddy buddy.works | Developer Tools | oauth2 | freemium | — | ● | medium |
| Genderize.io genderize.io | Developer Tools | api_key | freemium | ● | ● | high |
| Interzoid Convert Currency Rate API interzoid.com | Developer Tools | api_key | freemium | ● | ● | medium |
| Nationalize.io nationalize.io | Developer Tools | api_key | freemium | ● | ● | high |
| Labs64 NetLicensing RESTful API netlicensing.io | Developer Tools | basic | freemium | ● | ● | high |
| Crawlbase proxycrawl.com | Developer Tools | api_key | freemium | ● | ● | high |
| QuickChart API quickchart.io | Developer Tools | none | freemium | — | ● | medium |
| ReqRes reqres.in | Developer Tools | api_key | freemium | — | ● | high |
| Bitrise bitrise.io | Developer Tools | bearer_token | freemium | ● | ● | medium |
| Apideck Accounting API apideck.com | Developer Tools | — | freemium | ● | ● | medium |
| The Jira Cloud platform REST API atlassian.com | Developer Tools | — | freemium | ● | ● | low |
| Fern buildwithfern.com | Developer Tools | — | freemium | ● | ● | medium |
| Extpose API extpose.com | Developer Tools | api_key | freemium | — | ● | medium |
| Postman API getpostman.com | Developer Tools | — | freemium | ● | ● | low |
| LaunchDarkly REST API launchdarkly.com | Developer Tools | api_key | freemium | ● | ● | low |
| Postman postman.com | Developer Tools | — | freemium | ● | ● | medium |
| ReadMe API readme.io | Developer Tools | api_key | freemium | ● | ● | medium |
| APIMATIC API Transformer apimatic.io | Developer Tools | — | freemium | — | ● | medium |
| CircleCI REST API circleci.com | Developer Tools | — | usage_based | ● | ● | low |
| Heroku Platform API heroku.com | Developer Tools | other | usage_based | — | — | low |
| Redocly redoc.ly | Developer Tools | — | freemium | ● | ● | low |